--- Shortname: OMBRO Longname: OMI/Aura Bromine Monoxide (BrO) Total Column 1-Orbit L2 Swath 13x24km PFS Version: 2.0.2b Date: 22 April 2008 Author(s): Thomas P. Kurosu (SAO) PGE Version: 2.0.2 Lead Algorithm Scientist: Kelly Chance (SAO) Lead Algorithm Developer: Kelly Chance (SAO) Lead PGE Developer: Thomas P. Kurosu (SAO) PGE Developer(s): Thomas P. Kurosu (SAO) Description: > This document specifies the product format for the Version 2.0.2 delivery of the OMBRO L2 PGE, which uses a Basic Optical Absorption Spectroscopy (BOAS) type algorithm based on non-linear least squares fitting to estimate total column BrO from OMI UV-2 measurements. The product is stored as one HDF-EOS 5 swath file for each granule (i.e., one orbit) of OMI L1B data, and has a size range of 5 to 38 Mb. The reference for the product is ATBD-OMI-04 entitled "OMI Trace Gas Algorithms". Global Metadata: - Metadata Name: AuthorAffiliation Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: Not applicable (free format). Data Source: PCF Description: Actual is "Smithsonian Astrophysical Observatory". - Metadata Name: AuthorName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: Not applicable (free format). Data Source: PCF Description: Actual is "Thomas P. Kurosu". - Metadata Name: GranuleDay Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 1 Maximum Value: 31 Data Source: PGE Description: The day of the month at the start of the granule. - Metadata Name: GranuleMonth Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 1 Maximum Value: 12 Data Source: PGE Description: The month at the start of the granule. - Metadata Name: GranuleYear Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 2003 Maximum Value: 2099 Data Source: PGE Description: The (four-digit) year at the start of the granule. - Metadata Name: HDFEOSVersion Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: Automatically set by HDF-EOS. Data Source: HE Description: Example is "HDFEOS_5.1.5". - Metadata Name: InputVersions Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: Not applicable (free format). Data Source: PGE Description: > A list of every ESDT (including version) whose product was used as input for the processing. - Metadata Name: InstrumentName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: HIRDLS,MLS,OMI,TES Data Source: PCF Description: Actual is "OMI" (see Section 6.1 of Reference 2). - Metadata Name: NumberOfBadOutputSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which retrieval was performed and quality status is 'bad'. - Metadata Name: NumberOfConvergedSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which the non-linear least squares fit converged. - Metadata Name: NumberOfCrossTrackPixels Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of across-track pixels for each scan line. Typical value is 60. - Metadata Name: NumberOfExceededIterationsSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which the non-linear least squares fit failed to converge because the maximum number of allowed iterations was exceeded. - Metadata Name: NumberOfFailedConvergenceSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which the non-linear least squares fit failed to converge. - Metadata Name: NumberOfGoodInputSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule on which retrieval is performed. - Metadata Name: NumberOfGoodOutputSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which retrieval was performed and quality status is 'good'. - Metadata Name: NumberOfInputSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule on which retrieval is performed. - Metadata Name: NumberOfOutOfBoundsSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which the retrieved columns are "out of bounds", i.e., negative within three sigma retrieval uncertainties. - Metadata Name: NumberOfScanLines Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: Number of scan lines in radiance granule - Metadata Name: NumberOfSuspectOutputSamples Mandatory: T Data Type: HE5T_NATIVE_INT Number of Values: 1 Minimum Value: 0 Maximum Value: 2147483647 Data Source: PGE Description: > Number of measurement pixels in granule for which retrieval was performed and quality status is 'suspect'. - Metadata Name: OrbitData Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: DEFINITIVE,PREDICTED Data Source: L1B Description: > Indicates whether orbit data used by the L1B processor is definitive or predicted. - Metadata Name: PercentBadOutputSamples Mandatory: T Data Type: HE5T_NATIVE_FLOAT Number of Values: 1 Minimum Value: 0.0 Maximum Value: 100.0 Data Source: PGE Description: > Percentage of performed retrievals with quality status 'bad'. - Metadata Name: PercentGoodOutputSamples Mandatory: T Data Type: HE5T_NATIVE_FLOAT Number of Values: 1 Minimum Value: 0.0 Maximum Value: 100.0 Data Source: PGE Description: > Percentage of performed retrievals with quality status 'good'. - Metadata Name: PercentSuspectOutputSamples Mandatory: T Data Type: HE5T_NATIVE_FLOAT Number of Values: 1 Minimum Value: 0.0 Maximum Value: 100.0 Data Source: PGE Description: > Percentage of performed retrievals with quality status 'suspect'. - Metadata Name: PGEVERSION Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Minimum Value: 0.0. Maximum Value: 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 Valids: Not applicable (free format). Data Source: PCF Description: Example is "OMIDAPS". - Metadata Name: ProcessingHost Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 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 Valids: 1b,2,3 Data Source: PCF Description: Actual is "2". - Metadata Name: SpaceCraftMaxAltitude Mandatory: T Data Type: HE5T_NATIVE_DOUBLE Number of Values: 1 Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Data Source: L1B Description: > Maximum elevation of the Aura space craft (in m). - Metadata Name: SpaceCraftMinAltitude Mandatory: T Data Type: HE5T_NATIVE_DOUBLE Number of Values: 1 Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Data Source: L1B Description: > Minimum elevation of the Aura space craft (in m). - Metadata Name: TAI93At0zOfGranule Mandatory: T Data Type: HE5T_NATIVE_DOUBLE Number of Values: 1 Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 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: SwathName Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: OMI Total Column Amount BrO Data Source: PGE Description: Actual is "OMI Total Column Amount BrO". - Metadata Name: VerticalCoordinate Mandatory: T Data Type: HE5T_NATIVE_CHAR Number of Values: 1 Valids: Pressure,Altitude,Potential Temperature,Slant Column,Total Column Data Source: PGE Description: > Actual is "Total Column" (see Section 6.2 of Reference 2). Swath Dimensions: - Dimension Name: nTimes Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: The number of "scan" lines in the swath. - Dimension Name: nUTCdim Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Minimum Value: 6 Maximum Value: 6 Data Source: PGE Description: The number of elements in the TimeUTC geolocation field. - Dimension Name: nXtrack Data Type: HE5T_NATIVE_INT Dimension Type: FIXED Number of Values: 1 Minimum Value: 0 Maximum Value: 60 Data Source: L1B Description: The number of ground pixels per "scan" line. Geolocation Fields: - Field Name: Latitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: -90.0 Maximum Value: 90.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Geodetic Latitude" Unique Field Definition: Aura-Shared Description: > The geodetic latitude (in deg) at the center of the ground pixel. - Field Name: Longitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: -180.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Geodetic Longitude" Unique Field Definition: Aura-Shared Description: > The geodetic longitude (in deg) at the center of the ground pixel. - Field Name: SolarAzimuthAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: -180.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Solar Azimuth Angle" Unique Field Definition: Aura-shared Description: > The solar azimuth angle (in deg) at the center of the ground pixel. - Field Name: SolarZenithAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: 0.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Solar Zenith Angle" Unique Field Definition: Aura-shared Description: > The solar zenith angle (in deg) at the center of the ground pixel. - Field Name: SpacecraftAltitude Data Type: HE5T_NATIVE_FLOAT Dimensions: nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: m Data Source: L1B Title: "Altitude of the Aura Spacecraft" Unique Field Definition: Aura-Shared Description: > The altitude (in m) of the EOS-Aura satellite above WGS84 ellipsoid. - Field Name: TerrainHeight Data Type: HE5T_NATIVE_INT16 Dimensions: nXtrack,nTimes Minimum Value: -1000 Maximum Value: 10000 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: m Data Source: L1B Title: "Terrain Height" Unique Field Definition: Aura-Shared Description: > The terrain height (in m) at the center of the ground pixel. - Field Name: Time Data Type: HE5T_NATIVE_DOUBLE Dimensions: nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+10 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: s Data Source: L1B Title: "Time in TAI units" Unique Field Definition: Aura-Shared Description: > The TAI93 time (in s) at the start of the "scan". - Field Name: TimeUTC Data Type: HE5T_NATIVE_INT16 Dimensions: nUTCdim,nTimes Minimum Value: 0.0e+00 Maximum Value: 9999e+00 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Coordianted Universal Time" Unique Field Definition: OMI-Specific Description: > UTC value of the TAI93 time at the start of the "scan". UTC time of format of the UTC string, YYYY-MM-DDThh:mm:ss.ddddddZ, is broken up into 6 integer fields containing YYYY = year (position 1) MM = month (position 2) DD = day (position 3) hh = hour (position 4) mm = minutes (position 5) ss = seconds (position 6) - Field Name: ViewingAzimuthAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: -180.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Viewing Azimuth Angle" Unique Field Definition: OMI-Specific Description: > The viewing azimuth angle (in deg) at the center of the ground pixel. - Field Name: ViewingZenithAngle Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: 0.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: L1B Title: "Viewing Zenith Angle" Unique Field Definition: OMI-Specific Description: > The viewing zenith angle (in deg) at the center of the ground pixel. Data Fields: - Field Name: AirMassFactor Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Molecule Specific Air Mass Factor (AMF)" Unique Field Definition: OMI-Specific Description: > Molecule specific air mass factor for each ground pixel, including scattering weights and vertical distribution of BrO. Currently a stratospheric-only distribution is assumed for BrO. - Field Name: AirMassFactorDiagnosticFlag Data Type: HE5T_NATIVE_INT16 Dimensions: nXtrack,nTimes Minimum Value: -2 Maximum Value: 13127 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Diagnostic Flag for Molecule Specific AMF" Unique Field Definition: OMI-Specific Description: > Diagnostic flag for molecule specific air mass factor for each ground pixel. The flag indicates surface conditions and out of bound viewing geometry. Except for geometry and surface type, flag is computed additively, i.e., it is the sum of all the conditions that apply to a ground pixel. Note that some of the values below are applicable to OMHCHO only. Non-additive values = -2 Out of bounds viewing geometry, no AMF computation possible = -1 No table lookup possible; geometric AMF used instead = 0-100 NISE snow cover fraction = 101 NISE permanent ice = 103 NISE dry snow = 104 NISE ocean = 125 NISE suspect (no snow cover assumed) = 127 NISE error (no snow cover assumed) Additive values + 1000 No OMI cloud fraction; use ISCCP climatology + 2000 No OMI cloud top height; use ISCCP climatology +10000 Sun glint possibility; assume albedo for ice - Field Name: AirMassFactorGeometric Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack,nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Geometric Air Mass Factor (AMF)" Unique Field Definition: OMI-Specific Description: > Geometric air mass factor for the viewing geometry of each ground pixel. - Field Name: AverageColumnAmount Data Type: HE5T_NATIVE_DOUBLE Dimensions: 1 Minimum Value: -1.0e+30 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Average Column Amount" Unique Field Definition: OMI-Specific Description: > Total column amount (in molecules/cm2) averaged over the the whole granule. - Field Name: AverageColumnUncertainty Data Type: HE5T_NATIVE_DOUBLE Dimensions: 1 Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Average Column Uncertainty" Unique Field Definition: OMI-Specific Description: > Total column amount uncertainty (in molecules/cm2) averaged over the the whole granule. - Field Name: AverageFittingRMS Data Type: HE5T_NATIVE_DOUBLE Dimensions: 1 Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Average Fitting RMS" Unique Field Definition: OMI-Specific Description: > Fitting RMS averaged over the the whole granule. - Field Name: ColumnAmount Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack,nTimes Minimum Value: -1.0e+30 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Column Amount" Unique Field Definition: OMI-Specific Description: > Total column amount (in molecules/cm2) for each ground pixel. - Field Name: ColumnAmountDestriped Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack,nTimes Minimum Value: -1.0e+30 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Column Amount with Destriping Correction" Unique Field Definition: OMI-Specific Description: > Total column amount (in molecules/cm2) for each ground pixel after application of a post-fitting destriping correction and cross-track bias removal. - Field Name: ColumnUncertainty Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack,nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Column Uncertainty" Unique Field Definition: OMI-Specific Description: > Total column amount uncertainty (in molecules/cm2) for each ground pixel. - Field Name: FitConvergenceFlag Data Type: HE5T_NATIVE_INT16 Dimensions: nXtrack,nTimes Minimum Value: -12 Maximum Value: 12344 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Fitting Convergence Flag" Unique Field Definition: OMI-Specific Description: > The flag indicating the type of (non-) convergence of the non-linear least squares fitting routine associated with the ground pixel. Exit integer scalar that indicates why the return is taken: =10000 convergence due to criterion no. 1 below = 2000 convergence due to criterion no. 2 below = 300 convergence due to criterion no. 3 below = 40 convergence due to criterion no. 4 below = x where x equals 0,1,2,3 or 4 < 0 indicates that no convergence criterion is fulfilled but some abnormal termination criterion is satisfied = -1 if m= m) m integer scalar containing the number of data points - Field Name: FittingRMS Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack,nTimes Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Fitting RMS" Unique Field Definition: OMI-Specific Description: Fitting RMS for each ground pixel. - Field Name: MainDataQualityFlag Data Type: HE5T_NATIVE_INT16 Dimensions: nXtrack,nTimes Minimum Value: -1 Maximum Value: 2 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Main Data Quality Flag" Unique Field Definition: OMI-Specific Description: > Main flag to indicate data quality. Its main purpose is to give the user of the data an easy way to screen for suspect or bad pixels. The possible values are -1=Missing, 0=Good, 1=Suspect, 2=Bad. They are determined as follows. = 0 Column values are present and pass all quality checks. Data may be used with confidence = 1 Suspect columns. Data should be used with caution because one or more of the following quality checks failed: (a) FitConvergenceFlag is < 300 (but >= 0) (b) Column value plus 2 sigma fitting uncertainty is < 0.0, but Column value plus 3 sigma fitting uncertainty is >= 0.0 (c) Absolute column value larger than MaximumColumAmount = 2 Bad columns. Data should not be used at all, or only with extreme caution, because one or more of the following quality checks failed: (a) FitConvergenceFlag is < 0 (abnormal termination of fitting) (b) Column value plus 3 sigma fitting uncertainty is < 0.0 < 0 No column values have been computed; entries are missing. - Field Name: MaximumColumnAmount Data Type: HE5T_NATIVE_DOUBLE Dimensions: 1 Minimum Value: -1.0e+30 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Maximum Column Amount for QA Flag 'good'" Unique Field Definition: OMI-Specific Description: > Maximum absolute column amount up to which fitted colums qualify as 'good'. Beyond this value they are considered 'suspect'. - Field Name: PixelCornerLatitudes Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack+1,nTimes+1 Minimum Value: -180.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: PGE Title: "Pixel Corner Latitude Coordinates" Unique Field Definition: OMI-Specific Description: > The geodetic latitudes (in deg) of the corner coordinates of the OMI ground pixels. - Field Name: PixelCornerLongitudes Data Type: HE5T_NATIVE_FLOAT Dimensions: nXtrack+1,nTimes+1 Minimum Value: -180.0 Maximum Value: 180.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: deg Data Source: PGE Title: "Pixel Corner Longitude Coordinates" Unique Field Definition: OMI-Specific Description: > The geodetic longitudes (in deg) of the corner coordinates of the OMI ground pixels. - Field Name: RadianceReferenceColumnAmount Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack Minimum Value: -1.0e+30 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Radiance Reference Column Amount" Unique Field Definition: OMI-Specific Description: > Total column amount (in molecules/cm2) for each ground pixel. - Field Name: RadianceReferenceColumnUncertainty Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Radiance Reference Column Uncertainty" Unique Field Definition: OMI-Specific Description: > Total column amount uncertainty (in molecules/cm2) for each ground pixel. - Field Name: RadianceReferenceColumnXTRFit Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: molec/cm2 Data Source: PGE Title: "Radiance Reference Fit Colunm XTR Fit" Unique Field Definition: OMI-Specific Description: > Cross-track fit (in molecules/cm2) to RadianceReferenceColumnAmount that is removed from the radiance reference spectrum if the option to remove the target gas from the radiance reference has been selected. - Field Name: RadianceReferenceConvergenceFlag Data Type: HE5T_NATIVE_INT Dimensions: nXtrack Minimum Value: -10 Maximum Value: 12344 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Radiance Reference Fit Convergence Flag" Unique Field Definition: OMI-Specific Description: > The flag indicating the type of (non-) convergence of the non-linear least squares fitting routine for the radiance wavelength calibration. For a detailed description of the flag refer to FitConvergenceFlag. - Field Name: RadianceReferenceFittingRMS Data Type: HE5T_NATIVE_DOUBLE Dimensions: nXtrack Minimum Value: 0.0e+00 Maximum Value: 1.0e+30 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Radiance Reference Fitting RMS" Unique Field Definition: OMI-Specific Description: Fitting RMS for each ground pixel. - Field Name: RadianceReferenceLatitudeRange Data Type: HE5T_NATIVE_FLOAT Dimensions: 2 Minimum Value: -90.0 Maximum Value: 90.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Radiance Reference Fit LatitudeRange" Unique Field Definition: OMI-Specific Description: > Lower and upper latitude values defining the range that went into the composition of the radiance reference spectrum. If equal, a single swath line was used with latitude value at nadir closest to the lower latitude entry. - Field Name: RadianceWavCalConvergenceFlag Data Type: HE5T_NATIVE_INT Dimensions: nXtrack Minimum Value: -10 Maximum Value: 12344 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Radiance Wavelength Calibration Convergence Flag" Unique Field Definition: OMI-Specific Description: > The flag indicating the type of (non-) convergence of the non-linear least squares fitting routine for the radiance wavelength calibration. For a detailed description of the flag refer to FitConvergenceFlag. - Field Name: RadianceWavCalLatitudeRange Data Type: HE5T_NATIVE_FLOAT Dimensions: 2 Minimum Value: -90.0 Maximum Value: 90.0 Missing Value: -1.0e+30 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Radiance Wavelength Calibration Fit LatitudeRange" Unique Field Definition: OMI-Specific Description: > Lower and upper latitude values defining the range that went into the composition of the radiance spectrum used for wavelength calibration. If equal, a single swath line was used with latitude value at nadir closest to the lower latitude entry. - Field Name: SolarWavCalConvergenceFlag Data Type: HE5T_NATIVE_INT Dimensions: nXtrack Minimum Value: -10 Maximum Value: 12344 Missing Value: -30000 Offset: 0.0e+00 Scale Factor: 1.0e+00 Units: NoUnits Data Source: PGE Title: "Solar Wavelength Calibration Convergence Flag" Unique Field Definition: OMI-Specific Description: > The flag indicating the type of (non-) convergence of the non-linear least squares fitting routine for the solar wavelength calibration. For a detailed description of the flag refer to FitConvergenceFlag. Core Metadata: - Metadata Name: AssociatedInstrumentShortName Mandatory: T Data Type: VA20 Number of Values: 1 Valids: OMI Data Source: MCF Description: Actual is "OMI". - Metadata Name: AssociatedPlatformShortName Mandatory: T Data Type: VA20 Number of Values: 1 Valids: Aura Data Source: MCF Description: Actual is "Aura". - Metadata Name: AssociatedSensorShortName Mandatory: T Data Type: VA20 Number of Values: 1 Valids: CCD Ultra Violet,CCD Visible Data Source: MCF Description: Actual is "CCD Ultra Violet". - Metadata Name: AutomaticQualityFlag Mandatory: T Data Type: VA64 Number of Values: 1 Valids: Passed,Suspect,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 Valids: Passed,Suspect,Failed Data Source: PGE Description: > The AutomaticQualityFlag is set to (1) "Passed" if NrofGoodOutputSamples >= 75% of NrofGoodInputSamples (2) "Suspect" if NrofGoodOutputSamples >= 50% but < 75% of NrofGoodInputSamples (3) "Failed" if NrofGoodOutputSamples < 50% of NrofGoodInputSamples. - Metadata Name: DayNightFlag Mandatory: T Data Type: VA5 Number of Values: 1 Valids: Day,Night,Both Data Source: MCF Description: Actual is "Day". - Metadata Name: EquatorCrossingDate Mandatory: T Data Type: D Number of Values: 1 Minimum Value: 1995-01-01 Maximum Value: 2099-12-31 Data Source: L1B Description: > The date of the ascending equator crossing in the granule. - Metadata Name: EquatorCrossingLongitude Mandatory: T Data Type: LF Number of Values: 1 Minimum Value: -180.0 Maximum Value: 180.0 Data Source: L1B Description: > The terrestrial longitude of the ascending equator crossing in the granule. - Metadata Name: EquatorCrossingTime Mandatory: T Data Type: T Number of Values: 1 Minimum Value: 01:00:0.000000 Maximum Value: 01:59:59.999999 Data Source: L1B Description: > The time of the ascending equator crossing in the granule. - Metadata Name: InputPointer Mandatory: T Data Type: VA255 Number of Values: 0 to 10 Valids: Not applicable (free format). Data Source: PGE Description: > Valid file names, each in double quotes, separated by commas, all surrounded by curved brackets. Example is ("OMI-Aura_L1-OML1BRUG_2007m0413t1703-o14598_v003-2007m0605t113435.he4", "OMI-Aura_L1-OML1BRUG_2007m0413t0034-o14588_v003-2007m0605t114320.he4") - Metadata Name: LocalGranuleID Mandatory: T Data Type: VA80 Number of Values: 1 Minimum Value: OMI-Aura_L2-OMBRO_1995m0101t0000-o00000_v001-1995m0101t000000.he5 Maximum Value: OMI-Aura_L2-OMBRO_2099m1231t2359-o99999_v999-2099m1231t235959.he5 Data Source: PGE Description: > Example is "OMI-Aura_L2-OMBRO_2007m0413t1703-o14598_v003-2008m0209t171735.he5" (see Appendix E of Reference 3). - Metadata Name: LOCALVERSIONID Mandatory: T Data Type: VA60 Number of Values: 1 Valids: RFC1321 MD5 = not yet calculated,RFC1321 MD5 = [0-9,a-f]{32} Data Source: PCF Description: MD5 fingerprint of the HDF product file. - Metadata Name: OperationalQualityFlag Mandatory: T Data Type: VA20 Number of Values: 1 Valids: Passed,Failed,Being Investigated,Not Investigated, Inferred Passed, Inferred Failed,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 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 Valids: Calibration,Diagnostic,Initialization,Launch,Normal,Roll,Routine,Safe,Solar Calibration,Standby,Survival,Test Data Source: PCF Description: Actual is "Test". - Metadata Name: OrbitNumber Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 1 Maximum Value: 999999 Data Source: L1B Description: The OMI orbit number. - Metadata Name: ParameterName Mandatory: T Data Type: VA40 Number of Values: 1 Valids: Total Column Bromine Oxide Data Source: PGE Description: > The measured science parameter expressed in the granule. - Metadata Name: PGEVERSION Mandatory: T Data Type: VA10 Number of Values: 1 Minimum Value: 0.0.0 Maximum Value: 9.9.99 Data Source: PCF Description: Actual is "2.0.2". - Metadata Name: ProductionDateTime Mandatory: T Data Type: DT Number of Values: 1 Minimum Value: 2003-01-01T00:00:00.000Z Maximum Value: 2099-12-31T24:59:59.999Z Data Source: TK Description: The date and time of the Level 2 processing. - Metadata Name: QAPercentMissingData Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: PGE Description: > The percent of the column data in the granule that are missing. - Metadata Name: QAPercentOutofBoundsData Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: PGE Description: > The percent of the retrieved column data in the granule that are out of bounds. - Metadata Name: RangeBeginningDate Mandatory: T Data Type: D Number of Values: 1 Minimum Value: 1995-01-01 Maximum Value: 2099-12-31 Data Source: L1B Description: The year, month and day when the granule began. - Metadata Name: RangeBeginningTime Mandatory: T Data Type: T Number of Values: 1 Minimum Value: 00:00:00.000000 Maximum Value: 23:59:59.999999 Data Source: L1B Description: > The hour, minute, second and fraction of a second when the granule began. - Metadata Name: RangeEndingDate Mandatory: T Data Type: D Number of Values: 1 Minimum Value: 1995-01-01 Maximum Value: 2099-12-31 Data Source: L1B Description: The year, month and day when the granule ended. - Metadata Name: RangeEndingTime Mandatory: T Data Type: T Number of Values: 1 Minimum Value: 00:00:00.000000 Maximum Value: 23:59:59.999999 Data Source: L1B Description: > The hour, minute, second and fraction of a second when the granule ended. - Metadata Name: REPROCESSINGACTUAL Mandatory: T Data Type: VA20 Number of Values: 1 Minimum Value: processed 1 time Maximum Value: processed 9999 times 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 Valids: no further update anticipated, further update anticipated, 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 Valids: Passed,Failed,Being Investigated,Not Investigated,Inferred Passed,Inferred Failed,Suspect Data Source: DP Description: Actual is "Not Investigated". - Metadata Name: ScienceQualityFlagExplanation Mandatory: T Data Type: VA255 Number of Values: 1 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 Valids: OMBRO Data Source: MCF Description: Actual is "OMBRO". - Metadata Name: SizeMBECSDataGranule Mandatory: F Data Type: LF Number of Values: 1 Minimum Value: 0.00e+00 Maximum Value: 1.00e+04 Data Source: DSS Description: > The volume of data contained in the granule in Mb (this Metadata will not appear in the granule). - Metadata Name: VersionID Mandatory: T Data Type: SI Number of Values: 1 Minimum Value: 000 Maximum Value: 999 Data Source: MCF Description: Actual is 1. Product Specific Attributes: - Metadata Name: EndBlockNr Mandatory: T Data Type: SI Number of Values: 1 to 500 Minimum Value: 1 Maximum Value: 50 Data Source: L1B Description: The number of the NOSE end block along the track. - Metadata Name: ExpeditedData Mandatory: T Data Type: VA10 Number of Values: 1 Valids: TRUE,FALSE Data Source: L1B Description: The indicator for expedited L0 data. - Metadata Name: ExposureTimes Mandatory: T Data Type: F Number of Values: 1 to 256 Minimum Value: 0.0 Maximum Value: 2000.0 Data Source: L1B Description: > An array containing the exposure times in seconds used for the measurements. - Metadata Name: InstrumentConfigurationIDs Mandatory: T Data Type: SI Number of Values: 1 to 256 Minimum Value: 0 Maximum Value: 255 Data Source: L1B Description: > An array containing the instrument configuration identifiers used for the measurements. - Metadata Name: MasterClockPeriods Mandatory: T Data Type: F Number of Values: 1 to 128 Minimum Value: 0.0 Maximum Value: 10.0 Data Source: L1B Description: > An array containing the master clock periods in seconds used for the measurements. - Metadata Name: NrEarthMeasurements Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: > The number of earth measurements in the granule (per output product). - Metadata Name: NrMeasurements Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: > The number of measurements in the granule (per output product). - Metadata Name: NrSolarMeasurements Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: > The number of solar measurements in the granule (per output product). - Metadata Name: NrSpatialZoom Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: The number of measurements in spatial zoom mode. - Metadata Name: NrSpectralZoom Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: The number of measurements in spectral zoom mode. - Metadata Name: NrZoom Mandatory: T Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 9999 Data Source: L1B Description: The number of measurements in zoom modes. - Metadata Name: QAStatPctGeolocationErrorUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 measurements for which the geolocation determination resulted in the GroudPixelQualityFlag for geolocation error being set. (Note the decrepancy of the field definition compared to Section 8.4 of the GDPS IODS Vol2 document, where this field is defined as not being split up for the single OMI channels.) - Metadata Name: QAStatPctMeasErrorUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 measurements with at least one of the following error flags set: the alternative engineering data flag, the co-adder error flag and the geolocation error flag. - Metadata Name: QAStatPctMeasWarningUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 measurements for which at least one of the MeasurementQualityFlags was set as a warning, excluding the alternative engineering data flag, the co-adder error flag and the geolocation error flag in the count. - Metadata Name: QAStatPctPixBadUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 image pixels with at least one of the following PixelQualityFlags set to indicate a bad pixel: the saturated ADC flag and the dead pixel flag. - Metadata Name: QAStatPctPixWarningUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 image pixels with at least one of the following PixelQualityFlags set as a warning: transient pixel, RTS pixel, saturation possibility, noise calculation, dark current, offset, exposure smear and stray light. - Metadata Name: QAStatPctProcessingErrorUV2 Mandatory: F Data Type: I Number of Values: 1 Minimum Value: 0 Maximum Value: 100 Data Source: L1B Description: > Percentage of UV2 image pixels with the processing error flag set. - Metadata Name: PathNr Mandatory: T Data Type: I Number of Values: 1 to 500 Minimum Value: 1 Maximum Value: 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 Valids: TRUE,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 Valids: TRUE,FALSE Data Source: L1B Description: > The indicator that during part of the measurements the spacecraft was in the SAA. - Metadata Name: SpacecraftManeuverFlag Mandatory: T Data Type: VA10 Number of Values: 1 Valids: TRUE,FALSE,UNKNOWN Data Source: L1B Description: > The indicator that during part of the measurements the spacecraft was performing a maneuver. - Metadata Name: StartBlockNr Mandatory: T Data Type: SI Number of Values: 1 to 500 Minimum Value: 1 Maximum Value: 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 Minimum Value: 0.0.0 Maximum Value: 9.9.99 Data Source: MCF Description: > The version of the ESDT descriptor file as determined by ECS. - Metadata Name: LongName Mandatory: T Data Type: VA80 Number of Values: 1 Valids: OMI/Aura Bromine Monoxide (BrO) Total Column 1-Orbit L2 Swath 13x24km Data Source: MCF Description: > Actual is "OMI/Aura Bromine Monoxide (BrO) Total Column 1-Orbit L2 Swath 13x24km" (see Section 7.0 of Reference 2). References: > 1. "OMI Algorithm Theoretical Basis Document, Volume IV, OMI Trace Gas Algorithms" (OMI-ATBD-VOL4, ATBD-OMI-04, Version 2.0, August 2002) 2. "HDF-EOS Aura File Format Guidelines" (OMI-AURA-DATA-GUIDE, Version 1.3, 16 October 2003) 3. "OMI Science Software Delivery Guide for Version 0.9" (OMI-SSDG-0.9.8, Version 0.9.8, 14 August 2003) 4. "OMI GDPS Input/Output Data Specification (IODS) Volume 2" (OMI-GDPS-IODS-2, SD-OMIE-7200-DS-467, 9 April 2003) 5. "Release 6A Implementation Earth Science Data Model for the ECS Project" (420-TP-022-002, June 2001) (http://edhs1.gsfc.nasa.gov/waisdata/rel6/html/tp4202202.html and http://edhs1.gsfc.nasa.gov/waisdata/rel6/html/tp42022_adds.html) 6. "OMI L2 - L4 Metadata Reference Guide" (3 July 2002) (https://omiwww.gsfc.nasa.gov/mlinda/OMImetadataRefGuide.html)