BandsSynonymous with channel number. The channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm |
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Bits/PixelUser option for the data delivery format. Indicates the number of bits to be used to represent each sensor pixel value in the delivery file. Choosing 8 or 16-bits/pixel results in the unpacking of the sensor data and the placing of each pixel value into the indicated number of bits. Note that the sensor data originates in a packed format with each pixel value occupying 10 bits. If 8 is chosen, the original 10-bit raw data is reduced to 8 bits/pixel. If 16 is chosen, the original 10 bits are preserved and are packed into a 16-bit word. User interface note: Users can specify bits/pixel in the formatting of their extracted data. Selections 8 and 16 are for unpacked extraction and allow users to subsequently specify which channels they wish to receive. If users specify raw data, they will receive all channels in the original 10-bits/pixel format. |
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Channel NumberThe channel number, or band, of the instrument that acquired the data. Channel numbers are associated with different wavelengths or ranges of wavelengths within the electromagnetic spectrum, e.g. on GOES, channel 1 is 3900 nm. |
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CoverageIndicates the geographic area of the dataset. Note that coverage does not apply to B11 data. Listed below are the definitions of the abbreviated coverage names. I indicates the coverage name is applicable to Imager data. S indicates applicability to Sounder data.
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Data Usage Guidance/RestrictionsThe operational data for this datatype is available to all registered CLASS users. Pre-operational data may be restricted to authorized users. To become an authorized user, send a request to the CLASS Help Desk. |
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Dataset Max LatitudeThe latitude of the northernmost pixel of the dataset. |
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Dataset Max LongitudeThe longitude of the westernmost pixel of the dataset. |
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Dataset Min LatitudeThe latitude of the southernmost pixel of the dataset. |
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Dataset Min LongitudeThe longitude of the easternmost pixel of the dataset. |
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Dataset SizeThe size in bytes of the file to be delivered to the user. |
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Dataset NameThe name of the Level 1B data set archived at CLASS. The name has the following format: <Satellite ID>.<Year>.<Julian Day>.<Start Time>.sndr
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Data SourceCode internal to CLASS for the source of GVAR data. |
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Easternmost ElementThe element number of the easternmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan. |
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End TimeThe UTC date and time corresponding to the end of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds. |
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Geographic SubsetChecking the subset flag means that, if users perform a non-global spatial search, they will receive only those scans which intersect the geographic region they defined for that search. Users should note that they will receive a scan in its entirety even if only a portion of that scan lies within their search region. |
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Ingest StatusThe state of the dataset's ingestion process.
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Ingest TimeThe UTC date and time that the dataset was ingested. Format is yyyy-mm-dd hh:mm:ss |
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Inventory IDA unique numerical ID assigned to the dataset for CLASS inventory purposes. |
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Map OverlayThe order option that allows a map of political borders to be drawn on images generated from a dataset. |
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Northernmost ScanlineThe line number of the northernmost pixel in the dataset. Lines are the index for the vertical axis of a scan. |
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Output FormatUser option for the format of the output file. Note that Block 11 data is only available in the raw format. The valid formats are:
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SatelliteAbbreviation that identifies the satellite that acquired the dataset. Listed below are the definitions of the abbreviated satellite IDs:
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Satellite ScheduleThe schedule, or mode of operation, that the satellite was in when it collected the data contained within the given dataset. Listed below are the definitions of the abbreviated schedule codes:
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Southernmost ScanlineThe line number of the southernmost scanline in the dataset. Lines are the index for the vertical axis of a scan. |
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Spatial ResolutionThe spatial resolution of the dataset, often specified in kilometers (km) and measured at instrument nadir (point directly below the satellite). VIS spatial resolution refers to the spatial resolution of the visible channels, IR spatial resolution refers to that of the infrared channels. |
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SpatialRefers to the geographic area of interest to the user. This section of the search page allows the user to define the geographic area of interest. |
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Start TimeThe UTC date and time corresponding to the beginning of the coverage of the given dataset. Format is yyyy-mm-dd hh:mm:ss.fff where fff is the fraction of a second in milliseconds. |
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Subpoint LatitudeThe latitude of the point on Earth that is directly below the satellite. |
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Subpoint LongitudeThe longitude of the point on Earth that is directly below the satellite. |
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Subset FlagThe order preference field that specifies that a line item is to be a geographic subset of the original dataset. When this flag is checked, the user is requesting that the output dataset include a subset of all scans which intersect the user's spatial area specified at the time of their search. Unchecking this option results in a request for the full dataset. |
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TemporalRefers to the time span of interest to the user. This section of the search page allows the user to define the range of dates/times of interest |
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UTCCoordinated Universal Time (UTC) is the international time standard. It is the current term for what was referred to as Greenwich Meridian Time (GMT). Zero (0) hours UTC is midnight in Greenwich England, which lies on the zero longitudinal meridian. Universal time is based on a 24 hour clock, therefore, afternoon hours such as 4 pm UTC are expressed as 16:00 UTC (sixteen hours, zero minutes). |
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Westernmost ElementThe element number of the westernmost pixel of the dataset. Elements are the index for the horizontal x-axis of a scan. |