Product General Information:
ESDT ShortName: OMIAuraSO2
ESDT LongName: OMI/Aura TOMS SO2 Vertical Column 1-Orbit L2 Swath 13x24 km
PFS Version: 0.1.2
PFS Date: 2014-08-16
PFS Author: P. Leonard (ADNET)
App Version: 0.1.0
App Developers: P. Leonard (ADNET)
App Scientists: Nick Krotkov (NASA), P.K. Bhartia (NASA), Brad Fisher (SSAI), Can Li (ESSIC)
Product Overview: >
This document specifies the format for the OMIAuraSO2 Level 2 (L2) swath
product. The OMIAuraSO2 product provides SO2 column amount estimates
based on OMI (Ozone Monitoring Instrument) observations, and is tied to
the OMSO2 (Reference 1) and OMTO3 (Reference 2) products.
The OMIAuraSO2 product is stored as one HDF5 swath file for each granule
(i.e., one orbit) of OMSO2 L2 data, and has a size range of up to 40 Mb.
The Metadata in the product file are consistent with the MEaSUREs Metadata
requirements (References 3 and 4). The field names and dimension order are
inspired by the Aura File Format Guidelines document (Reference 5).
File-Level Attributes:
- attribute: AuthorAffiliation
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The affiliation of the author of the product. Actual is "NASA/GSFC".
- attribute: AuthorName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The name of the author of the product. Actual is "N. Krotkov, et al.".
- attribute: Conventions
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Metadata Conventions used. Actual is "CF-1.0".
- attribute: DayNightFlag
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The flag that indicates whether the product includes day-side observations, night-side observations, or both. Actual is "Day".
- attribute: EastBoundingCoordinate
mandatory: T
data_type: H5T_NATIVE_REAL
number_of_values: 1
valid_min: -180.0
valid_max: 180.0
description: >
The terrestrial longitude (in degrees) of the easternmost data in the granule.
- attribute: EquatorCrossingDate
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC year, month and day of the ascending equator crossing in the granule. Example is "2010-12-25".
- attribute: EquatorCrossingLongitude
mandatory: T
data_type: H5T_NATIVE_REAL
number_of_values: 1
valid_min: -180.0
valid_max: 180.0
description: >
The longitude of the ascending equator crossing in the granule.
- attribute: EquatorCrossingTime
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC hour, minute and second of the ascending equator crossing in the granule. Example is "12:00:00".
- attribute: GranuleDay
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 1
valid_max: 31
description: >
The UTC day of the month at the start of the granule.
- attribute: GranuleDayOfYear
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 1
valid_max: 366
description: >
The UTC day of the year at the start of the granule.
- attribute: GranuleMonth
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 1
valid_max: 12
description: >
The UTC month at the start of the granule.
- attribute: GranuleYear
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 2004
valid_max: 2020
description: >
The (four-digit) UTC year at the start of the granule.
- attribute: HDFVersion
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The version of HDF used to create the product. Example is "5-1.8.8".
- attribute: identifier_product_doi
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Digital Object Identifier. Actual is "10.5067/MEASURES/SO2/DATA201".
- attribute: identifier_product_doi_authority
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Digital Object Identifier. Actual is "http://dx.doi.org/".
- attribute: InputFilesHDF
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The OMSO2 input file used as input for the HDF-EOS5 to HDF5 conversion processing.
- attribute: InstrumentShortName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Short Name of the instrument. Actual is "OMI".
- attribute: LocalGranuleID
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The actual name of the product file. Example is "OMI-Aura_L2-OMIAuraSO2_2002m0630t2354-o21434_v03-00-2014m0915t123456.h5".
- attribute: LocalityValue
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The geographic locality of the product. Actual is "Global".
- attribute: LongName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The ESDT Long Name of the product. Actual is "OMI/Aura TOMS SO2 Vertical Column 1-Orbit L2 Swath 13x24 km".
- attribute: NorthBoundingCoordinate
mandatory: T
data_type: H5T_NATIVE_REAL
number_of_values: 1
valid_min: -90.0
valid_max: 90.0
description: >
The terrestrial latitude (in degrees) of the northernmost data in the granule.
- attribute: NumTimes
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 1
valid_max: 2000
description: >
The number of times in the granule, which is also the size of the nTimes dimension.
- attribute: OrbitNumber
mandatory: T
data_type: H5T_NATIVE_INTEGER
number_of_values: 1
valid_min: 1
valid_max: 99999
description: >
The OMI orbit number in the granule.
- attribute: ParameterName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The measured science parameter expressed in the granule. Actual is "Vertical Column Sulfur Dioxide".
- attribute: PGEVersion
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The version of the PGE or App that was used to create the product file. Example is "0.0.1".
- attribute: PlatformShortName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Short Name of the platform. Actual is "Aura".
- attribute: ProcessingCenter
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
valids: ACPS,OMIDAPS,TLCF
description: >
The processing center where the product was created. Example is "ACPS".
- attribute: ProcessLevel
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The process level of the product. Actual is "2".
- attribute: ProductionDateTimeHDF
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The date and time of the OMSO2 to HDF5 conversion processing. Example is "2013-03-15T12:34:56.0Z".
- attribute: ProductionDateTimeHE5
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The date and time of the OMSO2 processing. Example is "2012-12-31T12:34:56.0Z".
- attribute: ProductType
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The temporal type of the product. Actual is "L2 Swath".
- attribute: RangeBeginningDate
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC year, month and day when the granule began. Example is "2010-12-25".
- attribute: RangeBeginningTime
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC hour, minute and second when the granule began. Example is "12:00:00".
- attribute: RangeEndingDate
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC year, month and day when the granule ended. Example is "2010-12-26".
- attribute: RangeEndingTime
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The UTC hour, minute and second when the granule ended. Example is "13:00:00".
- attribute: SensorShortName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Short Name of the sensor. Actual is "CCD Ultra Violet".
- attribute: ShortName
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The ESDT Short Name of the product. Actual is "OMIAuraSO2".
- attribute: SouthBoundingCoordinate
mandatory: T
data_type: H5T_NATIVE_REAL
number_of_values: 1
valid_min: -90.0
valid_max: 90.0
description: >
The terrestrial latitude (in degrees) of the southernmost data in the granule.
- attribute: TAI93At0zOfGranule
mandatory: T
data_type: H5T_NATIVE_DOUBLE
number_of_values: 1
valid_min: -5.0e+09
valid_max: 1.0e+10
description: >
The TAI93 time (in continuous seconds since 12 a.m. UTC on January 1, 1993) at 0z of the L2G granule (see Section 6.1 of Reference 5).
- attribute: VersionID
mandatory: T
data_type: H5T_NATIVE_CHARACTER
number_of_values: 1
description: >
The Collection Version of the product. Example is "3.00".
- attribute: WestBoundingCoordinate
mandatory: T
data_type: H5T_NATIVE_REAL
number_of_values: 1
valid_min: -180.0
valid_max: 180.0
description: >
The terrestrial longitude (in degrees) of the westernmost data in the granule.
Dimensions:
- dimension: nCorners
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimension_type: FIXED
units: 1
long_name: Ground Pixel Corner
description: >
The dimension representing the ground pixel corners. There are four corners per ground pixel.
- dimension: nLayers
mandatory: T
data_type: H5T_NATIVE_REAL
dimension_type: FIXED
units: hPa
long_name: Pressure (Umkehr Layers 0 to 9 and Layers 10 Plus)
description: >
The dimension representing Umkehr layers 0 to 9 and layers 10 plus. The pressure corresponds to the bottom of the layer.
- dimension: nTimes
mandatory: T
data_type: H5T_NATIVE_DOUBLE
dimension_type: FIXED
units: seconds since 1993-01-01
long_name: Time
description: >
The dimension representing the observation times in the granule. The values are in TAI93 (time in continuous seconds since 12 a.m. UTC on January 1, 1993).
- dimension: nWavel
mandatory: T
data_type: H5T_NATIVE_REAL
dimension_type: FIXED
units: nm
long_name: TOMS Wavelength
description: >
The dimension representing the TOMS wavelengths. The values range from 305 to 380 nm.
- dimension: nXtrack
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimension_type: FIXED
units: 1
long_name: Cross-Track Position (1-Based)
description: >
The dimension representing the cross-track position of the observation in the "scan" line. The values range from 1 to 60.
ANCILLARY_DATA Group:
- dataset: CloudPressure
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 1013.25
_FillValue: -1.2676506e+30
units: hPa
long_name: Effective Cloud Pressure
description: >
The effective cloud pressure (in hPa) associated with the ground pixel (from OMCLDRR).
- dataset: TerrainHeight
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: -200
valid_max: 10000
_FillValue: -2147483647
units: m
long_name: Terrain Height
description: >
The terrain height (in m) at the center of the ground pixel (from the OMI Level 1B file).
- dataset: TerrainPressure
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_min: 1013.25
_FillValue: -1.2676506e+30
units: hPa
long_name: Terrain Pressure
description: >
The terrain pressure (in hPa) at the center of the ground pixel (from OMTO3).
GEOLOCATION_DATA Group:
- dataset: FoV75CornerLatitude
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nCorners,nXtrack,nTimes
valid_min: -90.0
valid_max: 90.0
_FillValue: -1.2676506e+30
units: degrees_north
long_name: "Corner Latitudes for 75% Field of View Pixels on the WGS-85 Ellipsoid (CCW relative to flight direction: LL,LR,UR,UL)"
description: >
The geodetic latitudes (in degrees) of the corner coordinates of the 75% Field of View (i.e., overlapping) ground pixels (from OMPIXCOR).
- dataset: FoV75CornerLongitude
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nCorners,nXtrack,nTimes
valid_min: -180.0
valid_max: 180.0
_FillValue: -1.2676506e+30
units: degrees_east
long_name: "Corner Longitudes for 75% Field of View Pixels on the WGS-85 Ellipsoid (CCW relative to flight direction: LL,LR,UR,UL)"
Description: >
The geodetic longitudes (in degrees) of the corner coordinates of the 75% Field of View (i.e., overlapping) ground pixels (from OMPIXCOR).
- dataset: GroundPixelQualityFlags
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 65534
_FillValue: -2147483647
units: 1
long_name: Ground Pixel Quality Flags
description: >
The ground pixel quality flags (for the ground pixel):
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 6 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 is reserved for future use (currently set to 0).
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 6 for more details.)
- dataset: Latitude
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -90.0
valid_max: 90.0
_FillValue: -1.2676506e+30
units: degrees_north
long_name: Latitude
description: >
The terrestrial latitude (in degrees) at the center of the ground pixel.
- dataset: Longitude
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -180.0
valid_max: 180.0
_FillValue: -1.2676506e+30
units: degrees_east
long_name: Longitude
description: >
The terrestrial longitude (in degrees) at the center of the ground pixel.
- dataset: RelativeAzimuthAngle
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -180.0
valid_max: 180.0
_FillValue: -1.2676506e+30
units: degrees_eastofnorth
long_name: Relative Azimuth Angle (sun + 180 - view)
description: >
The relative (sun + 180 - view) azimuth angle (in degrees) at the center of the ground pixel.
- dataset: SecondsInDay
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nTimes
valid_min: 0.0
valid_max: 86401.0
_FillValue: -1.2676506e+30
units: s
long_name: Seconds After UTC Midnight
description: >
The time (in s) after UTC midnight at the start of the observation.
- dataset: SolarAzimuthAngle
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -180.0
valid_max: 180.0
_FillValue: -1.2676506e+30
units: degrees_eastofnorth
long_name: Solar Azimuth Angle
Description: >
The solar azimuth angle (in degrees) at the center of the ground pixel.
- dataset: SolarZenithAngle
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 90.0
_FillValue: -1.2676506e+30
units: degrees
long_name: Solar Zenith Angle
description: >
The solar zenith angle (in degrees) at the center of the ground pixel.
- dataset: Time
mandatory: T
data_type: H5T_NATIVE_DOUBLE
dimensions: nTimes
valid_min: -5.0e+09
valid_max: 1.0e+10
_FillValue: -1.2676506002282294e+30
units: seconds since 1993-01-01
long_name: Time at Start of Scan (TAI93)
description: >
The TAI93 time (in continuous seconds since 12 a.m. UTC on January 1, 1993) of the start of the "scan".
- dataset: ViewingAzimuthAngle
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -180.0
valid_max: 180.0
_FillValue: -1.2676506e+30
units: degrees_eastofnorth
long_name: Viewing Azimuth Angle
description: >
The viewing azimuth angle (in degrees) at the center of the ground pixel.
- dataset: ViewingZenithAngle
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 70.0
_FillValue: -1.2676506e+30
units: degrees
long_name: Viewing Zenith Angle
description: >
The viewing zenith angle (in degrees) at the center of the ground pixel.
SCIENCE_DATA Group:
- dataset: AlgorithmFlag_PBL
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 12
_FillValue: -2147483647
units: 1
long_name: Algorithm Flag for PBL
description: >
The PBL processing flag for the retrieval indicating the algorithm path:
0 - skipped
1 - linear fitting, vertical column SO2, short wavelength window
2 - linear fitting, vertical column SO2, long wavelength window
Add 10 for snow/ice.
- dataset: AlgorithmFlag_STL
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 12
_FillValue: -2147483647
units: 1
long_name: Algorithm Flag for STL
description: >
The STL processing flag for the retrieval indicating the algorithm path:
0 - skipped
1 - linear fitting, vertical column SO2, short wavelength window
2 - linear fitting, vertical column SO2, long wavelength window
Add 10 for snow/ice.
- dataset: AlgorithmFlag_TRL
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 12
_FillValue: -2147483647
units: 1
long_name: Algorithm Flag for TRL
description: >
The TRL processing flag for the retrieval indicating the algorithm path:
0 - skipped
1 - linear fitting, vertical column SO2, short wavelength window
2 - linear fitting, vertical column SO2, long wavelength window
Add 10 for snow/ice.
- dataset: AlgorithmFlag_TRM
mandatory: T
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 12
_FillValue: -2147483647
units: 1
long_name: Algorithm Flag for TRM
description: >
The TRM processing flag for the retrieval indicating the algorithm path:
0 - skipped
1 - linear fitting, vertical column SO2, short wavelength window
2 - linear fitting, vertical column SO2, long wavelength window
Add 10 for snow/ice.
- dataset: ChiSquare
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 100.0
_FillValue: -1.2676506e+30
units: 1
long_name: Chi Square of the Fitting Residuals
description: >
The Chi square for STL from the linear least squares fit.
- dataset: ColumnAmountO3
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 50.0
valid_min: 700.0
_FillValue: -1.2676506e+30
units: DU
long_name: Best Total Ozone Solution
description: >
The best retrieved total ozone column amount from OMTO3.
- dataset: ColumnAmountSO2_PBL
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (PBL)
description: >
The retrieved vertical column amount SO2 with a boundary-layer SO2 profile averaged from in-situ aircraft measurments over the eastern United States.
- dataset: ColumnAmountSO2_PBL_TOMS
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (PBL-TOMS)
description: >
The retrieved vertical column amount SO2 with a boundary-layer SO2 profile averaged from in-situ aircraft measurments over the eastern United States based on the TOMS algorithm.
- dataset: ColumnAmountSO2_STL
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (STL)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 3 (roughly between 15 and 20 km altitude).
- dataset: ColumnAmountSO2_STL_TOMS
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (STL-TOMS)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 3 (roughly between 15 and 20 km altitude) based on the TOMS algorithm.
- dataset: ColumnAmountSO2_TRL
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (TRL)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 0 (roughly between 0 and 5 km altitude).
- dataset: ColumnAmountSO2_TRL_TOMS
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (TRL-TOMS)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 0 (roughly between 0 and 5 km altitude) based on the TOMS algorithm.
- dataset: ColumnAmountSO2_TRM
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (TRM)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 1 (roughly between 5 and 10 km altitude).
- dataset: ColumnAmountSO2_TRM_TOMS
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -10.0
valid_min: 2000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Vertical Column Amount SO2 (TRM-TOMS)
description: >
The retrieved vertical column amount SO2 with a prescribed SO2 profile similar to the standard ozone profile in Umkher layer 1 (roughly between 5 and 10 km altitude) based on the TOMS algorithm.
- dataset: deltaO3
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -1000.0
valid_min: 1000.0
_FillValue: -1.2676506e+30
units: DU
long_name: Ozone Adjustment from Least-Squares Fit
description: >
The ozone adjustment derived from the least-squares fitting method.
- dataset: deltaRefl
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -1.0
valid_min: 1.0
_FillValue: -1.2676506e+30
units: 1
long_name: Adjustment to Reflectivity at 331 nm
description: >
The reflectivity vs. wavelength is described by a second order polynomial, R = R331 + c1*(lambda-331) + c2 *(lambda-331)**2. The deltaRefl is the reflectivity adjustment to the zeroeth order term, R331.
- dataset: dN_dSO2_STL
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: 0.0
valid_min: 10.0
_FillValue: -1.2676506e+30
units: 1/DU
long_name: Umkehr Layer 3 SO2 Sensitivity Ratio, dN/dSO2
description: >
Umkehr Layer 3 SO2 sensitivity ratio, dN/dSO2.
- dataset: dN_dSO2_TRL
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: 0.0
valid_min: 10.0
_FillValue: -1.2676506e+30
units: 1/DU
long_name: Umkehr Layer 0 SO2 Sensitivity Ratio, dN/dSO2
description: >
Umkehr Layer 0 SO2 sensitivity ratio, dN/dSO2.
- dataset: dN_dSO2_TRM
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: 0.0
valid_min: 10.0
_FillValue: -1.2676506e+30
units: 1/DU
long_name: Umkehr Layer 1 SO2 Sensitivity Ratio, dN/dSO2
description: >
Umkehr Layer 1 SO2 sensitivity ratio, dN/dSO2.
- dataset: fc
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 1.0
_FillValue: -1.2676506e+30
units: 1
long_name: MLER Cloud Fraction
description: >
The MLER model effective cloud fraction parameter.
- dataset: LayerEfficiency
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nLayers,nXtrack,nTimes
valid_min: 0.0
valid_max: 10.0
_FillValue: -1.2676506e+30
units: 1
long_name: Algorithmic Layer Efficiency
description: >
The total ozone algorithmic efficiency Umkehr layers 0 to 9 and layers 10 plus.
- dataset: NValue
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: 0.0
valid_max: 600.0
_FillValue: -1.2676506e+30
units: 1
long_name: Measured N-Values
description: >
The measured N-values. N is defined as -100 times the logarithm of the ratio of the measured radiance to the solar irradiance.
- dataset: QualityFlags_PBL
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 8191
_FillValue: -2147483647
units: 1
long_name: Quality Flags for PBL
description: >
The quality flags PBL for the retrieval. Each bit corresponds to a flag that
is set to 0 for good value, or 1 for bad value:
Bit 0 - SO2 consistency flag (0 for SO2 from 3 pairs are consistent, 1 for not)
Bit 1 - geometric slant O3 column >= Threshold (currently set at 1500 D.U.)
Bit 2 - UV Aerosol Index > 3
Bit 3 - Reflectivity at 331 nm > 15%
Bit 4 to 6 together represents one number with a value ranging from 0 to 7, and
is equal to the first 4 bits of the OMTO3 QualityFlags.
Bit 7 - Descending
Bit 8 - reflectivity error
Bit 9 - geolocation error
Bit 10 - L1B warning, error, or missing
Bit 11 - set to be same as bit 6 of the OMTO3 QualityFlags
Bit 12 - set to be same as bit 7 of the OMTO3 QualityFlags
Bit 13 - place holder, set to zero currently
Bit 14 - place holder, set to zero currently
Bit 15 - place holder, set to zero currently
- dataset: QualityFlags_STL
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 8191
_FillValue: -2147483647
units: 1
long_name: Quality Flags for STL
description: >
The quality flags STL for the retrieval. Each bit corresponds to a flag that
is set to 0 for good value, or 1 for bad value:
Bit 0 - SO2 consistency flag (0 for SO2 from 3 pairs are consistent, 1 for not)
Bit 1 - geometric slant O3 column >= Threshold (currently set at 1500 D.U.)
Bit 2 - UV Aerosol Index > 3
Bit 3 - Reflectivity at 331 nm > 15%
Bit 4 to 6 together represents one number with a value ranging from 0 to 7, and
is equal to the first 4 bits of the OMTO3 QualityFlags.
Bit 7 - Descending
Bit 8 - reflectivity error
Bit 9 - geolocation error
Bit 10 - L1B warning, error, or missing
Bit 11 - set to be same as bit 6 of the OMTO3 QualityFlags
Bit 12 - set to be same as bit 7 of the OMTO3 QualityFlags
Bit 13 - place holder, set to zero currently
Bit 14 - place holder, set to zero currently
Bit 15 - place holder, set to zero currently
- dataset: QualityFlags_TRL
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 8191
_FillValue: -2147483647
units: 1
long_name: Quality Flags for TRL
description: >
The quality flags TRL for the retrieval. Each bit corresponds to a flag that
is set to 0 for good value, or 1 for bad value:
Bit 0 - SO2 consistency flag (0 for SO2 from 3 pairs are consistent, 1 for not)
Bit 1 - geometric slant O3 column >= Threshold (currently set at 1500 D.U.)
Bit 2 - UV Aerosol Index > 3
Bit 3 - Reflectivity at 331 nm > 15%
Bit 4 to 6 together represents one number with a value ranging from 0 to 7, and
is equal to the first 4 bits of the OMTO3 QualityFlags.
Bit 7 - Descending
Bit 8 - reflectivity error
Bit 9 - geolocation error
Bit 10 - L1B warning, error, or missing
Bit 11 - set to be same as bit 6 of the OMTO3 QualityFlags
Bit 12 - set to be same as bit 7 of the OMTO3 QualityFlags
Bit 13 - place holder, set to zero currently
Bit 14 - place holder, set to zero currently
Bit 15 - place holder, set to zero currently
- dataset: QualityFlags_TRM
data_type: H5T_NATIVE_INTEGER
dimensions: nXtrack,nTimes
valid_min: 0
valid_max: 8191
_FillValue: -2147483647
units: 1
long_name: Quality Flags for TRM
description: >
The quality flags TRM for the retrieval. Each bit corresponds to a flag that
is set to 0 for good value, or 1 for bad value:
Bit 0 - SO2 consistency flag (0 for SO2 from 3 pairs are consistent, 1 for not)
Bit 1 - geometric slant O3 column >= Threshold (currently set at 1500 D.U.)
Bit 2 - UV Aerosol Index > 3
Bit 3 - Reflectivity at 331 nm > 15%
Bit 4 to 6 together represents one number with a value ranging from 0 to 7, and
is equal to the first 4 bits of the OMTO3 QualityFlags.
Bit 7 - Descending
Bit 8 - reflectivity error
Bit 9 - geolocation error
Bit 10 - L1B warning, error, or missing
Bit 11 - set to be same as bit 6 of the OMTO3 QualityFlags
Bit 12 - set to be same as bit 7 of the OMTO3 QualityFlags
Bit 13 - place holder, set to zero currently
Bit 14 - place holder, set to zero currently
Bit 15 - place holder, set to zero currently
- dataset: RadiativeCloudFraction
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: 0.0
valid_max: 1.0
_FillValue: -1.2676506e+30
units: 1
long_name: Radiative Cloud Fraction = fc*lc331/lm331
Description: >
The radiative cloud fraction (= fc * lc331 / lm331) associated with the retrieval.
- dataset: Reflectivity331
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -15.0
valid_max: 115.0
_FillValue: -1.2676506e+30
units: "%"
long_name: Effective Surface Reflectivity at 331 nm
description: >
Effective surface reflectivity of the surface at 331 nm associated with the retrieval.
- dataset: Residual
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: -150.0
valid_max: 150.0
_FillValue: -1.2676506e+30
units: 1
long_name: N-Value Residual
description: >
The N-value residuals from OMTO3.
- dataset: ResidualAdjustment
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel,nXtrack,nTimes
valid_min: -50.0
valid_max: 50.0
_FillValue: -1.2676506e+30
units: 1
long_name: N-Value Residual Adjustment
description: >
The N-value adjustment made to OMTO3 residuals.
- dataset: Rlambda1st
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -1.0
valid_max: 1.0
_FillValue: -1.2676506e+30
units: 1
long_name: First Order Term of R-Lambda Function
description: >
The reflectivity vs. wavelength is described by a second order polynomial, R = R331 + c1*(lambda-331) + c2 *(lambda-331)**2. Rlambda1st is the first order coefficient c1.
- dataset: Rlambda2nd
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -1.0
valid_max: 1.0
_FillValue: -1.2676506e+30
units: 1
long_name: Second Order Term of R-Lambda Function
description: >
The reflectivity vs. wavelength is described by a second order polynomial, R = R331 + c1*(lambda-331) + c2 *(lambda-331)**2. Rlambda2nd is the second order coefficient c2.
- dataset: UVAerosolIndex
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nXtrack,nTimes
valid_min: -50.0
valid_max: 50.0
_FillValue: -1.2676506e+30
units: 1
long_name: UV Aerosol Index
description: >
The UV aerosol index associated with the retrieval.
SENSOR_DATA Group:
- dataset: Wavelength
mandatory: T
data_type: H5T_NATIVE_REAL
dimensions: nWavel
valid_min: 300.0
valid_max: 400.0
_FillValue: -1.2676506e+30
units: nm
long_name: TOMS Wavelengths
description: >
The TOMS wavelengths. There are twelve wavelengths that range from 308 to 373 nm.
Core Metadata: None.
Product Specific Attributes: None.
Archived Metadata: None.
References: >
1. "OMSO2 README File"
(18 August 2008)
(http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI/omso2_v003.shtml)
2. "OMTO3 README File"
(3 April 2012)
(http://disc.sci.gsfc.nasa.gov/Aura/data-holdings/OMI/omto3_v003.shtml)
3. "ICD Between GES DISC S4PA and Multi-Decadal Sulfur Dioxide Climatology from Satellite Instruments/Nickolay Krotkov"
Prepared by James Johnson
Revised December 31, 2013
4. "MEaSUREs Data at the GES DISC: Recommendations to Data Providers"
Prepared by Dana Ostrenga, James Johnson, and Bruce Vollmer
Revised June 27, 2011
5. "A File Format for Satellite Atmospheric Chemistry Data Based on Aura File Format Guidelines"
Craig, C., Veefkind, P., Leonard, P., Wagner, P., Vuu, C., and Shepard, D.
ESDS-RCF-009, May 2008
http://www.esdswg.org/spg/rfc/esds-rfc-009/ESDS-RFC-009.pdf/view
6. "OMI GDPS Input/Output Data Specification (IODS) Volume 2"
(OMI-GDPS-IODS-2, SD-OMIE-7200-DS-467, 9 April 2003)
