---
MShortname: OMHCHO
Longname: OMI/Aura Formaldehyde (HCHO) Total Column 1-Orbit L2 Swath
13x24km
PFS Version: 1.0.0b
Date: 01 December 2006
Author(s): Thomas P. Kurosu (SAO)
PGE Version: 1.0.0
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 1.0.0 delivery
of the OMHCHO L2 PGE, which uses a Basic Optical Absorption Spectroscopy
(BOAS) type algorithm based on non-linear least squares fitting to estimate
total column Hcho 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: 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 successful.
- 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 twice the
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: NumberOfSuspectInputSamples
Mandatory: T
Data Type: HE5T_NATIVE_INT
Number of Values: 1
Minimum Value: 0
Maximum Value: 2147483647
Data Source: PGE
Description: Number of suspect measurement pixels in granule
- 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 failed retrieved pixels in granule, i.e., eiter
"failed to coverge" nor "out of bounds".
- 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 successfully retrieved pixels in granule, i.e.,
neiter "failed to coverge" nor "out of bounds".
- Metadata Name: PercentOutOfBoundsSamples
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 "out of bounds" pixels in granule, i.e., those
for which the retrieved column is negative within twice the
fitting uncertainties.
- 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 "1.0.0".
- 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 HCHO
Data Source: PGE
Description: Actual is "OMI Total Column Amount HCHO".
- 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: nCharLenFitElements
Data Type: HE5T_NATIVE_INT
Dimension Type: FIXED
Number of Values: 1
Minimum Value: 0
Maximum Value: 256
Data Source: L1B
Description: >
The length of the string describing the fitting elements.
Varied elements only (see also "nFitElements" and
"FittingParameterNames").
- Dimension Name: nFitElements
Data Type: HE5T_NATIVE_INT
Dimension Type: FIXED
Number of Values: 1
Minimum Value: 0
Maximum Value: 9999
Data Source: PGE
Description: The number of elements varied in the fitting process.
- 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: nWavCalPars
Data Type: HE5T_NATIVE_INT
Dimension Type: FIXED
Number of Values: 1
Minimum Value: 0
Maximum Value: 9999
Data Source: PGE
Description: The number of wavelength calibration parameters in
the fit
- 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_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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, clouds, and vertical distribution of HCHO.
- 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 many 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_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: 1.0e+00
Maximum Value: 9.9e+99
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: AirMassFactorO3
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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, based on
the OMCLDRR O3-optimized cloud data fields CloudFractionforO3 and
CloudPressureforO3.
- Field Name: AirMassFactorO3DiagnosticFlag
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 AirMassFactorO3
for each ground pixel. See description of AirMassFactorDiagnosticFlag.
- Field Name: AverageColumnAmount
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: 1
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
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: 9.9e+99
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: 9.9e+99
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: -9.9e+99
Maximum Value: 9.9e+99
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: -9.9e+99
Maximum Value: 9.9e+99
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 destriping correction. This correction is computed
as CrossTrackStripeFit*CrossTrackStripeCorrection, which is subtracted
from ColumnAmount to derive ColumnAmountDestriped.
- Field Name: ColumnUncertainty
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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: CrossTrackStripeCorrection
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: molec/cm2
Data Source: PGE
Title: "Correction Factor for Cross Track Stripes"
Unique Field Definition: OMI-Specific
Description: >
This correction is multiplied by CrossTrackStripeFit and subtracted
from ColumnAmount to derive ColumAmountDestriped.
- Field Name: CrossTrackStripeFit
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nTimes
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: molec/cm2
Data Source: PGE
Title: "Fit Parameter of Cross Track Factor"
Unique Field Definition: OMI-Specific
Description: >
Amount of CrossTrackStripeCorrection in ColumAmount that has been
removed to derive ColumnAmountDestriped.
- Field Name: EffectiveSolarZenithAngle
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: PGE
Title: "Effective Solar Zenith Angle"
Unique Field Definition: OMI-Specific
Description: >
Effective solar zenith angle (in deg), constructed such that
its Cosine equals the sum of Cosines of the solar zenith angle
and the viewing zenith angle.
- 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<n or n<=0 or m<=0 or mdc<m or mdw<n*n+5*n+3*m+6 or
maxit<=0 or epsrel<0 or epsabs<0 or epsx<0 or invalid starting
point on entry
= -2 termination due to criterion no. 5
= -3 termination due to criterion no. 6
= -4 termination due to criterion no. 7
= -5 termination due to criterion no. 8
= -6 termination due to criterion no. 9
= -7 there is only one feasible point, namely x(i)=bl(i)=bu(i) ;
i=1,2,...,n
= -11 termination due to user stop indicator: fitting parameters out
of bounds
= -12 termination due to user stop indicator: "infinite loop"
termination
The convergence criteria are:
1) relative predicted reduction in the objective function is less
than epsrel**2
2) the sum of squares is less than epsabs**2
3) the relative change in x is less than epsx
4) we are computing at noise level the last digit in the convergence
code (see below) indicates how the last steps were computed
= 0 no trouble (gauss-newton the last 3 steps)
= 1 prank<n at the termination point
= 2 the method of newton was used (at least) in the last step
= 3 the 2nd but last step was subspace minimization but the last
two were gauss-newton steps
= 4 the steplength was not unit in both the last two steps
The abnormal termination criteria are:
5) no. of iterations has exceeded maximum allowed iterations
6) the hessian emanating from 2nd order method is not pos def
7) the algorithm would like to use 2nd derivatives but is not allowed
to do that
8) an undamped step with newtons method is a failure
9) the latest search direction computed using subspace minimization
was not a descent direction (probably caused by wrongly computed
jacobian)
The convergence constants and dimension parameters are:
maxit maximum number of allowed iterations
tol pseudo rank tolerance constant
epsrel relative convergence constant
epsabs absolute convergence constant
epsx parameter convergence constant
n integer scalar containing the number of unknowns
mdc integer scalar (mdc must be >= m)
m integer scalar containing the number of data points
- Field Name: FittingParameterColumns
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nFitElements,nXtrack,nTimes
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Colum Values of all Fitting Parameters"
Unique Field Definition: OMI-Specific
Description: >
Columns values of all fitting parameters varied in the fit. Check
FittingParameterNames for the list of parameters.
- Field Name: FittingParameterCorrelations
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nFitElements,nXtrack,nTimes
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Correlations with Main Fitting Parameter"
Unique Field Definition: OMI-Specific
Description: >
Off-diagonal elements of the covariance matrix for the main fitting
parameter, specifying correlations between the fitting elements
varied during the retrieval process and the main target. Check
FittingParameterNames for the list of parameters.
- Field Name: FittingParameterNames
Data Type: HE5T_NATIVE_CHAR
Dimensions: nCharLenFitElements
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Names of all Fitting Parameters"
Unique Field Definition: OMI-Specific
Description: >
Names of the elements included in the FittingParameterColumns,
FittingParameterCorrealtions, and FittingParameterUncertainty arrays,
separated by commas (',').
- Field Name: FittingParameterUncertainty
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nFitElements,nXtrack,nTimes
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Uncertainties of all Fitting Parameters"
Unique Field Definition: OMI-Specific
Description: >
Uncertainties of the columns values of all fitting parameters given in
FittingParameterColumns. Check FittingParameterNames for the list of
parameters.
- Field Name: FittingRMS
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack,nTimes
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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: IterationCount
Data Type: HE5T_NATIVE_INT16
Dimensions: nXtrack,nTimes
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Fit Iteration Count"
Unique Field Definition: OMI-Specific
Description: >
Number of calls to the ELSUNC fitting routine until convergence of fit.
Must be checked against value of FitConvergenceFlag to assure that the
number of iterations did not exceed the maximum number of allowed
iterations.
- Field Name: MainDataQualityFlag
Data Type: HE5T_NATIVE_INT16
Dimensions: nXtrack,nTimes
Minimum Value: -1
Maximum Value: 2
Missing Value: -1
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.
= -1 No column values have been computed; entries are missing.
= 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 1sigma fitting uncertainty is < 0.0
(c) AMF was reset to high value because of high cloud cover,
creating a column of effectively 0.0 (OMHCHO only)
= 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 2sigma fitting uncertainty is < 0.0
- Field Name: PixelCornerLatitudes
Data Type: HE5T_NATIVE_FLOAT
Dimensions: nXtrack+1,nTimes+1
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: 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: -9.9e+99
Maximum Value: 9.9e+99
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 in the reference swath line.
- Field Name: RadianceReferenceColumnUncertainty
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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 in the reference swath line.
- Field Name: RadianceReferenceConvergenceFlag
Data Type: HE5T_NATIVE_INT16
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 reference swath line.
For a detailed description of the flag refer to FitConvergenceFlag.
- Field Name: RadianceReferenceFit
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nWavCalPars,nXtrack
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Reference Fit"
Unique Field Definition: OMI-Specific
Description: >
Fitting parameters for radiance reference ("non-gases"). The individual
parameters are
Radiance Reference Fit Baseline 0th Order
Radiance Reference Fit Baseline 1st Order
Radiance Reference Fit Baseline 2nd Order
Radiance Reference Fit Baseline 3rd Order
Radiance Reference Fit Scaling 0th Order
Radiance Reference Fit Scaling 1st Order
Radiance Reference Fit Scaling 2nd Order
Radiance Reference Fit Scaling 3rd Order
Radiance Reference Fit Solar Intensity
Radiance Reference Fit Slit Width at 1/e (in nm)
Radiance Reference Fit Slit Asymmetry
Radiance Reference Fit Wavelength Shift (in nm)
Radiance Reference Fit Wavelength Squeeze
- Field Name: RadianceReferenceFittingRMS
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nXtrack
Minimum Value: 0.0e+00
Maximum Value: 9.9e+99
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 in the radiance reference line.
- Field Name: RadianceReferenceIterationCount
Data Type: HE5T_NATIVE_INT16
Dimensions: nXtrack
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Reference Fit Iteration Count"
Unique Field Definition: OMI-Specific
Description: >
Number of iterations until convergence for the radiance reference fit.
- Field Name: RadianceReferenceScanLineNumber
Data Type: HE5T_NATIVE_INT16
Dimensions: 1
Minimum Value: -1
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Reference Fit Scanline Number"
Unique Field Definition: OMI-Specific
Description: >
Scan line number for radiance reference fit performed before the
processing of the whole granule. Usually around the equator, and
usually equal to the scan line number of the radiance wavelength
calibration. Used mainly to pre-determine bad CCD pixels to be
excluded from the radiance fitting window.
- Field Name: RadianceWavCalConvergenceFlag
Data Type: HE5T_NATIVE_INT16
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: RadianceWavCalFit
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nWavCalPars,nXtrack
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Wavelength Calibration Fit"
Unique Field Definition: OMI-Specific
Description: >
Fitting parameters for wavelength calibration ("non-gases"). The
individual parameters are
Radiance Wavelength Calibration Baseline 0th Order
Radiance Wavelength Calibration Baseline 1st Order
Radiance Wavelength Calibration Baseline 2nd Order
Radiance Wavelength Calibration Baseline 3rd Order
Radiance Wavelength Calibration Scaling 0th Order
Radiance Wavelength Calibration Scaling 1st Order
Radiance Wavelength Calibration Scaling 2nd Order
Radiance Wavelength Calibration Scaling 3rd Order
Radiance Wavelength Calibration Solar Intensity
Radiance Wavelength Calibration Slit Width at 1/e (in nm)
Radiance Wavelength Calibration Slit Asymmetry
Radiance Wavelength Calibration Wavelength Shift (in nm)
Radiance Wavelength Calibration Wavelength Squeeze
- Field Name: RadianceWavCalIterationCount
Data Type: HE5T_NATIVE_INT16
Dimensions: nXtrack
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Wavelength Calibration Iteration
Count"
Unique Field Definition: OMI-Specific
Description: >
Number of iterations until convergence for the radiance wavelength
calibration.
- Field Name: RadianceWavCalScanLineNumber
Data Type: HE5T_NATIVE_INT16
Dimensions: 1
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Radiance Wavelength Calibration Scanline
Number"
Unique Field Definition: OMI-Specific
Description: >
Scan line number used for radiance wavelength calibration.
- Field Name: SolarWavCalConvergenceFlag
Data Type: HE5T_NATIVE_INT16
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.
- Field Name: SolarWavCalFit
Data Type: HE5T_NATIVE_DOUBLE
Dimensions: nWavCalPars,nXtrack
Minimum Value: -9.9e+99
Maximum Value: 9.9e+99
Missing Value: -1.0e+30
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: "Solar Wavelength Calibration Fit"
Unique Field Definition: OMI-Specific
Description: >
Fitting parameters for wavelength calibration ("non-gases"). The
individual parameters are
Solar Wavelength Calibration Baseline 0th Order
Solar Wavelength Calibration Baseline 1st Order
Solar Wavelength Calibration Baseline 2nd Order
Solar Wavelength Calibration Baseline 3rd Order
Solar Wavelength Calibration Scaling 0th Order
Solar Wavelength Calibration Scaling 1st Order
Solar Wavelength Calibration Scaling 2nd Order
Solar Wavelength Calibration Scaling 3rd Order
Solar Wavelength Calibration Solar Intensity
Solar Wavelength Calibration Slit Width at 1/e (in nm)
Solar Wavelength Calibration Slit Asymmetry
Solar Wavelength Calibration Wavelength Shift (in nm)
Solar Wavelength Calibration Wavelength Squeeze
- Field Name: SolarWavCalIterationCount
Data Type: HE5T_NATIVE_INT16
Dimensions: nXtrack
Minimum Value: 0
Maximum Value: 32767
Missing Value: -30000
Offset: 0.0e+00
Scale Factor: 1.0e+00
Units: NoUnits
Data Source: PGE
Title: ""
Unique Field Definition: OMI-Specific
Description: >
Number of iterations until convergence for the solar wavelength
calibration
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 >= 80% of NrofGoodInputSamples
(2) "Suspect" if NrofGoodOutputSamples >= 50% but < 80% 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
("GOMI-ERS2_L1-OML1BRUG_20010707150-o32487.he4",
"GOMI-ERS2_L1-OML1BIRR_20010707150-o32487.he4", "", "",
" ", "", "", "", "", "", "", "", "", "", "", "", "", "", "", "")
- Metadata Name: LocalGranuleID
Mandatory: T
Data Type: VA80
Number of Values: 1
Minimum Value: OMI-Aura_L1-OMTO3_1995m0101t0000-o00000_v001-1995m0101t000000.he5
Maximum Value: OMI-Aura_L1-OMTO3_2099m1231t2359-o99999_v999-2099m1231t235959.he5
Data Source: PGE
Description: >
Example is
"OMI-Aura_L1-OMTO3_2002m0630t2354-o21434_v001-2003m0515t181917.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 Formaldehyde
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 "1.0.0".
- 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 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 data in the granule that are out of bounds data.
- 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: OMHCHO
Data Source: MCF
Description: Actual is "OMHCHO".
- 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 Formaldehyde (HCHO) Total Column 1-Orbit L2
Swath 13x24km
Data Source: MCF
Description: >
Actual is
"OMI/Aura Formaldehyde (HCHO) 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.htmlhttps://omiwww.gsfc.nasa.gov/mlinda/OMImetadataRefGuide.html)
