Shortname: OMSO2 Longname: OMI/Aura Sulphur Dioxide (SO2) Total Column 1-Orbit L2 Swath 13x24 km PFS Version: 2.0.5 Date: 2020 June 4 Authors: C. Li, N. Krotkov, P. Leonard, S. Carn, A.J. Krueger PGE Version: 2.0.2 Lead Algorithm Scientists: C. Li, N. Krotkov Other Algorithm Scientists: S. Carn, A.J. Krueger Lead PGE Developer: C. Li Other PGE Developer: P. Leonard Description: > This document specifies the format of the Version 2.0.2 OMSO2 product produced by the OMSO2, OMSO2VOLCANO, OMSO2PCA_LUT and OMSO2MRGPCA Apps (Reference 1). Each one-orbit OMSO2 granule is stored as an HDF-EOS 5 swath file, and has a size of up to 30 MB. Global Metadata: - Metadata Name: AuthorAffiliation Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PCF Description: Actual is "NASA/GSFC". - Metadata Name: AuthorName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PCF Description: > Actual is "C. Li, N. Krotkov, P. Leonard, S. Carn, A.J. Krueger". - Metadata Name: GranuleDay Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Range or Valids: Range is 1 to 31. Data Source: PGE Description: > The UTC day of the UTC month at the start of the granule. - Metadata Name: GranuleMonth Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Range or Valids: Range is 1 to 12. Data Source: PGE Description: The UTC month at the start of the granule. - Metadata Name: GranuleYear Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Range or Valids: Range is 2004 to 2030. Data Source: PGE Description: > The (four-digit) UTC year at the start of the granule. - Metadata Name: HDFEOSVersion Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Automatically set by HDF-EOS. Data Source: HE Description: > Example is "HDFEOS_5.1.15" (this attribute is attached to the "HDFEOS INFORMATION" group in the HDF-EOS5 file). - Metadata Name: InputVersions Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PGE Description: > A list of the product ShortNames plus versions used as input for the processing. - Metadata Name: InstrumentName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Valids are "HIRDLS", "MLS", "OMI" and "TES". Data Source: PCF Description: Actual is "OMI" (see Section 6.1 of Reference 2). - Metadata Name: OrbitData Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Valids are "DEFINITIVE" and "PREDICTED". Data Source: L1B Description: > Indicates whether orbit data used by the L1B processor is definitive or predicted. - Metadata Name: PGEVERSION Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Range is "0.0.0" to "9.9.99". Data Source: PCF Description: Actual is "2.0.2". - Metadata Name: ProcessingCenter Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PCF Description: Example is "OMI SIPS". - Metadata Name: ProcessingHost Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PCF Description: > The output from executing the Unix "uname -a" command on the processing machine. - Metadata Name: ProcessLevel Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Valids are "1B", "2" and "3". Data Source: PCF Description: Actual is "2". - Metadata Name: TAI93At0zOfGranule Mandatory: T Data Type: HE5T_NATIVE_DOUBLE Number of Values: 1 Range or Valids: Range is -5.0d+00 to 1.0d+10. Data Source: PGE Description: > The TAI93 time at 0z of the granule (see Section 6.1 of Reference 2). Swath Metadata: - Metadata Name: EarthSunDistance Mandatory: T Data Type: HE5T_NATIVE_FLOAT Number of Values: 1 Minimum Value: 1.47e+11 Maximum Value: 1.53e+11 Data Source: L1B Description: > The Earth-sun distance (in m) at the time of the irradiance measurement. - Metadata Name: NumTimes Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 1700 Data Source: L1B Description: The number of "scan" lines in the swath. - Metadata Name: NumTimesSmallPixel Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 1700 Data Source: L1B Description: The number of small pixel "scan" lines in the swath. - Metadata Name: SwathName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: Valid is "OMI Total Column Amount SO2". Data Source: PGE Description: > Actual is "OMI Total Column Amount SO2" (this is the name of the swath group in the HDF-EOS5 file). - Metadata Name: VerticalCoordinate Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Range or Valids: > Valids are "Pressure", "Altitude", "Potential Temperature", "Slant Column" and "Total Column". Data Source: PGE Description: > Actual is "Total Column" (see Section 6.2 of Reference 2). Swath Dimensions: - Dimension Name: nCorners Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Range or Valids: Range is 4 to 4. Data Source: PGE Description: The number of corners per ground pixel. - Dimension Name: nLayers72 Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Range or Valids: Range is 72 to 72. Data Source: PGE Description: The number of GEOS-5 layers. - Dimension Name: nTimes Data Type: HE5T_NATIVE_INT Dimension Type: VARIABLE Number of Values: 1 Range or Valids: Range is 0 to 1700. Data Source: L1B Description: The number of "scan" lines in the swath. - Dimension Name: nXtrack Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Range or Valids: Range is 60 to 60. Data Source: L1B Description: The number of ground pixels per "scan" line. Geolocation Fields: - Field Name: GroundPixelArea Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 300.0 to 2200.0. Missing Value: -1.2676506e+30 Units: km2 Data Source: PGE Title: "Ground Pixel Area" Description: > The area of the tiled ground pixel (in square km). - Field Name: GroundPixelQualityFlags Data Type: HE5T_NATIVE_UINT16 Dimensions: nTimes,nXtrack Range or Valids: Range is 0 to 65534. Missing Value: 65535 Units: NoUnits Data Source: L1B Title: "Ground Pixel Quality Flags" Description: > Bits 0 to 3 together contain the land/water flags: 0 - shallow ocean 1 - land 2 - shallow inland water 3 - ocean coastline/lake shoreline 4 - ephemeral (intermittent) water 5 - deep inland water 6 - continental shelf ocean 7 - deep ocean 8-14 - not used 15 - error flag for land/water Bits 4 to 7 are flags that are set to 0 for FALSE, or 1 for TRUE: Bit 4 - sun glint possibility flag Bit 5 - solar eclipse possibility flag Bit 6 - geolocation error flag Bit 7 - geolocation warning flag Bits 8 to 14 together contain the snow/ice flags (based on NISE): 0 - snow-free land 1-100 - sea ice concentration (percent) 101 - permanent ice (Greenland, Antarctica) 102 - not used 103 - dry snow 104 - ocean (NISE-255) 105-123 - reserved for future use 124 - mixed pixels at coastline (NISE-252) 125 - suspect ice value (NISE-253) 126 - corners undefined (NISE-254) 127 - error Bit 15 - NISE nearest neighbor filling flag. (See Section 6.2 of Reference 4 for more details.) - Field Name: Latitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -90.0 to 90.0. Missing Value: -1.2676506e+30 Units: degrees_north Data Source: L1B Title: "Geodetic Latitude" Description: > The geodetic latitude (in degrees) at the center of the ground pixel. - Field Name: Longitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: degrees_east Data Source: L1B Title: "Geodetic Longitude" Description: > The geodetic longitude (in degrees) at the center of the ground pixel. - Field Name: RelativeAzimuthAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: deg(EastofNorth) Data Source: OMTO3 Title: "Relative Azimuth Angle (sun + 180 - view)" Description: > The relative (sun + 180 - view) azimuth angle (in degrees) at the center of the ground pixel. - Field Name: SecondsInDay Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes Range or Valids: Range is 0.0 to 86401.0. Missing Value: -1.2676506e+30 Units: s Data Source: L1B Title: "Seconds after UTC midnight" Description: > The time (in s) after UTC midnight at the start of the "scan". - Field Name: SolarAzimuthAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: deg(EastofNorth) Data Source: L1B Title: "Solar Azimuth Angle" Description: > The solar azimuth angle (in degrees) at the center of the ground pixel. - Field Name: SolarZenithAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 180.0. Missing Value: -1.2676506e+30 Units: deg Data Source: L1B Title: "Solar Zenith Angle" Description: > The solar zenith angle (in degrees) at the center of the ground pixel. - Field Name: SpacecraftAltitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes Range or Valids: Range is 4.0E05 to 9.0E05. Missing Value: -1.2676506e+30 Units: m Data Source: L1B Title: "Spacecraft Altitude" Description: > Spacecraft altitude above WGS84 ellipsoid. - Field Name: SpacecraftLatitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes Range or Valids: Range is -90.0 to 90.0. Missing Value: -1.2676506e+30 Units: degrees_north Data Source: L1B Title: "Spacecraft Latitude" Description: > Spacecraft geodetic latitude above WGS84 ellipsoid. - Field Name: SpacecraftLongitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: degrees_east Data Source: L1B Title: "Spacecraft Longitude" Description: > Spacecraft geodetic longitude above WGS84 ellipsoid. - Field Name: TerrainHeight Data Type: HE5T_NATIVE_INT16 Dimensions: nTimes,nXtrack Range or Valids: Range is -200 to 10000. Missing Value: -32767 Units: m Data Source: L1B Title: "Terrain Height" Description: > The terrain height (in m) at the center of the ground pixel (from the OMI Level 1B file). - Field Name: TiledCornerLatitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack,nCorners Range or Valids: Range is -90.0 to 90.0. Missing Value: -1.2676506e+30 Units: degrees_north Data Source: OMPIXCOR Title: "Tiled Corner Latitude" Description: > Corner latitudes for the OMPIXCOR UV-2 tiled ground pixels (CCW relative to flight direction: LL, LR, UR, UL). - Field Name: TiledCornerLongitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack,nCorners Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: degrees_east Data Source: OMPIXCOR Title: "Tiled Corner Longitude" Description: > Corner longitudes for the OMPIXCOR UV-2 tiled ground pixels (CCW relative to flight direction: LL, LR, UR, UL). - Field Name: Time Data Type: HE5T_NATIVE_DOUBLE Dimensions: nTimes Range or Valids: Range is -5.0d09 to 1.0d10. Missing Value: -1.2676506002282294e+30 Units: seconds since 1993-01-01 Data Source: L1B Title: "Time at Start of Scan (TAI93)" Description: > The TAI93 time (in s) at the start of the "scan". - Field Name: ViewingAzimuthAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -180.0 to 180.0. Missing Value: -1.2676506e+30 Units: deg(EastofNorth) Data Source: L1B Title: "Viewing Azimuth Angle" Description: > The viewing azimuth angle (in degrees) at the center of the ground pixel. - Field Name: ViewingZenithAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 70.0. Missing Value: -1.2676506e+30 Units: deg Data Source: L1B Title: "Viewing Zenith Angle" Description: > The viewing zenith angle (in degrees) at the center of the ground pixel. Data Fields: - Field Name: AlgorithmFlag_SnowIce Data Type: HE5T_NATIVE_UINT8 Dimensions: nTimes,nXtrack Range or Valids: Range is 0 to 3. Missing Value: 255 Units: NoUnits Data Source: PGE Title: "Snow-Ice Algorithm Flag" Description: > The snow-ice algorithm flag associated with the ground pixel: 0 - no snow/ice 1 - snow/ice covered and cloud free 2 - possible snow/ice covered and cloud free 3 - snow/ice covered and likely cloud covered - Field Name: CloudFraction Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: OMCLDRR Title: "Effective Cloud Fraction (from OMCLDRR)" Description: > The effective cloud fraction of the mixed LER model associated with the ground pixel (from OMCLDRR). - Field Name: CloudPressure Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1200.0. Missing Value: -1.2676506e+30 Units: hPa Data Source: OMCLDRR Title: "Optical Centroid Pressure (from OMCLDRR)" Description: > The optical centroid pressure of the mixed LER model associated with the ground pixel (from OMCLDRR). - Field Name: CloudRadianceFraction Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: PGE Title: "Cloud Radiance Fraction at 313 nm" Description: > The cloud radiance fraction at 313 nm associated with the ground pixel. - Field Name: ColumnAmountO3 Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 50.0 to 700.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Best Total Ozone Solution (from OMTO3)" Description: > The best total ozone solution (in DU) associated with the ground pixel (from OMTO3). - Field Name: ColumnAmountSO2 Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (GEOS-5 Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and monthly mean a priori SO2 profile from GEOS-5 model simulations. - Field Name: ColumnAmountSO2_PBL Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (PBL, Fixed Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and a prescribed PBL SO2 profile assuming constant mixing ratio within 1 km above the surface and negligible SO2 above 1 km. - Field Name: ColumnAmountSO2_STL Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (STL, Fixed Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and a prescribed SO2 profile centered at 18 km. - Field Name: ColumnAmountSO2_TRL Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (TRL, Fixed Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and a prescribed SO2 profile centered at 3 km. - Field Name: ColumnAmountSO2_TRM Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (TRM, Fixed Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and a prescribed SO2 profile centered at 8 km. - Field Name: ColumnAmountSO2_TRU Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -10.0 to 2000.0. Missing Value: -1.2676506e+30 Units: DU Data Source: PGE Title: "Vertical Column Amount SO2 (TRU, Fixed Profile)" Description: > The total vertical column amount SO2 (in DU) associated with the ground pixel retrieved using the NASA Principal Component Analysis (PCA) SO2 retrieval algorithm and a prescribed SO2 profile centered at 13 km. - Field Name: Flag_RowAnomaly Data Type: HE5T_NATIVE_UINT8 Dimensions: nTimes,nXtrack Range or Valids: Range is 0 to 1. Missing Value: 255 Units: NoUnits Data Source: OMTO3 Title: "OMTO3 Row-Anomaly Flag" Description: > The OMI row-anomaly flag associated with the observation (from OMTO3): 0 - not affected by OMI row anomaly 1 - affected by OMI row anomaly - Field Name: Flag_SAA Data Type: HE5T_NATIVE_UINT8 Dimensions: nTimes,nXtrack Range or Valids: Range is 0 to 1. Missing Value: 255 Units: NoUnits Data Source: PGE Title: "South Atlantic Anomaly Flag" Description: > The South Atlantic Anomaly (SAA) flag associated with the ground pixel: 0 - not affected by SAA 1 - affected by SAA - Field Name: GEOS5LayerWeight Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack,nLayers72 Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: GEOS-5 Title: "GEOS-5 Layer Weight" Description: > The a priori SO2 profile associated with the ground pixel based on GEOS-5 model simulations, with the layer weight being the fraction of SO2 molecules contributed by each of the 72 vertical layers to the overall SO2 molecules within the entire atmospheric column. The 72 vertical layers are defined by LayerBottomPressure and a top of the atmosphere pressure of 0.01 hPa. - Field Name: LayerBottomPressure Data Type: HE5T_NATIVE_FLOAT Dimensions: nLayers72 Range or Valids: Range is 0.0 to 1013.25. Missing Value: -1.2676506e+30 Units: hPa Data Source: PGE Title: "Layer Bottom Pressure" Description: > The pressure at the bottom of each of the 72 vertical layers for which the scattering weight and the a priori SO2 profile are provided. - Field Name: PBLLayerWeight Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack,nLayers72 Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: PGE Title: "PBL Layer Weight" Description: > The a priori SO2 profile associated with the ground pixel assuming fixed mixing ratio within 1 km above the surface and negligible SO2 above 1 km. The layer weight represents the fraction of SO2 molecules contributed by each of the 72 vertical layers to the overall SO2 molecules within the entire atmospheric column. The 72 vertical layers are defined by LayerBottomPressure and a top of the atmosphere pressure of 0.01 hPa. - Field Name: RadiativeCloudFraction Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: PGE Title: "Radiative Cloud Fraction at 313 nm" Description: > The radiative cloud fraction at 313 nm associated with the ground pixel. - Field Name: Reflectivity342 Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: OMTO3 Title: "Simple Lambertian Equivalent Reflectivity at 342 nm" Description: > The Simple Lambertian Equivalent Relfectivity (SLER) at 342 nm associated with the ground pixel. - Field Name: ScatteringWeight Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack,nLayers72 Range or Valids: Range is 0.0 to 10.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: PGE Title: "Scattering Weight at 313 nm" Description: > The scattering weight at 313 nm associated with the ground pixel for each of the 72 vertical layers as defined by LayerBottomPressure and a top of the atmosphere pressure of 0.01 hPa. - Field Name: SceneReflectivity354 Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -0.3 to 1.2. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: OMCLDRR Title: "Scene Reflectivity at 354 nm (from OMCLDRR)" Description: > The scene reflectivity at 354 nm associated with the ground pixel (from OMCLDRR). - Field Name: SlantColumnAmountSO2 Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -3.0E17 to 6.0E19. Missing Value: -1.2676506e+30 Units: molec/cm2 Data Source: PGE Title: "Slant Column Amount SO2" Description: > The retrieved slant column amount SO2 (in molec/cm2) associated with the ground pixel. - Field Name: SurfaceReflectivity Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: OMCLDRR Title: "Surface Reflectivity at 360 nm (from OMCLDRR)" Description: > The surface reflectivity at 360 nm associated with the ground pixel (from OMCLDRR). - Field Name: TerrainPressure Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is 0.0 to 1013.25. Missing Value: -1.2676506e+30 Units: hPa Data Source: OMTO3 Title: "Terrain Pressure" Description: > The terrain pressure associated with the ground pixel (from OMTO3). - Field Name: UVAerosolIndex Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes,nXtrack Range or Valids: Range is -50.0 to 50.0. Missing Value: -1.2676506e+30 Units: NoUnits Data Source: PGE Title: "UV Aerosol Index (342.5-367 nm)" Description: > The UV aerosol index (342.5 and 367 nm) associated with the ground pixel. Core Metadata: - Metadata Name: AssociatedInstrumentShortName Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: Valid is "OMI". Data Source: MCF Description: Actual is "OMI". - Metadata Name: AssociatedPlatformShortName Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: Valid is "Aura". Data Source: MCF Description: Actual is "Aura". - Metadata Name: AssociatedSensorShortName Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: Valids are "CCD Ultra Violet" and "CCD Visible". Data Source: MCF Description: Actual is "CCD Ultra Violet". - Metadata Name: AutomaticQualityFlag Mandatory: T Data Type: VA64 Number of Values: 1 Range or Valids: Valids are "Passed", "Suspect" and "Failed". Data Source: PGE Description: > A granule-level quality flag that applies generally to the granule and specifically to the parameters at the granule level. - Metadata Name: AutomaticQualityFlagExplanation Mandatory: T Data Type: VA255 Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: PGE Description: > The definitions of "Passed", "Suspect" and "Failed" should go here. - Metadata Name: DayNightFlag Mandatory: T Data Type: VA5 Number of Values: 1 Range or Valids: Valids are "Day", "Night" and "Both". Data Source: MCF Description: Actual is "Day". - Metadata Name: EquatorCrossingDate Mandatory: T Data Type: D Number of Values: 1 Range or Valids: Range is "2004-10-01" to "2030-12-31". Data Source: L1B Description: > The UTC date of the descending equator crossing in the granule. - Metadata Name: EquatorCrossingLongitude Mandatory: T Data Type: LF Number of Values: 1 Range or Valids: Range is -180.0d0 to 180.0d0. Data Source: L1B Description: > The geodetic longitude of the descending equator crossing in the granule. - Metadata Name: EquatorCrossingTime Mandatory: T Data Type: T Number of Values: 1 Range or Valids: Range is "00:00:00.000000" to "23:59:59.999999". Data Source: L1B Description: > The UTC time of the descending equator crossing in the granule. - Metadata Name: InputPointer Mandatory: T Data Type: VA255 Number of Values: 0 to 10 Range or Valids: > Valid file names, each in double quotes, separated by commas, all surrounded by curved brackets. Data Source: PGE Description: > Example is ("OMI-Aura_L2-OMTO3_2017m0310t0549-o67293_v003-2019m0326t022820.he5", "OMI-Aura_L2-OMSO2PCA_2017m0310t054923-o67293_v003-2019m0510t093521.h5", "OMI-Aura_L2-OMSO2VOLCANO_2017m0310t054923-o67293_v003-2019m0515t082204.h5") - Metadata Name: LocalGranuleID Mandatory: T Data Type: VA80 Number of Values: 1 Range or Valids: > Range is "OMI-Aura_L2-OMSO2_2004m1001t0000-o00000_v001-2099m1231t235959.he5" to "OMI-Aura_L2-OMSO2_2030m1231t2359-o99999_v999-2099m1231t235959.he5". Data Source: PGE Description: > Example is "OMI-Aura_L2-OMSO2_2002m0630t2354-o21434_v001-2003m0515t181917.he5" (see Appendix E of Reference 3). - Metadata Name: LOCALVERSIONID Mandatory: T Data Type: VA60 Number of Values: 1 Range or Valids: > Valids are "RFC1321 MD5 = not yet calculated" and "RFC1321 MD5 = [0-9,a-f]{32}" Data Source: PCF Description: > The MD5 fingerprint of the HDF product file. - Metadata Name: OperationalQualityFlag Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: > Valids are "Passed", "Failed", "Being Investigated", "Not Investigated", "Inferred Passed", "Inferred Failed" and "Suspect". Data Source: L1B Description: > A granule-level quality flag that applies generally to the granule and specifically to the parameters at the granule level. - Metadata Name: OperationalQualityFlagExplanation Mandatory: T Data Type: VA255 Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: L1B Description: > The criteria for setting the OperationalQualityFlag should be stated here (this Metadata will not appear in the granule). - Metadata Name: OPERATIONMODE Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: > Valids are "Calibration", "Diagnostic", "Initialization", "Launch", "Normal", "Roll", "Routine", "Safe", "Solar Calibration", "Standby", "Survival" and "Test". Data Source: PCF Description: Actual is "Test". - Metadata Name: OrbitNumber Mandatory: T Data Type: I Number of Values: 1 Range or Valids: Range is 1 to 999999 Data Source: L1B Description: The OMI orbit number. - Metadata Name: ParameterName Mandatory: T Data Type: VA40 Number of Values: 1 Range or Valids: Valid is "Total Column Sulphur Dioxide". Data Source: PGE Description: > The measured science parameter expressed in the granule. - Metadata Name: PGEVERSION Mandatory: T Data Type: VA10 Number of Values: 1 Range or Valids: Range is "0.0.0" to "9.9.99". Data Source: PCF Description: Actual is "2.0.2". - Metadata Name: ProductionDateTime Mandatory: T Data Type: DT Number of Values: 1 Range or Valids: > "2004-10-01T00:00:00.000Z" to "2099-12-31T24:59:59.999Z" Data Source: TK Description: The date and time of the Level 2 processing. - Metadata Name: QAPercentCloudCover Mandatory: T Data Type: I Number of Values: 1 Range or Valids: Range is 0 to 100 Data Source: PGE Description: > The percent of the data in the granule that have cloud cover. - Metadata Name: QAPercentMissingData Mandatory: T Data Type: I Number of Values: 1 Range or Valids: Range is 0 to 100. Data Source: PGE Description: > The percent of the data in the granule that are missing. - Metadata Name: QAPercentOutofBoundsData Mandatory: T Data Type: I Number of Values: 1 Range or Valids: Range is 0 to 100. Data Source: PGE Description: > The percent of the data in the granule that are out of bounds data. - Metadata Name: RangeBeginningDate Mandatory: T Data Type: D Number of Values: 1 Range or Valids: Range is "2004-10-01" to "2030-12-31". Data Source: L1B Description: The UTC year, month and day when the granule began. - Metadata Name: RangeBeginningTime Mandatory: T Data Type: T Number of Values: 1 Range or Valids: Range is "00:00:00.000000" to "23:59:59.999999". Data Source: L1B Description: > The UTC hour, minute, second and fraction of a second when the granule began. - Metadata Name: RangeEndingDate Mandatory: T Data Type: D Number of Values: 1 Range or Valids: Range is "2004-10-01" to "2030-12-31". Data Source: L1B Description: The UTC year, month and day when the granule ended. - Metadata Name: RangeEndingTime Mandatory: T Data Type: T Number of Values: 1 Range or Valids: Range is "00:00:00.000000" to "23:59:59.999999". Data Source: L1B Description: > The UTC hour, minute, second and fraction of a second when the granule ended. - Metadata Name: REPROCESSINGACTUAL Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: > Valids are "processed 1 time", "processed 2 times", etc... Data Source: PCF Description: > An indication of what reprocessing has been performed on the granule. - Metadata Name: ReprocessingPlanned Mandatory: T Data Type: VA45 Number of Values: 1 Range or Valids: > Valids are "no further update anticipated", "further update is anticipated" and "further update anticipated using enhanced PGE". Data Source: DP Description: Actual is "further update is anticipated". - Metadata Name: ScienceQualityFlag Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: > Valids are "Passed", "Failed", "Being Investigated", "Not Investigated", "Inferred Passed", "Inferred Failed" and "Suspect". Data Source: DP Description: Actual is "Not Investigated". - Metadata Name: ScienceQualityFlagExplanation Mandatory: T Data Type: VA255 Number of Values: 1 Range or Valids: Not applicable (free format). Data Source: DP Description: > An explanation of the criteria used to set the science quality flag should go here. - Metadata Name: ShortName Mandatory: T Data Type: VA8 Number of Values: 1 Range or Valids: Valid is "OMSO2". Data Source: MCF Description: Actual is "OMSO2". - Metadata Name: VersionID Mandatory: T Data Type: SI Number of Values: 1 Range or Valids: Range is 0 to 999. Data Source: MCF Description: Actual is 3. Product Specific Attributes: - Metadata Name: EndBlockNr Mandatory: T Data Type: SI Number of Values: 1 to 500 Range or Valids: Range is 1 to 50. Data Source: L1B Description: The number of the NOSE end block along the track. - Metadata Name: PathNr Mandatory: T Data Type: I Number of Values: 1 to 500 Range or Valids: Range is 1 to 466. Data Source: L1B Description: Number of the NOSE path within the repeat cycle. - Metadata Name: SolarEclipse Mandatory: T Data Type: VA10 Number of Values: 1 Range or Valids: Valids are "TRUE" and "FALSE". Data Source: L1B Description: > The indicator that during part of the measurements a solar eclipse occurred. - Metadata Name: SouthAtlanticAnomalyCrossing Mandatory: T Data Type: VA10 Number of Values: 1 Range or Valids: Valids are "TRUE" and "FALSE". Data Source: L1B Description: > The indicator that during part of the measurements the spacecraft was in the SAA. - Metadata Name: StartBlockNr Mandatory: T Data Type: SI Number of Values: 1 to 500 Range or Valids: Range is 1 to 50. Data Source: L1B Description: Number of the NOSE start block along the track. Archived Metadata: - Metadata Name: ESDTDescriptorRevision Mandatory: T Data Type: VA20 Number of Values: 1 Range or Valids: Range is "0.0.0" to "9.9.99". Data Source: MCF Description: > This is the version of the ESDT descriptor file as determined by ECS. - Metadata Name: LongName Mandatory: T Data Type: VA80 Number of Values: 1 Range or Valids: > Valid is "OMI/Aura Sulphur Dioxide (SO2) Total Column 1-Orbit L2 Swath 13x24 km". Data Source: MCF Description: > Actual is "OMI/Aura Sulphur Dioxide (SO2) Total Column 1-Orbit L2 Swath 13x24 km" (see Appendix A of Reference 2). References: > 1. "Version 2 OMSO2 README File" (Version 2.0.0, 2020 February 29) (https://aura.gesdisc.eosdis.nasa.gov/data/Aura_OMI_Level2/OMSO2.003/doc/OMSO2Readme_V2.pdf) 2. "Aura File Format for Satellite Atmospheric Chemistry Data" (ESDS-RFC-009, Version 1.0, May 2008) (https://earthdata.nasa.gov/esdis/eso/standards-and-references/aura-file-format-satellite-atmospheric-chemistry-data) 3. "OMI Science Software Delivery Guide for Version 0.9" (OMI-SSDG-0.9.10, Version 0.9.10, 2005 June 22) 4. "OMI GDPS Input/Output Data Specification (IODS) Volume 2" (OMI-GDPS-IODS-2, SD-OMIE-7200-DS-467, 2009 November 3) (https://projects.knmi.nl/omi/documents/calibration/SD467_IODS_Vol_2_L1b_Products.pdf)