Lead Algorithm Scientist: Pawan K. Bhartia (NASA/GSFC) Lead Algorithm Developer: Charles Wellemeyer (SSAI) Lead PGE Developer: Kai Yang (SSAI)

Transcription

1 Shortname: OMO3 Longname: OM/Aura Ozone (O3) otal Column 1-Orbit L2 Swath 13x24km PS Version: Date: 8 October 2004 Author(s): Kai Yang (SSA), Peter Leonard (SSA) Version: and newer Lead Algorithm Scientist: Pawan K. Bhartia (NASA/GSC) Lead Algorithm Developer: Charles Wellemeyer (SSA) Lead Developer: Kai Yang (SSA) Developer(s): Shifang Luo (SSA) his document specifies the product format for the OMO3 Level 2, which uses the V8 OMS algorithm to estimate total column ozone from OM UV-2 measurements (Reference 1). he product is stored as one HD-EOS 5 swath file for each granule (i.e., one orbit) of OM Level 1B data, and has a size range of 5 to 500 Mb. Global Metadata: - Metadata Name: AuthorAffiliation HE5_NAVE_CHAR NASA/GSC PC Description: Example is "NASA/GSC". - Metadata Name: AuthorName HE5_NAVE_CHAR U.S. OM Science eam PC Description: Example is "U.S. OM Science eam". - Metadata Name: GranuleDay HE5_NAVE_N Minimum Value: 1 Maximum Value: 31 Description: he day of the month at the start of the granule. - Metadata Name: GranuleMonth HE5_NAVE_N Minimum Value: 1 Maximum Value: 12

2 Description: he month at the start of the granule. - Metadata Name: GranuleYear HE5_NAVE_N Minimum Value: 2000 Maximum Value: 2099 Description: he (four-digit) year at the start of the granule. - Metadata Name: HDEOSVersion HE5_NAVE_CHAR HE Description: Example is "HDEOS_5.1.5". - Metadata Name: nputversions HE5_NAVE_CHAR A list of every ESD (including version) whose product was used as input for the processing. - Metadata Name: nstrumentname HE5_NAVE_CHAR OM PC Description: Actual is "OM" (see Section 6.1 of Reference 2). - Metadata Name: OrbitData HE5_NAVE_CHAR DENVE,PREDCED L1B ndicates whether orbit data used by the Level 1B processor is definitive or predicted. - Metadata Name: VERSON HE5_NAVE_CHAR PC Description: Example is "0.9.33" (see Appendix K of Reference 3).

3 - Metadata Name: ProcessingCenter HE5_NAVE_CHAR OMDAPS,LC PC Description: Example is "OMDAPS". - Metadata Name: ProcessingHost HE5_NAVE_CHAR PC he output from executing the Unix "uname -a" command on the processing machine. - Metadata Name: ProcessLevel HE5_NAVE_CHAR 2 PC Description: Actual is "2". - Metadata Name: A93At0zOfGranule HE5_NAVE_DOUBLE.0 Maximum Value: 1.0e+30 he A93 time at 0z of the granule (see Section 6.1 of Reference 2). - Metadata Name: WavelengthOfAdjustment HE5_NAVE_LOA Number of Values: 6 Minimum Value: Maximum Value: he wavelengths at which the N-Value adjustments occur. - Metadata Name: NVXAdjustment HE5_NAVE_LOA Number of Values: 360 Minimum Value: Maximum Value: 5.0

4 he N-Value adjustments for the 6 wavelengths and 60 cross-track scan positions. Swath Metadata: - Metadata Name: EarthSunDistance HE5_NAVE_LOA Minimum Value: 1.47e+11 Maximum Value: 1.53e+11 L1B he Earth-sun distance (in m) at the time of the irradiance measurement. - Metadata Name: Numimes HE5_NAVE_N Maximum Value: 9999 L1B Description: he number of "scan" lines in the swath. - Metadata Name: NumimesSmallPixel HE5_NAVE_N Maximum Value: 9999 L1B Description: he number of small pixel "scan" lines in the swath. - Metadata Name: SwathName HE5_NAVE_CHAR OM Column Amount O3 Description: Actual is "OM Column Amount O3". - Metadata Name: VerticalCoordinate HE5_NAVE_CHAR otal Column Description: Actual is "otal Column" (see Section 6.2 of Reference 2). Swath

5 - Dimension Name: nlayers HE5_NAVE_N Dimension ype: XED Minimum Value: 1 Maximum Value: 11 Description: he number of layers in the ozone profile per ground pixel. - Dimension Name: nimes HE5_NAVE_N Dimension ype: XED Maximum Value: 9999 L1B Description: he number of "scan" lines in the swath. - Dimension Name: nimessmallpixel HE5_NAVE_N Dimension ype: XED Maximum Value: 9999 L1B Description: he number of small pixel "scan" lines in the swath. - Dimension Name: nwavel HE5_NAVE_N Dimension ype: XED Minimum Value: 1 Maximum Value: 500 Description: he number of wavelengths per ground pixel. - Dimension Name: nxtrack HE5_NAVE_N Dimension ype: XED Minimum Value: 1 Maximum Value: 60 L1B Description: he number of ground pixels per "scan" line. Geolocation ields: - ield Name: GroundPixelQualitylags HE5_NAVE_UN16 nxtrack,nimes

6 Maximum Value: Scale actor: 1.0 NoUnits L1B itle: Ground Pixel Quality lags Unique ield Definition: OMS-OM-Shared 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 not used 15 - error flag for land/water Bits 4 to 6 are flags that are set to 0 for ALSE, or 1 for RUE: 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 NSE): 0 - snow-free land sea ice concentration (percent) permanent ice (Greenland, Antarctica) not used dry snow ocean (NSE-255) reserved for future use mixed pixels at coastline (NSE-252) suspect ice value (NSE-253) corners undefined (NSE-254) error Bit 15 - NSE nearest neighbor filling flag. (See Section 6.2 of Reference 4 for more details.) - ield Name: Latitude HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: 90.0 Scale actor: 1.0 deg L1B

7 itle: Geodetic Latitude Unique ield Definition: OMS-Aura-Shared he geodetic latitude (in deg) at the center of the ground pixel. - ield Name: Longitude HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 deg L1B itle: Geodetic Longitude Unique ield Definition: OMS-Aura-Shared he geodetic longitude (in deg) at the center of the ground pixel. - ield Name: RelativeAzimuthAngle HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 deg(eastofnorth) L1B itle: Relative Azimuth Angle (sun view) Unique ield Definition: OMS-OM-Shared he relative (sun view) azimuth angle (in deg) at the center of the ground pixel. - ield Name: SecondsnDay HE5_NAVE_LOA nimes.0 Maximum Value: Scale actor: 1.0 s L1B itle: Seconds after UC midnight Unique ield Definition: OMS-Aura-Shared he time (in s) after UC midnight at the start of the "scan". - ield Name: SolarAzimuthAngle HE5_NAVE_LOA

8 nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 deg(eastofnorth) L1B itle: Solar Azimuth Angle Unique ield Definition: OMS-Aura-Shared he solar azimuth angle (in deg) at the center of the ground pixel. - ield Name: SolarZenithAngle HE5_NAVE_LOA nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 deg L1B itle: Solar Zenith Angle Unique ield Definition: OMS-Aura-Shared he solar zenith angle (in deg) at the center of the ground pixel. - ield Name: SpacecraftAltitude HE5_NAVE_LOA nimes Minimum Value: 4.0e+05 Maximum Value: 9.0e+05 Scale actor: 1.0 m L1B itle: Spacecraft Altitude Unique ield Definition: OMS-Aura-Shared Description: Height above WGS84 ellipsoid. - ield Name: SpacecraftLatitude HE5_NAVE_LOA nimes Minimum Value: Maximum Value: 90.0 Scale actor: 1.0 deg L1B itle: Spacecraft Latitude Unique ield Definition: OMS-Aura-Shared

9 Description: Geodetic latitude above WGS84 ellipsoid. - ield Name: SpacecraftLongitude HE5_NAVE_LOA nimes Minimum Value: Maximum Value: Scale actor: 1.0 deg L1B itle: Spacecraft Longitude Unique ield Definition: OMS-Aura-Shared Description: Geodetic longitude above WGS84 ellipsoid. - ield Name: errainheight HE5_NAVE_N16 nxtrack,nimes Minimum Value: -200 Maximum Value: Scale actor: 1.0 m L1B itle: errain Height Unique ield Definition: OMS-Aura-Shared he terrain height (in m) at the center of the ground pixel (from the OM Level 1B file). - ield Name: ime HE5_NAVE_DOUBLE nimes Minimum Value: -5.0e+09 Maximum Value: 1.0e e+30 Scale actor: 1.0 s L1B itle: ime at Start of Scan (A93) Unique ield Definition: OMS-Aura-Shared Description: he A93 time (in s) at the start of the "scan". - ield Name: ViewingAzimuthAngle HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: 180.0

10 Scale actor: 1.0 deg(eastofnorth) L1B itle: Viewing Azimuth Angle Unique ield Definition: OMS-OM-Shared he viewing azimuth angle (in deg) at the center of the ground pixel. - ield Name: ViewingZenithAngle HE5_NAVE_LOA nxtrack,nimes.0 Maximum Value: 70.0 Scale actor: 1.0 deg L1B itle: Viewing Zenith Angle Unique ield Definition: OMS-OM-Shared he viewing zenith angle (in deg) at the center of the ground pixel. Data ields: - ield Name: Algorithmlags HE5_NAVE_UN8 nxtrack,nimes Maximum Value: Scale actor: 1.0 NoUnits itle: Algorithm lags Unique ield Definition: OMS-OM-Shared he algorithm flag associated with the ground pixel: 0 - skipped 1 - standard 2 - adjusted for profile shape 3 - based on C-pair (331 and 360 nm) Add 10 for snow/ice. - ield Name: APrioriLayerO3 HE5_NAVE_LOA nlayers,nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 DU

11 itle: A Priori Ozone Profile Unique ield Definition: OMS-OM-Shared Description: he apriori layer ozone values. - ield Name: Cloudraction HE5_NAVE_LOA nxtrack,nimes.0 Maximum Value: 1.0 Scale actor: 1.0 NoUnits itle: Effective Cloud raction Unique ield Definition: OMS-OM-Shared Description: he effective cloud fraction. - ield Name: CloudopPressure HE5_NAVE_LOA nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 hpa itle: Cloud op Pressure Unique ield Definition: OMS-OM-Shared he cloud top pressure (in hpa) associated with the ground pixel. - ield Name: ColumnAmountO3 HE5_NAVE_LOA nxtrack,nimes Minimum Value: 50.0 Maximum Value: Scale actor: 1.0 DU itle: Best otal Ozone Solution Unique ield Definition: OMS-OM-Shared he best total ozone solution (in DU) associated with the ground pixel. - ield Name: dn_dr HE5_NAVE_LOA nwavel,nxtrack,nimes Minimum Value:

12 Maximum Value: 0.0 Scale actor: 1.0 NoUnits itle: Reflectivity Sensitivity Ratio, dn/dr Unique ield Definition: OMS-OM-Shared Description: he reflectivity sensitivity ratio, dn/dr. - ield Name: dn_d HE5_NAVE_LOA nwavel,nxtrack,nimes.0 Maximum Value: 1.0 Scale actor: 1.0 NoUnits itle: Ozone Weighted emperature Sensitivity Ratio, dn/d Unique ield Definition: OMS-OM-Shared he ozone weighted temperature sensitivity ratio, dn/d. - ield Name: nstrumentconfigurationd HE5_NAVE_UN8 nimes Maximum Value: Scale actor: 1.0 NoUnits L1B Unique ield Definition: OM-Specific itle: nstrument Configuration D nstrument Configuration D as defined by OMS operations. - ield Name: LayerEfficiency HE5_NAVE_LOA nlayers,nxtrack,nimes.0 Maximum Value: 10.0 Scale actor: 1.0 NoUnits itle: Algorithmic Layer Efficiency Unique ield Definition: OMS-OM-Shared Description: he algorithmic layer efficiency.

13 - ield Name: MeasurementQualitylags HE5_NAVE_UN8 nimes Maximum Value: Scale actor: 1.0 NoUnits itle: Measurement Quality lags Unique ield Definition: OMS-OM-Shared he measurement quality flag associated with each "scan" line (Bit value is 0 for not set and 1 for set): Bit 0 - Measurement Missing lag: All ground pixels have L1B PixelQualitylags bit 0 set. Bit 1 - Measurement Error lag: Any of L1B MeasurementQualitylags bit 0, 1 or 3 are set for radiance or solar product used. Bit 2 - Measurement Warning lag: Any of L1B MeasurementQualitylags bit 2, 4, 5, 8, 9 are set for radiance or solar product used. Bit 3 - Rebinned Measurement lag: L1B radiance MeasurementQualitylags bit 7 is set. Bit 4 - SAA lag: L1B MeasurementQualitylags bit 10 is set for radiance or solar product used. Bit 5 - Spacecraft Maneuver lag: L1B MeasurementQualitylags bit 11 is set for radiance or solar product used. Bit 6 - nstrument Setting Error lag: Values for Earth and solar nstrumentconfigurationd are not compatible. Bit 7 - o be defined (currently set to 0). - ield Name: NumberSmallPixelColumns HE5_NAVE_UN8 nimes Maximum Value: Scale actor: 1.0 NoUnits L1B itle: Number of Small Pixel Columns Unique ield Definition: OM-Specific NumberSmallPixelColumns is either 0 (for no or invalid small pixel column

14 selected) or equal to the number of co-additions. - ield Name: NValue HE5_NAVE_LOA nwavel,nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 NoUnits itle: Measured N-Value Unique ield Definition: OMS-OM-Shared Description: he measured N-value. - ield Name: O3BelowCloud HE5_NAVE_LOA nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 DU itle: Ozone Below ractional Cloud Unique ield Definition: OMS-OM-Shared Description: he ozone below fractional cloud (DU). - ield Name: Qualitylags HE5_NAVE_UN16 nxtrack,nimes Maximum Value: Scale actor: 1.0 NoUnits itle: Quality lags Unique ield Definition: OMS-OM-Shared Bits 0 to 3 together contain several output error flags: 0 - good sample 1 - glint contamination (corrected) 2 - sza > 84 (degree) residual > threshold 4 - residual at unused ozone wavelength > 4 sigma 5 - SO > 4 sigma (SO2 present) 6 - non-convergence 7 - abs(residual) > 16.0 (fatal) Add 8 for descending data.

15 Bits 4 to 7 are reserved for future use (currently set to 0). Bits 8 to 15 are flags that are set to 0 for ALSE (good value), or 1 for RUE (bad value): Bit 8 - geolocation error (anomalous OV Earth location) Bit 9 - sza > 88 (degree) Bit 10 - missing input radiance Bit 11 - error input radiance Bit 12 - warning input radiance Bit 13 - missing input irradiance Bit 14 - error input irradiance Bit 15 - warning input irradiance - ield Name: Reflectivity331 HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 "%" itle: Effective Surface Reflectivity at 331 nm Unique ield Definition: OMS-OM-Shared he effective surface reflectivity at 331 nm (percent). - ield Name: Reflectivity360 HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 "%" itle: Effective Surface Reflectivity at 360 nm Unique ield Definition: OMS-OM-Shared he effective surface reflectivity at 360 nm (percent). - ield Name: Residual HE5_NAVE_LOA nwavel,nxtrack,nimes Minimum Value: Maximum Value: 32.0 Scale actor: 1.0 NoUnits itle: N-Value Residual

16 Unique ield Definition: OMS-OM-Shared Description: he N-value residual. - ield Name: ResidualStep1 HE5_NAVE_LOA nwavel,nxtrack,nimes Minimum Value: Maximum Value: 32.0 Scale actor: 1.0 NoUnits itle: Step 1 N-Value Residual Unique ield Definition: OMS-OM-Shared Description: he step 1 N-value residual. - ield Name: ResidualStep2 HE5_NAVE_LOA nwavel,nxtrack,nimes Minimum Value: Maximum Value: 32.0 Scale actor: 1.0 NoUnits itle: Step 2 N-Value Residual Unique ield Definition: OMS-OM-Shared Description: he step 2 N-value residual. - ield Name: Sensitivity HE5_NAVE_LOA nwavel,nxtrack,nimes.0 Maximum Value: 1.0 Scale actor: 1.0 NoUnits itle: Ozone Sensitivity Ratio, dn/domega Unique ield Definition: OMS-OM-Shared Description: he ozone sensitivity ratio, dn/domega. - ield Name: SmallPixelColumn HE5_NAVE_N16 nimes Maximum Value: Scale actor: 1.0 NoUnits

17 L1B itle: Small Pixel Column Unique ield Definition: OM-Specific Column number on the CCD for which the pixels are additionally transmitted without co-addition. - ield Name: SO2index HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: Scale actor: 1.0 NoUnits itle: SO2 ndex Unique ield Definition: OMS-OM-Shared Description: he SO2 index associated with the ground pixel. - ield Name: StepOneO3 HE5_NAVE_LOA nxtrack,nimes Minimum Value: 50.0 Maximum Value: Scale actor: 1.0 DU itle: Step 1 Ozone Solution Unique ield Definition: OMS-OM-Shared he step 1 ozone solution (in DU) associated with the ground pixel. - ield Name: StepwoO3 HE5_NAVE_LOA nxtrack,nimes Minimum Value: 50.0 Maximum Value: Scale actor: 1.0 DU itle: Step 2 Ozone Solution Unique ield Definition: OMS-OM-Shared he step 2 ozone solution (in DU) associated with the ground pixel. - ield Name: errainpressure HE5_NAVE_LOA

18 nxtrack,nimes.0 Maximum Value: Scale actor: 1.0 hpa itle: errain Pressure Unique ield Definition: OMS-OM-Shared he terrain pressure at the center of the ground pixel (from the V8 OMS algorithm). - ield Name: UVAerosolndex HE5_NAVE_LOA nxtrack,nimes Minimum Value: Maximum Value: 30.0 Scale actor: 1.0 NoUnits itle: UV Aerosol ndex Unique ield Definition: OMS-OM-Shared he UV aerosol index associated with the ground pixel. - ield Name: Wavelength HE5_NAVE_LOA nwavel Minimum Value: Maximum Value: Scale actor: 1.0 nm itle: Wavelength Unique ield Definition: OMS-OM-Shared Description: he wavelength used in the OMO3 algorithm. Core Metadata: - Metadata Name: AssociatednstrumentShortName VA20 OM MC Description: Actual is "OM".

19 - Metadata Name: AssociatedPlatformShortName VA20 Aura MC Description: Actual is "Aura". - Metadata Name: AssociatedSensorShortName VA20 CCD Ultra Violet,CCD Visible MC Description: Actual is "CCD Ultra Violet". - Metadata Name: AutomaticQualitylag VA64 Passed,Suspect,ailed A granule-level quality flag that applies generally to the granule and specifically to the parameters at the granule level. - Metadata Name: AutomaticQualitylagExplanation VA255 he AutomaticQualitylag is set to 1) "Passed" if QAPercentHighQualityData >= 90%, 2) "Suspect" if QAPercentHightQualityData >= 60% or if the input L1B file does not have its AutomaticQualitylag set to "Passed", and 3) "ailed" if QAPercentHighQualityData < 60%. - Metadata Name: DayNightlag VA5 Day,Night,Both MC Description: Actual is "Day". - Metadata Name: EquatorCrossingDate D L1B

20 Description: he date of the descending equator crossing in the granule. - Metadata Name: EquatorCrossingLongitude L Minimum Value: Maximum Value: L1B he terrestrial longitude of the descending equator crossing in the granule. - Metadata Name: EquatorCrossingime L1B Description: he time of the descending equator crossing in the granule. - Metadata Name: nputpointer VA255 Number of Values: 0,10 Example is ("OM-Aura_L1-OML1BRUG_2002m0630t2354-o21434_v m0327t he4", "OM-Aura_L1-OML1BRR_2002m0630t2354-o21434_v m0327t he4", "OZON_CLM.txt", "EMP_CLM.txt", "terrain_pressure.he4", "cloud_pressure.he4", "NVAL_LU_omiOMS_RRS.h5", "DNDX_LU_omiOMS.h5"). - Metadata Name: LocalGranuleD VA80 Example is "OM-Aura_L1-OMO3_2002m0630t2354-o21434_v m0515t he5" (see Appendix E of Reference 3). - Metadata Name: LOCALVERSOND VA60 PC MD5 fingerprint of the HD product file. Example valids are

21 "RC1321 MD5 = not yet calculated" and "RC1321 MD5 = [0-9,a-f]{32}". - Metadata Name: OperationalQualitylag VA20 > Passed,ailed,Being nvestigated,not nvestigated,nferred Passed, nferred ailed,suspect A granule-level quality flag that applies generally to the granule and specifically to the parameters at the granule level. - Metadata Name: OperationalQualitylagExplanation VA255 he criteria for setting the OperationalQualitylag should be stated here (this Metadata will not appear in the granule). - Metadata Name: OPERAONMODE VA20 Normal,est PC Description: Example is "Normal" (not implemented yet). - Metadata Name: OrbitNumber Minimum Value: 1 Maximum Value: L1B Description: he OM orbit number. - Metadata Name: ParameterName VA40 otal Column Ozone Description: he measured science parameter expressed in the granule. - Metadata Name: VERSON VA10

22 PC Description: Example is "0.9.33" (see Appendix K of Reference 3). - Metadata Name: ProductionDateime D K Description: he date and time of the Level 2 processing. - Metadata Name: QAPercentMissingData Maximum Value: 100 he percent of missing data from Level 1B calibrated radiance needed by OMO3 data per granule. - Metadata Name: RangeBeginningDate D L1B Description: he year, month and day when the granule began. - Metadata Name: RangeBeginningime L1B he hour, minute, second and fraction of a second when the granule began. - Metadata Name: RangeEndingDate D L1B Description: he year, month and day when the granule ended. - Metadata Name: RangeEndingime L1B

23 he hour, minute, second and fraction of a second when the granule ended. - Metadata Name: REPROCESSNGACUAL VA20 > processed 1 time,processed 2 times,processed 3 times,processed 4 times PC An indication of what reprocessing has been performed on the granule. - Metadata Name: ReprocessingPlanned VA45 > no further update anticipated,further update is anticipated, further update anticipated using enhanced DP Description: Actual is "further update is anticipated". - Metadata Name: ScienceQualitylag VA20 > Passed,ailed,Being nvestigated,not nvestigated,nferred Passed, nferred ailed,suspect DP Description: Actual is "Not nvestigated". - Metadata Name: ScienceQualitylagExplanation VA255 DP An explanation of the criteria used to set the science quality flag should go here. - Metadata Name: ShortName VA8 OMO3 MC Description: Actual is "OMO3". - Metadata Name: SizeMBECSDataGranule

24 L.0 Maximum Value: DSS he volume of data contained in the granule in Mb (this Metadata will not appear in the granule). - Metadata Name: VersionD S Maximum Value: 999 MC Description: Actual is 1 for test and pre-launch. Product Specific Attributes: - Metadata Name: EndBlockNr S,500 Minimum Value: 1 Maximum Value: 50 L1B Description: he number of the NOSE end block along the track. - Metadata Name: ExpeditedData VA10 RUE,ALSE L1B Description: he indicator for expedited Level 0 data. - Metadata Name: Exposureimes,256.0 Maximum Value: L1B An array containing the exposure times in seconds used for the measurements. - Metadata Name: nstrumentconfigurationds S,256

25 Maximum Value: 255 L1B An array containing the instrument configuration identifiers used for the measurements. - Metadata Name: MasterClockPeriods,128.0 Maximum Value: 10.0 L1B An array containing the master clock periods in seconds used for the measurements. - Metadata Name: NrMeasurements Maximum Value: 9999 L1B he number of measurements in the granule (per output product). - Metadata Name: NrSpatialZoom Maximum Value: 9999 L1B Description: he number of measurements in spatial zoom mode. - Metadata Name: NrSpectralZoom Maximum Value: 9999 L1B Description: he number of measurements in spectral zoom mode. - Metadata Name: NrZoom Maximum Value: 9999 L1B Description: he number of measurements in zoom modes.

26 - Metadata Name: PathNr,500 Minimum Value: 1 Maximum Value: 466 L1B Description: Number of the NOSE path within the repeat cycle. - Metadata Name: SolarEclipse VA10 RUE,ALSE L1B he indicator that during part of the measurements a solar eclipse occurred. - Metadata Name: SouthAtlanticAnomalyCrossing VA10 RUE,ALSE L1B he indicator that during part of the measurements the spacecraft was in the South Atlantic Anomaly. - Metadata Name: SpacecraftManeuverlag VA10 RUE,ALSE,UNKNOWN L1B he indicator that during part of the measurements the spacecraft was performing a maneuver. - Metadata Name: StartBlockNr S,500 Minimum Value: 1 Maximum Value: 50 L1B Description: Number of the NOSE start block along the track. Archived Metadata: - Metadata Name: AlgorithmPath1QualitylagCounts

27 1 6 Maximum Value: he total number of samples that are processed through algorithm path that have Qualitylags set in the respective categories. - Metadata Name: AlgorithmPath2QualitylagCounts 6 Maximum Value: he total number of samples that are processed through algorithm path 2 that have Qualitylags set in the respective categories. - Metadata Name: AlgorithmPath3QualitylagCounts 6 Maximum Value: he total number of samples that are processed through algorithm path 3 that have Qualitylags in the respective categories. - Metadata Name: APrioriOzoneProfileSource VA80 PC he source of apriori ozone profile used in derived total ozone. Example is "Climatology". - Metadata Name: BackupSolarProductUsed Maximum Value: 1 Set to 1 if the backup Solar product is used instead of the normal solar

28 product. - Metadata Name: CloudPressureSource VA80 PC he source of cloud top pressure used in derived total ozone. Examples are "Climtology", "OMCLDRR Cloud Pressure" and "OMCLDO2 Cloud Pressure". - Metadata Name: ESDDescriptorRevision VA20 MC he version of the ESD descriptor file as determined by ECS. - Metadata Name: nstrumentconfigurationdsnoncompatible VA80 RUE L1B Set to RUE if NumberOfnstrumentSettingsError is greater than 0. Otherwise it would not appear in the Archived Metadata. - Metadata Name: rradiancesceincequalitylag VA80 > Passed,ailed,Being nvestigated,not nvestigated,nferred Passed, nferred ailed,suspect L1B Set to the value for the radiance product ScienceQualitylag attribute. - Metadata Name: LongName VA80 OM/Aura Ozone (O3) otal Column 1-Orbit L2 Swath 13x24km MC Actual is "OM/Aura Ozone (O3) otal Column 1-Orbit L2 Swath 13x24km" (see Section 7.0 of Reference 2).

29 - Metadata Name: NumberOfBadnputSamples Maximum Value: he total number of bad samples out of NumberOfnputSamples. he error flag is set for these samples. - Metadata Name: NumberOfGlintCorrectedSamples Maximum Value: he total number of glint corrected samples in the ascending part of the orbit. Qualitylags is set to 1 for these samples. - Metadata Name: NumberOfGoodnputSamples Maximum Value: he total number of good samples out of NumberOfnputSamples in the ascending part of the orbit. No error, warning or geolocation flags are set for these samples. - Metadata Name: NumberOfGoodOutputSamples Maximum Value: he total number of good samples in the ascending part of the orbit. Qualitylags is set to 0 for these samples. - Metadata Name: NumberOfnputSamples Maximum Value:

30 he total number of samples read from the Level 1B file for processing. n general this is equal to nxtrack * nimes. - Metadata Name: NumberOfnputWarningSamples Maximum Value: he total number of warning samples out of NumberOfnputSamples. he warning flag is set for these samples. - Metadata Name: NumberOfLargeSZAnputSamples Maximum Value: he total number of samples out of NumberOfGoodnputSamples with a Solar Zenith Angle (SZA) greater or equal to 84.0 degrees in the ascending part of the orbit. - Metadata Name: NumberOfMissingnputSamples Maximum Value: he total number of missing samples out of NumberOfnputSamples. - Metadata Name: NumberOfSkippedSamples Maximum Value: Description: he total number of samples that are skipped. - Metadata Name: NumberOfStep1nvalidSamples

31 Maximum Value: he total number of samples with errors detected in step one processing. - Metadata Name: NumberOfStep2nvalidSamples Maximum Value: he total number of samples with errors detected in step two processing. - Metadata Name: QAPctnstrumentSettingsError Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 5 is set. - Metadata Name: QAPctrradianceError Maximum Value: 100 Percent of ground pixels for which L2 Qualitylags bit 14 is set. - Metadata Name: QAPctrradianceMissing Maximum Value: 100 Percent of ground pixels for which L2 Qualitylags bit 13 is set. - Metadata Name: QAPctrradianceWarning Maximum Value: 100

32 Percent of ground pixels for which L2 Qualitylags bit 15 is set. - Metadata Name: QAPctMeasurementError Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 1 is set. - Metadata Name: QAPctMeasurementManeuver Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 5 is set. - Metadata Name: QAPctMeasurementMissing Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 0 is set. - Metadata Name: QAPctMeasurementRebinned Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 3 is set. - Metadata Name: QAPctMeasurementSAA Maximum Value: 100

33 Percent of "scan" lines for which L2 MeasurementQualitylags bit 4 is set. - Metadata Name: QAPctMeasurementWarning Maximum Value: 100 Percent of "scan" lines for which L2 MeasurementQualitylags bit 2 is set. - Metadata Name: QAPctRadianceError Maximum Value: 100 Percent of ground pixels for which L2 Qualitylags bit 11 is set. - Metadata Name: QAPctRadianceMissing Maximum Value: 100 Percent of ground pixels for which L2 Qualitylags bit 10 is set. - Metadata Name: QAPctRadianceWarning Maximum Value: 100 Percent of ground pixels for which L2 Qualitylags bit 12 is set. - Metadata Name: QAPercentHighQualityData Maximum Value: 100

34 QAPercentHighQualityData = 100 * (NumberOfGoodOutputSamples + NumberOfGlintCorrectedSamples) / (NumberOfGoodnputSamples - NumberOfLargeSZAnputSamples). - Metadata Name: RadianceScienceQualitylag VA80 > Passed,ailed,Being nvestigated,not nvestigated,nferred Passed, nferred ailed,suspect L1B Set to the value for the radiance product ScienceQualitylag metadata attribute. - Metadata Name: SnowceSource VA80 PC he source of Snow/ce coverage used in derived total ozone. Example is "NSE from OML1BRUG". - Metadata Name: SolarrradianceWarning Maximum Value: 1 Description: Set to 1 if NumberOfrradianceWarning is larger than 0. - Metadata Name: SolarProductMissing Maximum Value: 1 Set to 1 if Normal Solar product could not be opened, or when there is fatal error in reading the solar irradiance file. - Metadata Name: SolarProductOutOfDate Maximum Value: 1

35 Set to 1 if the time difference between the used Solar product and the radiance file is larger than the threshold. - Metadata Name: emperaturesource VA80 PC he source of temperature profile used in derived total ozone. Example is "Climtology". - Metadata Name: errainpressuresource VA80 PC he source of terrain pressure used in derived total ozone. Example is "Climtology". - Metadata Name: ZonalLatitudeMaximum D Number of Values: 5 Minimum Value: Maximum Value: 90.0 Description: he maximum latitude of each zone. - Metadata Name: ZonalLatitudeMinimum D Number of Values: 5 Minimum Value: Maximum Value: 90.0 Description: he minimum latitude of each zone. - Metadata Name: ZonalOzoneMaximum D Number of Values: 5.0 Maximum Value: Description: he maximum ozone (in DU) of each zone. - Metadata Name: ZonalOzoneMinimum

36 D Number of Values: 5.0 Maximum Value: Description: he minimum ozone (in DU) of each zone. References: > 1. "OM Algorithm heoretical Basis Document, Volume, OM Ozone Products" (OM-ABD-VOL2, ABD-OM-02, Version 2.0, August 2002) 2. "HD-EOS Aura ile ormat Guidelines" (OM-AURA-DAA-GUDE, Version 1.3, 16 October 2003) 3. "OM Science Software Delivery Guide for Version 0.9" (OM-SSDG-0.9.8, Version 0.9.8, 14 August 2003) 4. "OM GDPS nput/output Data Specification (ODS) Volume 2" (OM-GDPS-ODS-2, SD-OME-7200-DS-467, 9 April 2003) 5. "Release 6A mplementation Earth Science Data Model for the ECS Project" (420-P , June 2001) ( and 6. "OM L2 - L4 Metadata Reference Guide" (3 July 2002) (