The Advanced Clear Sky Processor for Ocean (ACSPO) is the NOAA Enterprise SST system. The ACSPO system produces a consistent suite of SST products from multiple platforms and sensors. The products included in this CLASS data family were produced from observations acquired by the Advanced Very High Resolution Radiometer-3 (AVHRR-3) instrument onboard the following polar orbiting satellites: NOAA-18, NOAA-19, MetOp-A, MetOp-B, and MetOp-C. Products are provided in 4 km (GAC) resolution or 1 km (FRAC) resolution. Note, the ACSPO L2P and L3U products are produced in the Group for High-Resolution SST (GHRSST) Data Specification version 2 (GDS2) NetCDF format, whereas the other products are provided in the HDF data format. Additional file parameters (dependent on date and product type) include satellite and solar geometry, thermal band brightness temperatures, visible band albedos, and bit flags indicating viewing conditions such as cloud, day/night, sun glint, etc. Also included in the GHRSST files are SST quality indicators, numerical weather model forecast wind, and single sensor error statistics (SSES) for each pixel. The data are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) as daily gridded files in the HDF-EOS and netCDF-4 file formats with attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The Advanced Scatterometer (ASCAT) is one of several European instruments carried on the MetOp series satellites. Its prime objective is to measure wind speed and direction over the ocean and to use the information primarily for weather forecasting and climate research. Data from ASCAT is also being applied in a number of other areas such as the monitoring of land-ice, sea-ice, snow cover and soil moisture. ASCAT uses radar to measure the electromagnetic backscatter from the wind-roughened ocean surface. The measuring principle relies on the fact that winds over the sea cause small-scale disturbances of the sea surface, which modify its radar backscattering characteristics in a particular way. These backscattering properties are well known and are dependent on both the wind speed over the sea and the direction of the wind with respect to the point from which the sea surface is observed. There are three level 1b datasets in CLASS: Full Resolution, 25km and 50km. The format description of these datasets is described in EUMETSAT's ASCAT Product Guide located under the Details section.

The Advanced Scatterometer (ASCAT) onboard MetOp-C is a real aperture radar operating at 5.255 GHz (C-band) with vertically polarized antennas. The instrument uses radar to measure backscatter to determine wind speed and direction over the surface of the ocean. ASCAT data feeds numerical weather prediction models, provides useful information on ice, snow and soil moisture, and is used to analyze areas of individual storm activity. This data family includes three Level-2 ocean surface wind products provided at 50 km, 25 km, and Ultra-High (4-10 km) resolution. Also provided are ice coverage images for Alaska, Ross Ice Shelf, Weddel Sea, the Arctic, and Antarctica at an effective resolution of 12 - 15 km. These products are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) in the netCDF-4 file format with attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The Advanced Very High Resolution Radiometer (AVHRR) is a cross-track scanning system with five spectral bands having a resolution of 1.1 km and a frequency of earth scans twice per day (0230 and 1430 local solar time). There are three data types produced from the POES AVHRR. The Global Area Coverage (GAC) data set is reduced resolution image data that is processed onboard the satellite taking only one line out of every three and averaging every four of five adjacent samples along the scan line; the Local Area Coverage (LAC) data set is recorded onboard at original resolution (1.1 km) for part of an orbit and later transmitted to earth; and the High Resolution Picture Transmission (HRPT) is real-time downlink data. A fourth data type, Full Resolution Area Coverage (FRAC 1.1 km) is now available daily for the entire globe with the launch of MetOp-A, on October 19, 2006, Europe's first polar orbiting operational meteorological satellite system and the first of the European contribution to the Initial Joint Polar-Orbiting Operational Satellite System (IJPS). AVHRR data provide opportunities for studying and monitoring vegetation conditions in ecosystems including forests, tundra and grasslands. Applications include agricultural assessment, land cover mapping, producing image maps of large areas such as countries or continents, and tracking regional and continental snow cover. AVHRR data are also used to retrieve various geophysical parameters such as sea surface temperatures and energy budget data.

The Advanced Very High Resolution Radiometer 3 (AVHRR/3) onboard MetOp-C is a cross track scanner that senses the Earth's radiation via six channels ranging from 0.58 to 12.5 microns. These channels cover the visible (VIS), near-infrared (NIR), shortwave-infrared (SWIR), medium-wave-infrared (MWIR), and thermal-infrared (TIR) spectral regions. AVHRR/3 provides day and night imaging of land, water and clouds, and measures sea surface temperature, ice, snow and vegetation cover. This data family includes five Level-2 cloud products provided at three coverage resolutions: FRAC (1 km), GHRR (4 km) and HRPT (1 km). These products are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) in the netCDF-4 file format with attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The Advanced Very High Resolution Radiometer 3 (AVHRR/3) onboard MetOp-B and MetOp-C, is a cross track scanner that senses the Earth's radiation via six channels ranging from 0.58 to 12.5 microns. These channels cover the visible (VIS), near-infrared (NIR), shortwave-infrared (SWIR), medium-wave-infrared (MWIR), and thermal-infrared (TIR) spectral regions. AVHRR/3 provides day and night imaging of land, water and clouds, and measures sea surface temperature, ice, snow and vegetation cover. This data family includes Level-2 polar wind products for the Arctic and Antarctic; provided at 1 km Full Resolution Area Coverage (FRAC). These products are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) in the netCDF-4 file format with attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The primary products are global one degree maps of aerosol optical thickness based on one week's worth of data. Currently they are created from AVHRR channel 1 optical thickness retrievals from AVHRR global area coverage (GAC) data. Optical thickness, or optical depth,is a dimensionless quantity that indicates the amount of depletion that a beam of radiation undergoes as it passes through a layer of the atmosphere. Optical depth is a function of the density, composition, temperature, pressure, and volume of the layer. Aerosols are defined as suspensions of liquid droplets or solid particles in the atmosphere, including dust, smoke, sand, volcanic ash, sea spray and smog.

CoastWatch swath data derived from AVHRR is full pass swath projection data from different AVHRR receiving stations. The files contain multiple data variables stored using the HDF-4 Scientific Data Sets (SDS) model. The product contents are channel 1 albedo, channel 2 albedo, channel 3a albedo, channel 3 brightness temperature, channel 4 brightness temperature, channel 5 brightness temperature, moisture corrected sea-surface-temperature, 8-bit CLAVR ocean cloud mask, 2-bit CLAVR-X cloud mask, satellite zenith angle, solar zenith angle and relative azimuth angle.

The mapped data derived from AVHRR (Advanced High Resolution Radiometer) onboard NOAA and Metop satellites is divided into files for CoastWatch regions of interest. Each file contains multiple data variables stored using the HDF-4 Scientific Data Sets (SDS) model. The product contents are channel 1 albedo, channel 2 albedo, channel 3a albedo, channel 3 brightness temperature, channel 4 brightness temperature, channel 5 brightness temperature, moisture corrected sea-surface-temperature, 8-bit CLAVR ocean cloud mask, 2-bit CLAVR-X cloud mask, satellite zenith angle, solar zenith angle, relative azimuth angle and 8-bit graphics layers. The pixel resolution is 1.47 km/pixel except for synoptic region in Alaska (5 km/pixel) and the Great Lakes (1.8 km/pixel).

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

The sea surface temperature (SST) products were derived from NOAA's Polar-orbiting Operational Environmental Satellites (POES) for the coastal United States and created by NOAA CoastWatch Program. CoastWatch started with only POES/AVHRR SST data for the East Coast, but later added more regional nodes of Alaska, Caribbean, Gulf of Mexico, Hawaii, Great Lakes, Northeast, Southeast and West Coast. The products provided here are in the original CoastWatch Format, which does not apply to the SST data currently created. The new data is now provided in HDF format.

NOAA Coral Reef Watch program produces a suite of near-real-time global 50 km monitoring products, based on sea surface temperature (SST) observations from NOAA's Polar-orbiting Operational Environmental Satellites (POES), to pinpoint areas around the world where heat stress is sufficient to cause mass coral bleaching. This product suite is produced twice a week operationally and includes nighttime sea surface temperature, nighttime sea surface temperature anomaly, coral bleaching HotSpot, Degree Heating Week, and Bleaching Alert Area products.

ACCESS TO THE DATA IS RESTRICTED. The Global Change Observation Mission (GCOM) is a series of JAXA Earth Observation Missions as a successor to the EOS ADEOS 2 satellite and to the Aqua Mission. GCOM is, together with the GPM Mission, Japan's contribution to the GEOSS (Global Earth Observation System of Systems). The mission of GCOM-W1 is to observe the water cycle. The Advanced Microwave Scanning Radiometer-2 (AMSR2) aboard the GCOM-W1 detects microwave signals emitted naturally from the ground, sea surface and atmosphere, using six different frequency bands ranging from 7 GHz to 89 GHz. The AMSR2 microwave observations can be used to assess precipitation, vapor amounts, wind velocity above the ocean, sea water temperature, water levels on land areas, and snow depths. This collection contains the AMSR2 Raw Data Records (RDR) which are used to develop the higher-level processed products, Sensor and Environmental Data Records (SDR and EDR). Also, included in this data collection are the GCOM-W1 Two Line Elements and Mission Notices. ACCESS TO THE DATA IS RESTRICTED.

The Advanced Microwave Scanning Radiometer-3 (AMSR-3) onboard Japan's Global Observation Satellite for Greenhouse gases and Water cycle (GOSAT-GW) is a mult-purpose microwave imager acquiring observations in the 6.9 GHz to 89 GHz range. AMSR-3 data products include sea-ice coverage, snow coverage, snow water equivalence, and Water Vapor data. The GOSAT-GW data family provides GOSAT-GW diary and telemetry data and AMSR-3 mission data and telemetry files. The data are produced by the Japan Aerospace Exploration Agency (JAXA) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS). Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The GOME-2 total ozone retrieval algorithm is based on OMI/TOMS (Ozone Monitoring Instrument / Total Ozone Mapping Spectrometer) V8 algorithm, which is a three-step process of successive estimation improvement. The algorithm uses a pair of wavelengths 331nm and 318nm (340nm and 331nm for high solar zenith angle) to derive total ozone and surface reflectivity. It first calculates N-value at the pair of wavelengths using input radiance/irradiance from GOME-2 level 1b data. With its geo-reference information, such as latitude, longitude, solar zenith angle, etc., the measured N-value is compared with pre-calculated N-value to derive the step-one total ozone and reflectivity. The pre-calculated N-value is generated by using OTMRAD forward radiative transfer model. In order to obtain step-two ozone, the profiles of ozone and temperature climatologies are then applied at all levels to account for seasonal and latitudinal variations in profile shape. In the last step, the step-two ozone estimation is modified to correct for wavelength dependent effects (tropospheric aerosol and sun glint) and local upper level profile shape effects. The algorithm writes out all the retrieval variables and corresponding geo-referenced information to PMF at the end of each scan process. Each day, the granules are accumulated to create the level 3 gridded map in ASCII and GRIB2 format. The Level 3 products are created by computing weighted averages of the Level 2 products with Fields of View intersecting each 1.25 degrees Longitude by 1.00 degree Latitude grid cell. (In polar regions the cells increase to 5.00 degrees Longitude.) The weights scale as the reciprocal of the relative path lengths (one divided by the sum of the secant of view angle plus secant of solar zenith angle) for each observation. The Magnesium II information is extracted daily from the GOME-2 1B granules, as soon as new solar radiance measurements are available. The product includes a 61-wavelength subset of the daily solar spectrum and a Mg II core-to-wing ratio for the spectrum. Our Mg II Index value is a simple ratio of the average of the irradiance measurements near three core wavelengths to the average of the irradiance measurements near four wavelengths at the wings, two at each wing. Each irradiance value is computed by interpolation of the pair of values for GOME-2 surrounding the following positions: 276.82, 276.97, 279.78, 279.92, 280.07, 283.03, and 283.17 nm. The daily gridded total ozone and Magnesium II products are available in ASCII format.

GOME-2 is a scanning spectrometer used to measure profiles of atmospheric ozone and to measure other trace gases in the atmosphere. It is an adaptation of a similar instrument already successfully flown on ESA's ERS-2 satellite. It is a nadir viewing across-track scanning spectrometer with a swath width of 1920 km. It measures the radiance back-scattered from the atmosphere and the surface of the Earth in the ultraviolet and visible range. The instrument uses four channels to cover the full spectral range from 240 to 790 nm with a spectral resolution of 0.2 nm at the lower end of the range, rising to 0.4 nm at the higher end. The instrument employs a mirror mechanism which scans across the satellite track with a maximum scan angle that can be varied from ground control, and three multi-spectral samples per scan. The ground pixel size of GOME-2 is 40 x 80 km.

The GOME-2 total ozone retrieval algorithm is based on OMI/TOMS (Ozone Monitoring Instrument / Total Ozone Mapping Spectrometer) V8 algorithm, which is a three-step process of successive estimation improvement. The algorithm uses a pair of wavelengths 331nm and 318nm (340nm and 331nm for high solar zenith angle) to derive total ozone and surface reflectivity. It first calculates N-value at the pair of wavelengths using input radiance/irradiance from GOME-2 level 1b data. With its geo-reference information, such as latitude, longitude, solar zenith angle, etc., the measured N-value is compared with pre-calculated N-value to derive the step-one total ozone and reflectivity. The pre-calculated N-value is generated by using a forward radiative transfer model. In order to obtain step-two ozone, the profiles of ozone and temperature climatologies are then applied at all levels to account for seasonal and latitudinal variations in profile shape. In the last step, the step-two ozone estimation is modified to correct for wavelength dependent effects (tropospheric aerosol and sun glint) and local upper level profile shape effects. The algorithm writes out all the retrieval variables and corresponding geo-referenced information to a Product Master File (PMF) at the end of each scan process. The PMF files are available in sequential binary format for each three minute granule.

There are two types of Initial Joint Polar-orbiting Operational Satellite (IJPS) System Companion files: 1. NOAA AIP 1a telemetry file - contains the AIP minor frame data as generated on-board the satellite for the orbit. An AIP minor frame contains packed, or commutated, instrument data and other satellite data covering a time period of 0.1 seconds. 2. IJPS Ancillary file - a tar file that contains all of the ancillary input files required by the preprocessor in order to identically reproduce its output (e.g., the 1b* data sets). These files include instrument-level 1a files, control files, navigation-related files, and calibration-related files.

The level 1C IASI data are collocated to points on a 3x3 degree global grid. This product is generated daily and consists of two files, one for ascending orbits and the other for descending orbits.

Level 1C data (Geo-Located, calibrated, apodized) For the IASI instrument on the METOP1 satellite, colocated to a 3x3 degree global grid. The daily files consist of a single colocation at each grid point, and are separated into ascending and descending files.

The Infrared Atmospheric Sounding Interferometer is a Cross-nadir infrared sounder flown on the European MetOp satellite series. IASI measures atmospheric emission spectra to derive temperature and humidity profiles with high vertical resolution and accuracy. IASI is a Michelson interferometer with spectral coverage between 3.6 and 15.5 micrometers. At nadir, the instrument samples data at intervals of 25 km along track and cross track with each sample having a maximum diameter of about 12 km. This data family provides IASI Level-1C data from EUMETSAT and IASI Level-2 NOAA Unique Products (NUPS) from NESDIS. The level 1C data is geo-located, calibrated and apodized. The NOAA Unique products include Cloud-Cleared Radiances (CCR), Outgoing Longwave Radiation (OLR), and an Environmental Data Record with ozone, temperature, moisture and trace gas profiles. These products are provided by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) in the netCDF-4 file format with attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

The Microwave Integrated Retrieval System (MIRS) provides an end-to-end capability for calibrating and characterizing the radiances measured from satellite-based microwave instruments using state of the art algorithm science. The MIRS produces advanced near-real-time operational surface and precipitation products for all-weather and surface conditions and is designed to be instrument-independent, parameter-independent, and platform-independent. Current MIRS instruments include the Advanced Microwave Sounding Unit-A (AMSU-A) and the Microwave Humidity Sounder (MHS) onboard NOAA-18, MetOp-A, MetOp-B, and MetOp-C satellites and the Special Sensor Microwave Imager/Sounder (SSMIS) aboard the DMSP 5D-2/F16 satellite. This data family includes global Level-3 (L3) daily precipitation and surface maps. These map provide Total Precipitable Water, Snow Water Equivalent, Cloud Liquid Water, Rainfall Rate, Snow Fall Rate, and Sea Ice Concentration data in polar stereographic and cylindrical stereographic projections. The data are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) as daily gridded files in the HDF-EOS and netCDF-4 file formats with attributes included.

The Microwave Integrated Retrieval System (MIRS) provides an end-to-end capability for calibrating and characterizing the radiances measured from satellite-based microwave instruments using state of the art algorithm science. The MIRS produces advanced near-real-time operational surface and precipitation products for all-weather and surface conditions and is designed to be instrument-independent, parameter-independent, and platform-independent. Current MIRS instruments include the Advanced Microwave Sounding Unit-A (AMSU-A) and the Microwave Humidity Sounder (MHS) onboard NOAA-18, MetOp-A, MetOp-B, and MetOp-C satellites and the Special Sensor Microwave Imager/Sounder (SSMIS) aboard the DMSP 5D-2/F16 satellite. This data family includes Level-2 (L2) sounding, precipitation and surface products. The sounding products provide temperature, water vapor, and hydrometeor profiles. The precipitation and surface products provide Total Precipitable Water (TPW), Snow Water Equivalent (SWE), Cloud Liquid Water (CLW), Rainfall Rate (RR), Snow Fall Rate, and Sea Ice Concentration measurements. The data are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) in the HDF-EOS and netCDF-4 file formats. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) descriptions, documentation, and possible bulk access options are available under the "Product Details" link.

Microwave Surface and Precipitation Products System (MSPPS) produces near real-time operational surface and precipitation products from the AMSU-A, AMSU-B and MHS instruments aboard NOAA and METOP satellites. The operational products include Antenna Temperatures, Total Precipitable Water, Cloud Liquid Water, Sea Ice Concentration, Land Surface Temperature, Land Surface Emissivity at 23.8, 31.4 and 50.3 GHz, Snow Cover, Rain Rate, Snow Water Equivalent and Ice-Water Path. Both Level-II (orbital) and Level-III (grid) products are available.The MSPPS grid products include Snow Cover, Rain Rate and Snow-Water Equivalent from AMSU-B/MHS and Sea Ice Concentration from AMSU-A. These level 3 geophysical products are mapped with the 1/16th-mesh Polar Stereographic projection and updated daily. They are available in HDF-EOS format.

Microwave Surface and Precipitation Products System (MSPPS) produces near real-time operational surface and precipitation products from the AMSU-A, AMSU-B and MHS instruments aboard NOAA and METOP satellites. The operational products include Antenna Temperatures, Total Precipitable Water, Cloud Liquid Water, Sea Ice Concentration, Land Surface Temperature, Land Surface Emissivity at 23.8, 31.4 and 50.3 GHz, Snow Cover, Rain Rate, Snow Water Equivalent and Ice-Water Path. Both Level-II (orbital) and Level-III (grid) products are available.The MSPPS orbital products include Antenna Temperatures from AMSU-A and AMSU-B/MHS, Total Precipitable Water, Cloud Liquid Water, Sea Ice Concentration, Land Surface Temperature, Land Surface Emissivity at 23.8, 31.4 and 50.3 GHz from AMSU-A and Snow Cover, Rain Rate, Ice-Water Path and Snow-Water Equivalent from AMSU-B/MHS. These level 2 products are available on an orbital basis for each instrument in BUFR and HDF-EOS formats. For validation purpose, the similar products from SSMI Sensor Data Records and Environmental Data Records are also converted into HDF-EOS format and included as a part of the MSPPS suite and are available to users.

The current AVHRRPF (or PATMOS) data sets cover the following satellites and time periods: NOAA-7 (9/81 - 1/85), NOAA-9 (2/85 - 10/88), NOAA-11 (11/88 - 8/94), and NOAA 14 (3/96 - 12/00). PATMOS-A1 computes statistics of the radiances in all five channels of the AVHRR from clear and cloudy 2x2 pixel arrays and from the total cloud amount for a total of 71 parameters. PATMOS-A2 computes statistics of aerosol optical thickness over the oceans, shortwave absorbed radiation, outgoing longwave radiation parameters of the radiation budget at the top of the atmosphere. Data presented here is extracted from PATMOS-A2 monthly mean.

The Radiation Budget product suite is produced from the primary morning and afternoon Polar Orbiters. Product shows a measure of the longwave radiation emitted (W/m^2) by the earth-atmosphere system to space. The observations are displayed on a one degree equal area map for the day and night.

The TIROS Operational Vertical Sounder (TOVS) system consisted of three instruments: the High Resolution Infrared Radiation Sounder Version 2 (HIRS/2), the Microwave Sounding Unit (MSU) and the Stratospheric Sounding Unit (SSU). This system was onboard the NOAA-6 through NOAA-14 and TIROS-N satellites. The Advanced TOVS (ATOVS) replaced the TOVS instruments starting from NOAA-15 onwards. It consists of HIRS/3, the Advanced Microwave Sounding Unit-A (AMSU-A) and AMSU-B. The Microwave Humidity Sounder (MHS), developed by EUMETSAT, replaced AMSU-B on NOAA-18 and the European MetOp satellites. Currently the ATOVS is generating products from the NOAA-15, 16, 18 and METOP-A satellites. This instrument package provides information on temperature and humidity profiles, total ozone, clouds and radiation on a global scale.

GVAR is the data transmission format used to broadcast environmental data measured by the independent GOES Imager and Sounder instruments. The Block 11 data files contain ancillary imager instrument data and metadata that may be useful to expert users as well as the raw soundings that have occurred over a one hour period.

The GOES Imager is a five-channel (one visible, four infrared) imaging radiometer designed to sense radiant and solar reflected energy from sampled areas of the earth. GVAR is the data transmission format used to broadcast environmental data measured by the independent GOES Imager and Sounder instruments, beginning with GOES-8 launched in 1994. Data distribution formats available are raw, AREA, NetCDF, GIF, and JPEG.

The GOES Sounder measures emitted radiation in 18 thermal infrared bands that are sensitive to temperature, moisture, and ozone, and reflected solar radiation in one visible band. The "footprint" or spatial resolution of the Earth sampling is 8 km with 13 bit data transmitted to the GOES receiving facilities. The Sounder data for one sounding has been extracted out of the GVAR data stream and stored in McIDAS Area format. Data distribution formats available are raw, AREA, NetCDF, GIF, and JPEG.

The PRE-GVAR data family provides reprocessed GOES Level-1 data from the Visible and Infrared Spin Scan Radiometer (VISSR) and from the VISSR Atmospheric Sounder (VAS). VISSR was active on GOES 1-3 and SMS 1-2, while VAS was active on GOES 4-7. These legacy instruments provided cloud imagery and atmospheric temperature and humidity soundings, which were used to monitor the atmosphere for severe weather; such as tornadoes, flash floods, hail storms, and hurricanes. GOES satellites are positioned 36,000 km (22,000 statute miles) above the equator. This fixed position above the earth allowed the satellites to scan large geographic regions of the Western Hemisphere. Coverage is provided by two GOES spacecraft, one at -75.0 Longitude (GOES East) and the other at -135.0 Longitude (GOES West). GOES VISSR and VAS reprocessed products were produced by the University of Wisconsin Space Science Engineering Center (SSEC) and archived by The NOAA National Centers for Environmental Information (NCEI). The archived products are distributed via CLASS in raw data and McIDAS file formats. Expand the "Details - Metadata, Documentation" section below for more information. Note: In 2022 an effort was taken to reprocess the SMS 1-2 and GOES 1-7 data to address ingest errors during the original read and processing from U-matic tape in the early 2000s. In addition to the ingest errors of the original data, there also existed multiple versions of the same image when a U-matic tape was read multiple times. During the reprocessing multiple occurrences of the same images were merged into a single best image. The following changes described did not make changes to the data from what would have been originally broadcast, but rather, it corrected errors due to ingest problems of the original data.

The GOES Surface and Insolation Products (GSIP) is a high spatial resolution (1/8 x 1/8 degrees) solar radiation product estimated from the GOES-East and -West Imager radiance measurements hourly for the Extended Northern Hemisphere scan sector and every three hours for the Full Disk scan sector. The products contain upwelling and downwelling shortwave (0.2-4.0 micrometers) and visible (0.4-0.7 micrometers) radiative fluxes at the top of the atmosphere and at the surface, cloud fraction and skin temperature. In addition to these primary products, cloud phase, visible cloud optical depth, outgoing longwave radiation, as well as derived byproducts (composite clear and cloudy reflectances) and ancillary data (total column amounts of water vapor and ozone) are also included. Compared with the earlier GSIP-CONUS product, the new GSIP products offer an improved accuracy and higher resolution insolation data for domains covering portions of the Atlantic and Pacific Oceans. These improvements offer better estimates of coral bleaching and provide the high-resolution data needed for validation and forcing of Numerical Weather Prediction (NWP) surface physics.

ABI Instrument Calibration Data

The Advanced Baseline Imager (ABI) is the primary instrument in the GOES-R Series for imaging Earth's weather, oceans, and environment. The ABI views the Earth with 16 different spectral bands compared to five on the previous generation GOES imagers. The ABI includes two visible channels, four near-infrared channels, and ten infrared channels, providing three times more spectral information, four times greater spatial resolution, and more than five times temporal coverage. This ABI data family includes the Level 1b Radiance data, Level 2 Cloud/Moisture Imagery, and several other Level 2 derived products. Product details (Readme's, maturity status) can be found at https://www.ncdc.noaa.gov/data-access/satellite-data/goes-r-series-satellites. The archived products are distributed in the netCDF-4 file format with metadata attributes included. Further information and details can be found in the "Details - Metadata, Documentation" section below. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

ADRS Ancillary Data

GLM L2+ Data Product

GRB Info packets

Instrument Cal - all other instruments and non-instrument specific

ISO Series-level Metadata

L1B Processing Params

L2+ Processing Parameters

MAG L1B Data Products

Satellite Instrument Calibration Ephemeris Data

GOES-R Series SEISS L1b Data Products (GRSEISPRD) - SEISS L1B Data Products

GOES-R Series EXIS L1b Products (GREXISPRD) - GOES-R Series EXIS Products

GOES-R Series SUVI L1b Data Products (GRSUVIPROD) - GOES-R Series SUVI L1b Data Products

The NOAA Office of Satellite and Product Operations (OSPO) generates geostationary sea surface temperature (SST) products. These products are derived from NOAA's Geostationary Operational Environmental Satellites (GOES) and Japan's Multi-functional Transport Satellite 1 Replacement (MTSAT-1R). They are available for the coastal United States including Alaska and Hawaii. Available products include GOES CoastWatch Regional SST, GOES Hourly SST Matchup, GOES Hourly SST, GOES 24-hourly SST, GOES 3-hourly SST, GOES CoastWatch Sectors SST (3-hour), GOES SST Daily Frontal Product, Blended SST 5-km Daily Product, Blended SST 11-km Daily Product, Meteosat Hourly SST Matchup, Meteosat 1-hour averaging SST, Meteosat 24-hour averaging SST, Meteosat 3-hour averaging SST, MTSAT Hourly SST Matchup, MTSAT Hourly SST, MTSAT 24-hourly SST, and Blended SST Night-only 5-km Daily Products. Data are output as binary at 6 km resolution.

The GOES-R Advanced Baseline Imager (ABI) Fog/Low Stratus (FLS) product provides estimates of low cloud/fog thickness and reduced aviation probabilities for Marginal Visual Flight Rules, Instrument Flight Rules, and Low Instrument Flight Rules. GOES-R ABI products are developed by the NOAA/NESDIS Center for Satellite Application and Research (STAR) and were produced within a near real-time environment at the NOAA/NESDIS Office of Satellite and Product Operations (OSPO). The archived products are distributed in the netCDF-4 file format with metadata attributes included. Please expand "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

GOES-R Series L1b Algorithm Package (GRL1ALGPKG)

GOES-R Series L2 Algorithm Packages (GRL2ALGPKG)

The DMSP is a Department of Defense (DoD) program which is responsible for designing, building, launching, and operating polar-orbiting environmental satellites. Data collected are from four instruments: Special Sensor Microwave Imager (SSM/I), Special Sensor Microwave Imager/Sounder (SSM/IS), Special Sensor Microwave Sounder (SSM/T), and the Special Sensor Microwave Water Vapor Profiler (SSM/T2). When the first SSM/IS instrument, aboard the F-16 platform, became operational in November 2005, it combined and extended the imaging and sounding capabilities of three previously separate DMSP microwave instruments: SSM/I, SSM/T and SSM/T2.

Microwave surface and precipitation products (EDRs) are produced by Fleet Numerical Meteorology and Oceanography Center (FNMOC) from the Defense Meteorological Satellite Program's (DMSP) Special Sensor Microwave/Imager (SSM/I) instrument aboard DMSP-14 satellite. Product contains maps for the northern hemisphere that conform to a polar stereographic projection true at 60 degrees latitude.

Microwave surface and precipitation products (EDRs) are produced by Fleet Numerical Meteorology and Oceanography Center (FNMOC) from the Defense Meteorological Satellite Program's (DMSP) Special Sensor Microwave/Imager (SSM/I) instrument aboard DMSP-15 satellite. Product contains maps for the northern hemisphere that conform to a polar stereographic projection true at 60 degrees latitude.

Microwave surface and precipitation products (EDRs) are produced by Fleet Numerical Meteorology and Oceanography Center (FNMOC) from the Defense Meteorological Satellite Program's (DMSP) Special Sensor Microwave/Imager (SSM/I) instrument aboard DMSP-14 satellite. Product contains maps for the southern hemisphere that conform to a polar stereographic projection true at 60 degrees latitude.

Microwave surface and precipitation products (EDRs) are produced by Fleet Numerical Meteorology and Oceanography Center (FNMOC) from the Defense Meteorological Satellite Program's (DMSP) Special Sensor Microwave/Imager (SSM/I) instrument aboard DMSP-15 satellite. Product contains maps for the southern hemisphere that conform to a polar stereographic projection true at 60 degrees latitude.

Types of data products: Brightness temp, surface temp, rain rate, sea ice snow cover, TPW, IWP, CLW, and emissivity products

The Advanced Technology Microwave Sounder (ATMS) is a cross-track microwave sounder providing atmospheric temperature and moisture observations for weather and climate applications. Level-1b Sensor Data Records (SDRs) from ATMS are the calibrated and geolocated radiance and reflectance data produced from ATMS Raw Data Records. This data family includes ATMS science SDRs and geolocation SDRs. The ATMS SDR (SATMS) provides radiance measurements at a nadir resolution of 15.8 - 74.8 km. The ATMS Remapped to CrIS SDR (SATMR) provides radiance measurements remapped to observations obtained from the Cross-track Infrared Sounder (CrIS). These SDRs provide key input for the production of atmospheric sounding Environmental Data Records (EDR). ATMS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

The Advanced Technology Microwave Sounder (ATMS) is a cross-track microwave sounder providing atmospheric temperature and moisture observations for weather and climate applications. Level-1b Sensor Data Records (SDRs) from ATMS are the calibrated and geolocated radiance and reflectance data produced from ATMS Raw Data Records. This data family includes reprocessed ATMS science SDRs and geolocation SDRs from Suomi NPP. The reprocessing generated consistent Level-1b SDRs using unified and consistent calibration algorithms that removed artificial jumps in data caused by operational changes, instrument anomalies, contamination from anomaly views of the environment or spacecraft, and other causes. The reprocessed SDRs were compared with and validated against other observations whenever such data were available. This data family includes two reprocessed data versions (RP1 and RP2). ATMS SDRs are used to produce atmospheric sounding Environmental Data Records (EDR). ATMS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included. See the 'Details - Metadata, Documentation' section below for additional information. Collection landing pages for the products included in this family can be accessed via the "Product Details" link.

The Advanced Technology Microwave Sounder (ATMS) is a cross-track microwave sounder providing atmospheric temperature and moisture observations for weather and climate applications. A Temperature Data Record (TDR) includes geolocated antenna temperatures, calibration data counts, and ephemeris data produced from Raw Data Records. This data family includes a single reprocessed ATMS TDR from Suomi NPP. The reprocessing generated a consistent Level-1 TDR using unified and consistent calibration algorithms that removed artificial jumps in data caused by operational changes, instrument anomalies, contamination from anomaly views of the environment or spacecraft, and other causes. The reprocessed TDR was compared with and validated against other observations whenever such data were available. This data family includes two reprocessed data versions (RP1 and RP2). The ATMS TDR is used as input to produce ATMS Sensor Data Records (SDR). Reprocessed ATMS TDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included. See the 'Details - Metadata, Documentation' section below for additional information. Collection landing pages for the products included in this family can be accessed via the "Product Details" link.

The Advanced Technology Microwave Sounder (ATMS) is a cross-track microwave sounder providing atmospheric temperature and moisture observations for weather and climate applications. A Temperature Data Record (TDR) includes geolocated antenna temperatures, calibration data counts, and ephemeris data produced from Raw Data Records. This data family includes a single ATMS TDR providing temperature measurements at a nadir resolution of 15.8 - 74.8 km. The ATMS TDR is used as input to produce ATMS Sensor Data Records (SDR). ATMS TDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

NPP Auxiliary data sets

The S-NPP Cal/Val Investigator Containers are tar files with associated metadata files containing investigation information.

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In conjunction with the Advanced Technology Microwave Sounder (ATMS) the Cross-track Infrared Sounder collects atmospheric data to permit the calculation of temperature and moisture profiles at high (~ daily) temporal resolution. The Cross-track Infrared Sounder (CrIS) provides improved measurements of the temperature and moisture profiles in the atmosphere. Forecasters use temperature and moisture sounding data in advanced numerical weather prediction models to improve both global and regional predictions of weather patterns, storm tracks, and precipitation.

In conjunction with the Advanced Technology Microwave Sounder (ATMS) the Cross-track Infrared Sounder collects atmospheric data to permit the calculation of temperature and moisture profiles at high (~ daily) temporal resolution. The Cross-track Infrared Sounder (CrIS) provides improved measurements of the temperature and moisture profiles in the atmosphere. Forecasters use temperature and moisture sounding data in advanced numerical weather prediction models to improve both global and regional predictions of weather patterns, storm tracks, and precipitation.

The Cross-track Infrared Sounder (CrIS) instrument onboard Suomi NPP provides atmospheric temperature and moisture observations for weather and climate applications. The CrIS sensor has three spectral bands: the long-wave infrared (LWIR) band (650-1095 cm-1), the mid-wave infrared (MWIR) band (1210-1750 cm-1), and the short-wave infrared (SWIR) band (2155-2550 cm-1). For each band, CrIS measures the infrared (IR) spectra from the Earth scene (ES) with a 3×3 detector array, corresponding to 9 field-of-views (FOVs) with a 14 km diameter at nadir or one field-of-regard (FOR). This data family includes calibrated radiance data (SCRIF or SCRIS) and geolocation (GCRSO) data. These Sensor Data Records (SDR) were generated from CrIS Raw Data Records (RDR) via the JPSS Interface Data Processing Segment (IDPS). CrIS SDR radiance products are assimilated into global numerical weather prediction (NWP) models, providing critical temperature and water vapor information for the improvement of weather forecasting. The CrIS sensor is also capable of sensing trace gas species (carbon dioxide, methane, carbon monoxide, ozone, among others) as well as critical climate variables such as surface temperature. CrIS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

The Cross-track Infrared Sounder (CrIS) instrument provides atmospheric temperature and moisture observations for weather and climate applications. The CrIS sensor has three spectral bands: the long-wave infrared (LWIR) band (650-1095 cm-1), the mid-wave infrared (MWIR) band (1210-1750 cm-1), and the short-wave infrared (SWIR) band (2155-2550 cm-1). For each band, CrIS measures the infrared (IR) spectra from the Earth scene (ES) with a 3×3 detector array, corresponding to 9 field-of-views (FOVs) with a 14-km diameter at nadir or one field-of-regard (FOR). This data family includes reprocessed version 2 (RP2) calibrated radiance data (SCRIF or SCRIS) and geolocation (GCRSO) data from Suomi NPP. These Sensor Data Records (SDR) were generated by the Center for Satellite Applications and Research (STAR) using the latest CrIS calibration coefficients and algorithms. The reprocessed SDRs are suitable for long-term climate monitoring, model assessment, and to evaluate the calibration accuracy of other instruments. Reprocessed CrIS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 8 minute files consisting of 15 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included. See the 'Details - Metadata, Documentation' section below for additional information. Collection landing pages for the products included in this family can be accessed via the "Product Details" link.

CRIMSS is a sensor suite consisting of the Cross-track Infra-red Sounder (CrIS) combined with the Advanced Technology Microwave Sounder (ATMS) that globally produces atmospheric temperature, moisture and pressure profiles from space. This data family supports the Environmental Data Records (EDR).

CRIMSS is a sensor suite consisting of the Cross-track Infra-red Sounder (CrIS) combined with the Advanced Technology Microwave Sounder (ATMS) that globally produces atmospheric temperature, moisture and pressure profiles from space. This data family supports the Environmental Data Records (EDR).

NPP Documentation

NPP Documentation

Mission Notices and Data Quality Monitoring (DQM) reports

NPP Ancillary data

NPP Ancillary data

NPP Software

NPP Spacecraft Telemetry

NPP Auxiliary data sets

NPP Test Data

Types of products: High performance Total Column environmental data records (EDR); Heritage TOMS V7 Total Column EDRs; High performance Ozone Profile EDRs; Heritage SBUV V6 Nadir Profile data records; IR Total Column data records from Cross-track Infra-red Sounder (CRIS) radiances

Types of products: High performance Total Column environmental data records (EDR); Heritage TOMS V7 Total Column EDRs; High performance Ozone Profile EDRs; Heritage SBUV V6 Nadir Profile data records; IR Total Column data records from Cross-track Infra-red Sounder (CRIS) radiances

Types of products: High performance Total Column environmental data records (EDR); Heritage TOMS V7 Total Column EDRs; High performance Ozone Profile EDRs; Heritage SBUV V6 Nadir Profile data records; IR Total Column data records from Cross-track Infra-red Sounder (CRIS) radiances

The Ozone Mapping and Profiler Suite (OMPS) tracks the health of the ozone layer and measures the concentration of ozone in the Earth's atmosphere. Level-1b Sensor Data Records (SDRs) from OMPS are the calibrated and geolocated radiance and reflectance data produced from OMPS Raw Data Records. This data family includes the OMPS Nadir Profile Science SDR, the OMPS Nadir Total Column Science SDR and OMPS geolocation and calibration SDRs. The Nadir Profile Science SDR provides vertical column radiance measurements detected with the Nadir Profiler at a spatial resolution of 250 km. The Nadir Total Column Science SDR provides total column radiance measurements detected with the Nadir Mapper at a spatial resolution of 50 km. These SDRs are used to produce several Environmental Data Records (EDR). OMPS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 102 minute files consisting of 163 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

The Ozone Mapping and Profiler Suite (OMPS) tracks the health of the ozone layer and measures the concentration of ozone in the Earth's atmosphere. Level-1b Sensor Data Records (SDRs) from OMPS are the calibrated and geolocated radiance and reflectance data produced from OMPS Raw Data Records. This data family includes a reprocessed OMPS Nadir Profile Science SDR, a reprocessed OMPS Nadir Total Column Science SDR and reprocessed OMPS geolocation and calibration SDRs from Suomi NPP. The Nadir Profiler Science SDR provides vertical column radiance measurements detected with the Nadir Profiler at a spatial resolution of 250 km. The Nadir Total Column Science SDR provides total column radiance measurements detected with the Nadir Mapper at a spatial resolution of 50 km. The reprocessing generated consistent Level-1 SDRs using unified and consistent calibration algorithms that removed artificial jumps in data caused by operational changes, instrument anomalies, contamination from anomaly views of the environment or spacecraft, and other causes. The reprocessed sensor data records were compared with and validated against other observations whenever such data were available. This data family includes two reprocessed data versions (RP1 and RP2). These SDRs provide key input for the production of several Environmental Data Records (EDR). Reprocessed OMPS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 102 minute files consisting of 163 granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included. See the 'Details - Metadata, Documentation' section below for additional information. Collection landing pages for the products included in this family can be accessed via the "Product Details" link.

This data family contains the raw, sensor and environmental data records from the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (S-NPP) satellite. VIIRS is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. VIIRS extends and improves upon a series of measurements initiated by the NOAA Advanced Very High Resolution Radiometer (AVHRR) and the NASA Moderate Resolution Imaging Spectroradiometer (MODIS).

This data family contains the raw, sensor and environmental data records from the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (S-NPP) satellite. VIIRS is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. VIIRS extends and improves upon a series of measurements initiated by the NOAA Advanced Very High Resolution Radiometer (AVHRR) and the NASA Moderate Resolution Imaging Spectroradiometer (MODIS).

This data family contains the raw, sensor and environmental data records from the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (S-NPP) satellite. VIIRS is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. VIIRS extends and improves upon a series of measurements initiated by the NOAA Advanced Very High Resolution Radiometer (AVHRR) and the NASA Moderate Resolution Imaging Spectroradiometer (MODIS).

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS Intermediate Products (IP) are products generated at a specific point in the data processing stream, stored for a finite period of time, and used internally as an input to other data processing applications. This data family includes three VIIRS intermediate products (IVOBC, ICDBG, IVCDB) generated from reprocessed VIIRS Sensor Data Records (SDRs). These products are not intended for general distribution, but are provided for interested parties because they contain onboard calibrator data as well as the un-aggregated radiometric and geolocation products (for the dual-gain bands only). VIIRS IP products are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS).

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS Intermediate Products (IP) are products generated at a specific point in the data processing stream, stored for a finite period of time, and used internally as an input to other data processing applications, such as in the production of Sensor Data Records (SDR) and Environmental Data Records (EDR). Some VIIRS IPs have become Environmental Data Records (EDR) produced as NOAA Enterprise Products. The JPSS_GRAN data family include five products that originated as IPs: VIIRS Ice Concentration, VIIRS Surface Reflectance, VIIRS Aerosol Optical Thickness, VIIRS Cloud Optical Properties and VIIRS Parallax Corrected Cloud Mask. VIIRS IP products are produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and are distributed by the Comprehensive Large Array-Data Stewardship System (CLASS).

This data family contains the raw, sensor and environmental data records from the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (S-NPP) satellite. VIIRS is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. VIIRS data is used to measure cloud and aerosol properties, ocean color, sea and land surface temperature, ice motion and temperature, fires, and Earth's albedo. VIIRS extends and improves upon a series of measurements initiated by the NOAA Advanced Very High Resolution Radiometer (AVHRR) and the NASA Moderate Resolution Imaging Spectroradiometer (MODIS).

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a scanning radiometer that collects radiometric measurements of the land, atmosphere, cryosphere, and oceans, ranging from visible to infrared spectral region. Sensor Data Records (SDRs) from VIIRS are the calibrated and geolocated radiance/brightness temperature and reflectance data produced from the Raw Data Records (RDRs). This data family includes 22 reprocessed VIIRS SDRs from Suomi NPP: 16 moderate-resolution, narrow-spectral-band products at 750 meters resolution, five imaging-resolution, narrow-spectral-band products at 375 meters resolution, and one Day-Night Band imaging broadband product at 750 meters resolution. This data family includes recalibrated and reprocessed version 2 (RP2) SDRs which were generated using consistent calibration algorithms that removed artificial jumps in temporal data trends caused by operational calibration updates, instrument anomalies, contamination from anomaly views of the environment or spacecraft, and other causes. The radiometric stability and accuracy, as well as the geolocation accuracy of the reprocessed SDRs were validated and verified against other observations whenever such data were available. VIIRS SDRs are used as input to produce many Environmental Data Records (EDR). VIIRS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 5.6-minute files consisting of four granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

The Visible Infrared Imaging Radiometer Suite (VIIRS) is a scanning radiometer that collects visible and infrared imagery and radiometric measurements of the land, atmosphere, cryosphere, and oceans. Level-1b Sensor Data Records (SDR) from VIIRS are the calibrated and geolocated radiance and reflectance data produced from the Raw Data Records. This data family includes 22 VIIRS SDRs: 16 moderate-resolution, narrow-spectral-band products at 750 meter resolution, five imaging-resolution, narrow-spectral-band products at 375 meter resolution and one Day-Night Band imaging broadband product at 750 meter resolution. VIIRS SDRs are used as input to produce multiple Environmental Data Records (EDR). VIIRS SDR data obtained from the NOAA Comprehensive Large Array-Data Stewardship System (CLASS) are distributed as aggregated 5.6 minute files consisting of four granules in the Hierarchical Data Format v.5 (HDF5) with metadata attributes included.

Visible Infrared Imaging Radiometer Suite (VIIRS) sensor data records and intermediate products from the Joint Polar Satellite System (JPSS) have been used to generate these VIIRS Level 3 non-granule products. The products were developed by the NOAA/NESDIS Center for Satellite Application and Research (STAR) and were produced within a near real-time environment at the NOAA/NESDIS Office of Satellite and Product Operations (OSPO). The VIIRS Polar Winds cover the Arctic and Antarctic from 65 degrees latitude poleward. Tropospheric winds are measured by tracking the motion of cloud features in the overlapping region of three successive orbits. A triplet of images is used to facilitate consistency checking and quality control. Wind products include wind speed, direction, and height at high latitudes. The VIIRS Green Vegetation Fraction (GVF) dataset is used as an input to land surface models to provide a better characterization of the earth surface. NESDIS will evaluate the vegetation environmental data records, compare VIIRS composites to the legacy baseline for consistency, implement algorithm enhancements, and tailor the products for use by NWP models and continuity requirements. The VIIRS Vegetation Health Products (VHP) algorithm provides weekly estimates of the Vegetation Condition Index (VCI), Temperature Condition Index (TCI) and Vegetation Health Index (VHI). These indices are designed to characterize moisture (VCI), thermal (TCI) and total vegetation health (VHI) conditions in response to weather impacts. The VHP algorithm requires a smoothed Normalized Difference Vegetation Index (NDVI) and Brightness Temperature (BT) from VIIRS. A 15-week time series smoothing technique is used. Data in the middle of the time series present the best result, and so the data of the 7th week (prior) is the final product. VIIRS-based products provide mission continuity from the AVHRR on NOAA and MetOp series satellites. These archived products are distributed in the netCDF-4 file format with metadata attributes included. Please expand "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

Cross-track Infrared Sounder (CrIS) and Advanced Technology Microwave Sounder (ATMS) sensor data records and intermediate products from the Joint Polar Satellite System (JPSS) have been used to generate these Level 2 granule sounding products. The Microwave Integrated Retrieval System (MIRS) ATMS precipitation and surface product, or imaging (IMG) products file, contains total precipitable water (TPW), skin temperature, emissivity by channel, rain rate, cloud liquid water (CLW), rain water path (RWP), ice water path (IWP), liquid water path (LWP), sea ice concentration, snow water equivalent (SWE), snow cover extent, and surface type classification. The MIRS ATMS sounding (SND) products file contains temperature and water vapor profiles at 850, 900 and 950 millibars. Quality control metrics and flags defining retrieval product quality are also provided in the MIRS output. The NOAA-Unique CrIS-ATMS Processing System (NUCAPS) produces Cloud-Cleared Radiances (CCRs) from CrIS observations that are co-located with ATMS. The EDR product consists of retrieved estimates of hydrological variables including temperature, water vapor, cloud fraction and cloud top pressure, along with trace gas retrievals including ozone (O3), methane (CH4), carbon monoxide (CO), carbon dioxide (CO2), sulfur dioxide (SO2), nitrogen dioxide (N2O), and nitric acid (HNO3), and a flag indicating the presence of dust and volcanic emissions. These archived products are distributed in the native 32-second granularity in netCDF-4 file format with metadata attributes included. Please expand "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

The NOAA/NESDIS Microwave Sounder-based Tropical Cyclone (TC) Products provide estimates of tropical cyclone maximum wind speed, minimum sea level pressure, radii of 34, 50, and 64 knot winds in 4 quadrants relative to the storm center, and balanced horizontal winds from 1000 to 200 mb within 600 km of the storm center. Estimates were derived from the Advanced Technology Microwave Sounder (ATMS) and Advanced Microwave Sounding Unit (AMSU). The product includes two output data types: 1) Tropical Cyclone Wind Products Radial/Height Cross Sections (RZA), and 2) Tropical Cyclone Wind Products Gridded Heights (XYA). Coverage is in six Global tropical cyclone basins, with a 6 x 6 degree domain centered on each active tropical cyclone. Special resolution is a 0.2 degree latitude/longitude grid for the balanced winds, and point resolution for the intensity/radii. Temporal resolution is every 6 hours, roughly 3 hours after meteorological synoptic time. The number of products produced per year depends on the number of tracked storms and their duration. Basin identifiers are determined by the location of the storm when it first forms and storms maintain that basin classification even if they travel into other basins. The product was developed by the NOAA/NESDIS Center for Satellite Application and Research (STAR) and is produced operationally at the NOAA/NESDIS Office of Satellite and Product Operations (OSPO). The archived product is distributed in the netCDF-4 file format with metadata attributes included. Please expand "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available under the "Product Details" link.

The River and Flood Forecast Maps data family includes flood map products generated from imagery acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS). In the future additional flood map products generated from the Geostationary Operational Environmental Satellite (GOES) instrument will also be included in this data family. The VIIRS instrument includes 22 spectral bands: 16 moderate-resolution, narrow-spectral-band at 750 meter resolution, five imaging-resolution, narrow-spectral-band at 375 meter resolution and one Day-Night Band imaging broadband at 750 meter resolution. The VIIRS 1-Day and 5-Day flood map products are generated from the VIIRS NRT Global Flood EDR at a resolution of 375 meters. These composite products are rendered using Area of Interest (AOI) maps. The globe is divided into 134 (15 x 15 degree) AOI maps, with each map showing the maximum 1-Day or 5-Day AOI flood extent. The 1-Day product is generated by compositing VIIRS NRT Global Flood EDR granules into AOI maps and the 5-Day product is generated by aggregating the 1-Day maps over a five day period. This data set is produced by the NOAA Environmental Satellite, Data, and Information Service (NESDIS) and is distributed by the Comprehensive Large Array-Data Stewardship System (CLASS) as 15 degree AOI interest files in the NetCDF file format with metadata attributes included. Expand the "Details - Metadata, Documentation" section below for more details. Individual product (Datatype) description, documentation, and possible bulk access options are available via the "Product Details" link.

Product shows global sea surface temperatures in degrees C. It is a composite gridded-image derived from 8-km resolution Global SST Observations and is generated daily on a global scale. SST is defined as the skin temperature of the ocean surface water.

This product presents local sea surface temperatures (degrees C). It is a composite gridded-image derived from 8-km resolution SST observations collected by Advanced High Resolution Radiometer (AVHRR) and HIRS (High Resolution Infrared Radiation Sounder) instruments onboard NOAA and Metop-A satellites. It is generated every 48 hours for North America. SST is defined as the skin temperature of the ocean surface water. Data may be output as netCDF and other formats (GIF, ASCII, spreadsheet). The pixel resolution is .125 x .125 degrees.

Product shows global sea surface temperatures in degrees C. It is a composite gridded-image derived from 8-km resolution Global SST Observations and is generated twice weekly (Tuesday and Saturday) on a global scale. SST is defined as the skin temperature of the ocean surface water.

The NOAA Office of Satellite and Product Operations (OSPO) generates geostationary sea surface temperature (SST) products. These products are derived from NOAA's Geostationary Operational Environmental Satellites (GOES) and Japan's Multi-functional Transport Satellite 1 Replacement (MTSAT-1R). They are available for the coastal United States including Alaska and Hawaii. Available products include GOES CoastWatch Regional SST, GOES Hourly SST Matchup, GOES Hourly SST, GOES 24-hourly SST, GOES 3-hourly SST, GOES CoastWatch Sectors SST (3-hour), GOES SST Daily Frontal Product, Blended SST 5-km Daily Product, Blended SST 11-km Daily Product, Meteosat Hourly SST Matchup, Meteosat 1-hour averaging SST, Meteosat 24-hour averaging SST, Meteosat 3-hour averaging SST, MTSAT Hourly SST Matchup, MTSAT Hourly SST, MTSAT 24-hourly SST, and Blended SST Night-only 5-km Daily Products. Data are output as binary at 6 km resolution.

The CLASS inventory of Synthetic Aperture Radar data includes imagery of global and repetitive observations of the environment. Imagery is obtained by the ERS-1, ERS-2 and RADARSAT-1 satellites, which are flown in sun-synchronous, polar orbits. Imaging is acquired irrespective of weather conditions. The SAR radar sensor is a microwave instrument that sends pulsed signals to the Earth and processes the received reflected pulses. Data are processed at one of four sites: Fairbanks, USA; Gatineau, Canada; Tromso, Norway; or West Freugh, UK. Data are in a variety of Beam Mode/Positions and product types (geo-coded or geo-referenced) on various dates.

This collection includes Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 Ancillary data files. The OSTM/Jason-2 and Jason-3 Ancillary data files are used to generate Level-2 products. They include both static tabular data files and dynamic files which change/grow over time. They are mission specific files used in the production of Level-2 products. All members of the OSTM/Jason-2 and Jason-3 Ancillary data family (J2-ANC) were made unrestricted on 15 December, 2008. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and Jason-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions are a joint effort by National Oceanic and Atmospheric Administration (NOAA), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and National Aeronautics and Space Administration (NASA). OSTM/Jason-2 was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. The start of cycle 1 occurred on 12 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. Jason-3 features the Poseidon-3B altimeter, developed by Thales Alenia Space in Toulouse. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

This collection contains Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 Auxiliary files. The OSTM/Jason-2 and Jason-3 Auxiliary data files are used to generate Level-2 products and include both static tabular data files and dynamic files which change/grow over time. Auxiliary files are produced outside of OSTM/Jason-2 and Jason-3 but are used in the production of Level-2 products. Filetypes in the Auxiliary data family which are produced by the European Center for Medium range Weather Forecasting (ECMWF) are restricted by ECMWF to the OSTM/Jason-2 and Jason-3 project teams. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and JASON-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions are a joint effort by National Oceanic and Atmospheric Administration (NOAA), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and National Aeronautics and Space Administration (NASA). OSTM/Jason-2 was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. The start of cycle 1 occurred on 12 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

This collection contains Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 level-2 Geophysical Data Records (GDR). The GDRs are available as 3 datatypes: Operational Geophysical Data Records (OGDR), Interim Geophysical Data Records (IGDR) and final Geophysical Data Records (GDR). The OGDRs are near-real-time records and are generated every 3-5 hours. They are based on orbits from DORIS propagator and forecast meteorological fields for the geophysical corrections. The IGDRs are based on preliminary DORIS ephemeris, analyzed meteorological grids, and preliminary auxiliary data files. The IGDRs have a latency of 1-2 days. The S-IGDR is a superset of the IGDR, containing the original radar echo "waveform" data. The GDRs are based on final high-precision DORIS (perhaps combined with GPS) ephemeris, final meteorological grids, ancillary and auxiliary data files. The S-GDR is a superset of the GDR, containing the waveform data. Sea Surface Height Anomaly (SSHA) files are available for IGDR and GDR. All files are available in NetCDF format and the OGDRs are also available in BUFR format. Jason-3 X-GDR data follows the structure and filetypes as that of OSTM/Jason-2 data. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and JASON-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions are a joint effort by National Oceanic and Atmospheric Administration (NOAA), the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and the National Aeronautics and Space Administration (NASA). The OSTM/Jason-2 satellite was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. Jason-3 features the Poseidon-3B altimeter, developed by Thales Alenia Space in Toulouse. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

This collection contains Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 Near Real-Time Altimetry Validation System Quality Reports (NRTAVS). Reports are daily and cover the previous 10-day period. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and JASON-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions are a joint effort by National Oceanic and Atmospheric Administration (NOAA), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and National Aeronautics and Space Administration (NASA). OSTM/Jason-2 was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. The start of cycle 1 occurred on 12 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

This collection includes Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 Orbital information. The component data types in this data family are GPSP1, TLE, MOE, and POE. GPSP1: Intermediate Level-1 data files are in "RINEX" format, from the Global Positioning System receiver. These are used to compute precise GPS orbits for the spacecraft. TLE: Two Line Element Files used to determine the position and velocity of the satellite. Within CLASS, they will be used directly to determine each orbit's equator crossing longitude and time which subsequently are used to support spatial search. MOE and POE: Medium-precision and Precision Orbital Ephemeris files from the DORIS system are produced by CNES for offline (IGDR, GDR) data production. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and JASON-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions are a joint effort by National Oceanic and Atmospheric Administration (NOAA), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and National Aeronautics and Space Administration (NASA). OSTM/Jason-2 was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. The start of cycle 1 occurred on 12 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

This collection contains Ocean Surface Topography Mission (OSTM)/Jason-2 and Jason-3 telemetry data. Dataset consists of raw Level-0 telemetry data from the satellite spacecraft. There are three datatypes produced: Housekeeping Telemetry - Recorded (HKTM-R) is stored on the spacecraft for later downlink, Payload Telemetry 1 (PLTM-1) is the payload science data from the core-mission payloads: Poseidon-3/3B, DORIS, AMR, and GPSP and Payload Telemetry 2 (PLTM-2) is the payload science data from the passenger mission of opportunity payloads: CARMEN-2, L2T2 and LPT. These data are subject to access restrictions. OSTM/Jason-2 and Jason-3 are follow-on missions continuing the TOPEX/Poseidon and JASON-1 missions, and were designed to ensure continuity of high quality measurements for ocean science and to provide operational products for assimilation and forecasting applications. The missions a are joint effort by National Oceanic and Atmospheric Administration (NOAA), European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), France’s Centre National d’Études Spatiales (CNES) and National Aeronautics and Space Administration (NASA). OSTM/Jason-2 was launched on 20 June 2008 and reached its nominal repetitive orbit on 4 July 2008. The start of cycle 1 occurred on 12 July 2008. After more than 11 years in orbit and well beyond its three- to five-year mission baseline, the Ocean Surface Topography Mission (OSTM) on Jason-2 permanently ceased acquisition of scientific data at 06:48 UTC on 1 October 2019 due to aging-related issues onboard the spacecraft. The development of the Jason-3 mission, and related Ground Segment, is based on a recurrent Jason satellite and ground system with a similar partnership scheme to OSTM/Jason-2. The Jason-3 satellite was launched on 17 January 2016 from Vandenberg Air Force Base in California, on a SpaceX Falcon 9 launcher, and was placed in the same orbit as OSTM/Jason-2. The satellite went operational on 14 October 2016.

NOAA CLASS archive: Continuously Operating Reference Stations (CORS) - The National Geodetic Survey (NGS), an office of NOAA's National Ocean Service (NOS), coordinates a network of geodetic-quality CORS stations that provide Global Positioning System (GPS) carrier phase and code range measurements in support of 3-dimensional positioning activities throughout the United States and its territories. The positions of these CORS sites help define the National Spatial Reference System (NSRS). NGS defines and manages the NSRS - the framework for latitude, longitude, height, scale, gravity, orientation and shoreline throughout the U.S. The NSRS provides a consistent national coordinate system to support mapping, charting, navigation, boundary determination, property delineation, infrastructure development, resource evaluation surveys, and scientific applications. The CORS system enables positional accuracies that approach a few centimeters relative to the NSRS, both horizontally and vertically.<br/><br/> While every effort is made to retain data in the original at-sampling rate, there may be cases where only the 30-second decimated rate data exists. Data availability (note latency from present day) for RINEX data is archive start date on 1994:112 and current date at 32-days before present; for raw GPS data (selected sites) is archive start date on 2004:193 and current date at 5 days before present.

The Global Navigation Satellite System (GNSS) Receiver for Atmospheric Sounding (GRAS) is a European GNSS receiver on board MetOp-A that operates as an atmospheric sounder. GRAS uses radio occultation to measure vertical profiles of atmospheric temperature and humidity by tracking signals received from a constellation of GNSS satellites while they are setting or rising behind the Earth's atmosphere. Radio occultation is based on the fact that when radio waves pass through the atmosphere, either during a rise event or during a set event as seen by the receiver, they are refracted along the atmospheric path. The degree of refraction depends on gradients of air density, which in turn depend on temperature and water vapor. Therefore, measurement of the refracted angle contains information about these atmospheric variables. As the measurements are made tangentially to the atmosphere, the profiles will be provided with a resolution within a few hundred meters to 1.5 kilometers, while horizontal coverage of each profile is in the order of a few hundred kilometers. With the nominal number of GNSS satellites, GRAS will provide 500 precise atmospheric profiles every day nearly equally distributed over the Earth's surface. GRAS can track up to eight satellites for navigation purposes, two additional satellites for rise and two others for set occultation measurements. GRAS has on-board GNSS satellite prediction for optimizing the navigation and occultation measurements. GRAS level 1b products contain information on a per occultation basis, along with auxiliary information.

The Climate Forecast System (CFS) is a fully coupled, 32-km 64-layer gridded global model representing the interaction between the Earth's oceans, land and atmosphere developed by the NCEP Environmental Modeling Center (EMC) for global reanalysis and reforecast efforts. The system includes two components: 1) a Reanalysis of the atmosphere, ocean, sea ice, and land over the 31-year period (1979-2009), which will be used to provide consistent initial conditions for 2) a complete Reforecast of the CFS over the 28-year period (1982-2009).

The Weather Analyses and Forecasts Charts from the NOAA National Weather Service (NWS) National Centers for Environmental Prediction (NCEP) are produced on a daily basis at meteorological synoptic times, normally at 00 and 12 UTC. Chart contents contain constant pressure charts, including the analyses and forecasts of heights, temperatures, winds, relative humidity, vertical velocity, vorticity, lifted index, thickness levels, and wind shear. Also available are surface analyses and charts of the Atlantic and Pacific with special emphasis on specific areas such as the Gulf of Alaska. The geographic coverage of includes the Northern and Southern Hemispheres, Tropical and Polar Regions. The charts are represented in 6-bit binary, TIFF, JPEG and GIF image file formats over the period of record from February 1994 to the present.

NOAA CoastWatch produces near real-time ocean color products, e.g., chlorophyll-a concentration and turbidity (reflectance), with data from NASA's GeoEye's Orbview-2 satellite (via contractual purchase). The data is collected by selected HRPT ground stations. The level 1A data consists of raw radiance counts from eight bands (six in visible and two in near infrared spectrum), calibration data, navigation data, instrument telemetry and selected spacecraft telemetry. Each level 2 satellite specific product has unique characteristics dependent on the sensor and the algorithm applied. While level 2 historic data is open to the public, level 1 data is restricted to users covered by SeaWiFS CoastWatch contract due to limitations associated with commercial data. The OrbView-2 spacecraft, which carried the SeaWiFS instrument, stopped communicating with Earth-based data stations in December 2010. After several months of attempts to revive the link, GeoEye, the company that operated the spacecraft, officially ended any further attempts at recovery.

This collection includes MODIS/Aqua chlorophyll frontal data products. The NOAA Okeanos operational production system produces near real-time chlorophyll frontal products (magnitude and direction), using data from MODIS/Aqua L2 chlorophyll products that are generated in the Okeanos system using the NASA L2gen ocean color algorithm. The chlorophyll frontal products are calculated using the BOA-SNRA algorithm, a combination of the Belkin-O'Reilly Algorithm (BOA) for front detection (Belkin and O'Reilly, 2009), and the Stripe Noise Reduction Algorithm (SNRA) (Belkin et al, 2013). The BOA-SNRA code is included in the CoastWatch ocean color products processing software that was written by the NOAA CoastWatch team. Maps of oceanic chlorophyll fronts can be directly used in marine fisheries, marine conservation, environment protection, and other applications and operations.

The Solar Backscatter Ultraviolet Radiometer-2 (SBUV/2) is an operational remote sensor designed to map, on a global scale, total ozone concentrations and the vertical distribution of ozone in the earth's atmosphere. The 1b Capture Data Set contains (1) all SBUV/2 sensor data and support data necessary for the derivation of atmospheric ozone and solar flux; (2) instrument in-flight calibration data and housekeeping functions for monitoring post-launch instrument changes; and (3) prelaunch calibration factors, and computed current-day instrument calibration and albedo correction factors to adjust the ozone algorithm for actual instrument performance.The Product Master File (PMF) contains ozone information located in space and time, other meteorological information developed in support of the ozone computation, parameters indicating the validity of the individual ozone retrievals, and the radiance information derived from the SBUV/2 measurements.