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Data Description

JPSS CrIS SDR Operational (CrIS_SDR)
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.