HDF-EOS V2 MODIS L3 Intermediate Daily 500m Filtered Land Surface Reflectance File Specification
Original Version 6.0.2 (January 2014)
Product ID(s): MODHDFSR (Daily Filtered 500m Surf Refl)
Description:
MODHDFSR is an intermediate L3 500m daily Land Surface Reflectance
Product created by selecting one good observation for each L3 grid from
one or more observations in the input L2G tile. A filtering option is
speicified during the production for selecting the required L2G observation
for output. The selected filtering option is also output as one of the
metadata. The valid filtering options are
0: cloud free
1: cloud free, and land
2: cloud free, and land or coastline or ephemeral water
3: cloud free, and land or ephemeral water, and low or medium aerosol
The output file contains seven surface reflectance bands and viewing
geometry (sensor zenith and azimuth, solar zenith and azimuth) corresponding
to the output observation. No QA SDS is created, however QA percentage metadata
QAPERCENTINTERPOLATEDDATA, QAPERCENTMISSINGDATA,
QAPERCENTOUTOFBOUNDSDATA, QAPERCENTCLOUDCOVER
QAPERCENTGOODQUALITY, QAPERCENTOTHERQUALITY
QAPERCENTNOTPRODUCEDCLOUD, QAPERCENTNOTPRODUCEDOTHER
are produced with following interpretation:
INTERPOLATEDDATA : The input L2G contained valid observations. But output
may contain a valid value or fill value as a result
of overall processing.
MISSINGDATA : Output could not be created because input didn't contain
any observation that could be processed.
OUTOFBOUNDSDATA : Always 0 (outofboundsdata not considered)
CLOUDCOVER : Always 0. (this process filters out all cloudy data)
(Sum of above four metadata should add upto 100)
GOODQUALITY : There was at least one l2g observation to process. The
observation selected for output satisfies all filtering
constraints. All output bands are of good quality.
OTHERQUALITY : There was at least one l2g observation to process. The
observation selected for output satisfies all filtering
constrains. But all bands may not be of good quality.
However first band in the argument list is of good quality.
NOTPRODUCEDCLOUD : There was at least one input observation considered for
processing but all such observations were cloudy and hence
output is a fill value.
NOTPRODUCEDOTHER : Output is a fill value because all input observations
are either missing, or if there was at least one observation
available for processing, not all were cloudy but they were
bad as per the other filtering constraints.
(Sum of above four metadata should add upto 100)
Point of Contact:
MODIS Science Team Members:
Chris Justice
MODIS Land Science Team University of Maryland
justice@kratmos.gsfc.nasa.gov NASA/GSFC Code 923
phone: 301-286-7372 Greenbelt, MD 20771
David Roy
LDOPE University of Maryland
droy@kratmos.gsfc.nasa.gov NASA/GSFC Code 922
phone: 301 614 5571 Greenbelt, MD 20771
Developers:
Sadashiva Devadiga
LDOPE Science Systems and Applications Inc.
devadiga@ltpmail.gsfc.nasa.gov NASA/GSFC Code 922
phone: 301-614-5449 Greenbelt, MD 20771
===========================================================================
Generic Constructs
ECS Metadata Strings:
Notes: "FR" is an abbreviation for "FREE_RANGE".
"D/T" is an abbreviation for "DATE/TIME"
(A) implies that multiple values are stored within a
single array.
A value of "Variable" indicates that this value will vary
according to the granule being processed.
"M" means class M.
CoreMetadata.0
This string will contain the following PVL fields:
# of
Field Name Data Value Value
Type s
GROUP = INVENTORYMETADATA
GROUP = CollectionDescriptionClass
SHORTNAME STRING 1 "MODHDFSR"
VERSIONID STRING 1 Variable
END_GROUP = CollectionDescriptionClass
GROUP = ECSDataGranule
REPROCESSINGPLANNED STRING 1 "no further update
anticipated"
REPROCESSINGACTUAL STRING 1 "processed once"
LOCALGRANULEID STRING 1 Variable
DAYNIGHTFLAG STRING 1 Variable
PRODUCTIONDATETIME D/T 1 Variable
LOCALVERSIONID STRING 1 Variable
SIZEMBECSDATAGRANULE FLOAT 1 Variable
END_GROUP = ECSDataGranule
GROUP = PGEVersionClass
PGEVERSION STRING 1 "6.0.1"
END_GROUP = PGEVersionClass
GROUP = InputGranule
INPUTPOINTER STRING FR (A) Variable
END_GROUP = InputGranule
GROUP = RangeDateTime
RANGEBEGINNINGDATE DATE 1 Variable
RANGEBEGINNINGTIME TIME 1 Variable
RANGEENDINGDATE DATE 1 Variable
RANGEENDINGTIME TIME 1 Variable
END_GROUP = RangeDateTime
GROUP = GRing
EXCLUSIONGRINGFLAG STRING 1 "N"
END_GROUP = GRing
GROUP = GRingPoint
GRINGPOINTLATITUDE DOUBLE 4 (A) Variable
GRINGPOINTLONGITUDE DOUBLE 4 (A) Variable
GRINGPOINTSEQUENCENO INTEGER 4 (A) Variable
END_GROUP = GRingPoint
GROUP = OrbitCalculatedSpatialDomain
ORBITNUMBER INTEGER "NumberofGranules"
Variable
EQUATORCROSSINGLONGITUDE DOUBLE "NumberofGranules"
Variable
EQUATORCROSSINGDATE DATE "NumberofGranules"
Variable
EQUATORCROSSINGTIME TIME "NumberofGranules"
Variable
END_GROUP = OrbitCalculatedSpatialDomain
GROUP = MeasuredParameter
PARAMETERNAME STRING FR (A) "sur_refl_b01, sur_refl_b02, sur_refl_b03,
sur_refl_b04, SolarZeinth, SensorAzimuth,
SensorZenith SensorZenith"
GROUP = QAFlags
AUTOMATICQUALITYFLAG STRING 1 Variable
AUTOMATICQUALITYFLAGEXPLANATION
STRING 1 Variable
OPERATIONALQUALITYFLAG STRING 1 Variable
OPERATIONALQUALITYFLAGEXPLANATION
STRING 1 Variable
SCIENCEQUALITYFLAG STRING 1 Variable
SCIENCEQUALITYFLAGEXPLANATION
STRING 1 Variable
END_GROUP = QAFlags
GROUP = QAStats
QAPERCENTINTERPOLATEDDATA INTEGER 1 Variable
QAPERCENTMISSINGDATA INTEGER 1 Variable
QAPERCENTOUTOFBOUNDSDATA INTEGER 1 Variable
QAPERCENTCLOUDCOVER INTEGER 1 Variable
END_GROUP = QAStats
END_GROUP = MeasuredParameter
******************************************************************
* Note that MeasuredParameter group has
* Class = "M" (see sample MCF file).
* Basically one needs to put DataField (SDS) names to PARAMETERNAME
* and put corresponding QA metadata to QAFlags and QAStats.
* If one has only QA metadata for whole product, instead for each
* and individual DatFiels (SDS), it's suggested to put product
* name to PARAMETERNAME.
*******************************************************************
GROUP = AssociatedPlatformInstrumentSensor
ASSOCIATEDPLATFORMSHORTNAME STRING 1 "AM-1"
ASSOCIATEDINSTRUMENTSHORTNAME STRING 1 "MODIS"
ASSOCIATEDSENSORSHORTNAME STRING 1 "CCD"
END_GROUP = AssociatedPlatformInstrumentSensor
GROUP = AdditionalAttributes
ADDITIONALATTRIBUTENAME STRING FR (A) Variable
PARAMETERVALUE STRING FR (A) Variable
ADDITIONALATTRIBUTENAME.1 = "QAPERCENTGOODQUALITY"
ADDITIONALATTRIBUTENAME.2 = "QAPERCENTOTHERQUALITY"
ADDITIONALATTRIBUTENAME.3 = "QAPERCENTNOTPRODUCEDCLOUD"
ADDITIONALATTRIBUTENAME.4 = "QAPERCENTNOTPRODUCEDOTHER"
ADDITIONALATTRIBUTENAME.5 = "HORIZONTALTILENUMBER"
ADDITIONALATTRIBUTENAME.6 = "VERTICALTILENUMBER"
ADDITIONALATTRIBUTENAME.7 = "TileID"
ADDITIONALATTRIBUTENAME.8 = "INPUTFILESRESOLUTION"
*******************************************************
* Other SCF defined PSA attributes:
*******************************************************
END_GROUP = AdditionalAttributes
END_GROUP = INVENTORYMETADATA
ArchiveMetadata.0
This string will contain the following PVL fields:
# of
Field Name Data Value Value
Type s
GROUP = ARCHIVEMETADATA
GROUP = BoundingRectangle
WESTBOUNDINGCOORDINATE DOUBLE 1 Variable
NORTHBOUNDINGCOORDINATE DOUBLE 1 Variable
EASTBOUNDINGCOORDINATE DOUBLE 1 Variable
SOUTHBOUNDINGCOORDINATE DOUBLE 1 Variable
END_GROUP = BoundingRectangle
ALGORITHMPACKAGEACCEPTANCEDATE STRING 1 "TBD"
ALGORITHMPACKAGEMATURITYCODE STRING 1 "LAUNCH"
ALGORITHMPACKAGENAME STRING 1 "MODPRDFSR"
ALGORITHMPACKAGEVERSION STRING 1 "5"
GEOANYABNORMAL STRING 1 Variable
GEOESTMAXRMSERROR DOUBLE 1 Variable
LONGNAME STRING 1 "MODIS/Terra 500m Filtered Surface Reflectance
Daily Global 500m ISIN Grid"
SPSOPARAMETERS STRING 1 "none"
PROCESSINGCENTER STRING 1 "MODAPS"
NUMBEROFGRANULES INTEGER 1 Variable
GRANULEBEGINNINGDATETIME STRING "NumberofGranules"
Variable
GRANULEENDINGDATETIME STRING "NumberofGranules"
Variable
GRANULEDAYNIGHTFLAG STRING "NumberofGranules"
Variable
NUMBEROFORBITS INTEGER 1 Variable
SYSTEMFILENAME STRING "NumberofGranules"
Variable
NADIRDATARESOLUTION STRING 1 Variable
CHARACTERISTICBINANGULARSIZE DOUBLE 1 Variable
CHARACTERISTICBINSIZE DOUBLE 1 Variable
DATACOLUMNS INTEGER 1 Variable
DATAROWS INTEGER 1 Variable
GLOBALGRIDCOLUMNS INTEGER 1 Variable
GLOBALGRIDROWS INTEGER 1 Variable
MAXIMUMOBSERVATIONS INTEGER 1 Variable
COVERAGECALCULATIONMETHOD STRING 1 Variable
SEAPROCESSED STRING 1 Variable
MASKINGLOGICUSED STRING 1 Variable
DESCRREVISION STRING 1 Variable
******************************************************************
* 1. The field "L2GStorageFormat" is either "full",
* "compact" or "one layer only".
* 2. The field "CoverageCalculationMethod" is either
* "area" or "simple PSF".
* 3. The field "FirstLayerSelectionCriteria" is either
* "nearest neighbor" or "maximum observation coverage".
******************************************************************
END_GROUP = ARCHIVEMETADATA
StructuralMetadata.0
This string will be populated automatically by HDF-EOS.
Grid Structure: MOD_GRID_HDFSR
Dimensions:
Dimension Name Value
YDim:MOD_GRID_HDFSR "Data Rows"
XDim:MOD_GRID_HDFSR "Data Columns"
Corner Locations:
Corner Values
UpperLeftPointMtrs (Variable, Variable)
LowerRightPointMtrs (Variable, Variable)
Geographic Grid Projection Parameters:
Note that all grid parameters are currently under development
and may need to be revised prior to V2.0 code delivery.
Supported Grids: Integerized Sinusoidal (GCTP_ISINUS)
Interrupted Goodes Homolosine (GCTP_GOOD)
Lambert Azimuthal Equal Area (GCTP_LAMAZ)
Projection gridID = GCTP_ISINUS
ProjParam[0] 6371007.181
ProjParam[1 to 7] 0.0
ProjParam[8] 86400
ProjParam[9] 0.0
ProjParam[10] 1.0
ProjParam[11 to 12] 0.0
Spherecode -1
GridOrigin HDFE_GD_UL
Projection gridID = GCTP_GOOD
ProjParam[0 to 12] 0.0
Spherecode 19
GridOrigin HDFE_GD_UL
Projection gridID = GCTP_LAMAZ
ProjParam[0] 6371228.0
ProjParam[1 to 5] 0.0
ProjParam[6] Variable
ProjParam[7 to 12] 0.0
Spherecode 19
GridOrigin HDFE_GD_UL
===========================================================================
DataFields:
===========================================================================
Name Data Type Dimensions
sur_refl_b01 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 1
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b01
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b02 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 2
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b02
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b03 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 3
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b03
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b04 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 4
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b04
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b05 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 5
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b05
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b06 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 6
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b06
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
sur_refl_b07 INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Surface reflecatnce Band 7
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 sur_refl_b07
units STRING 4 none
valid_range INT16 2 -100, 16000
_FillValue INT16 1 -28762
scale_factor FLOAT32 1 0.0001
add_offset FLOAT32 1 0.0000
===========================================================================
Name Data Type Dimensions
SensorZenith INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Viewing Angle: Sensor Zenith
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 SensorZenith
units STRING 4 degree
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT32 1 0.01
===========================================================================
Name Data Type Dimensions
SensorAzimuth INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Viewing Angle: Sensor Azimuth
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 13 SensorAzimuth
units STRING 4 degree
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32767
scale_factor FLOAT32 1 0.01
===========================================================================
Name Data Type Dimensions
SolarZenith INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Viewing Angle: Solar Zenith
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 11 SolarZenith
units STRING 4 degree
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32762
scale_factor FLOAT32 1 0.01
===========================================================================
Name Data Type Dimensions
SolarAzimuth INT16 "YDim:MOD_GRID_HDFSR",
"XDim:MOD_GRID_HDFSR"
Description:
Viewing Angle: Solar Azimuth
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 12 SolarAzimuth
units STRING 4 degree
valid_range INT16 2 0, 18000
_FillValue INT16 1 -32762
scale_factor FLOAT32 1 0.01
===========================================================================
Name Data Type Dimensions
sur_refl_state_qa UINT8 "YDim:MOD_GRID_QDFSR",
"XDim:MOD_GRID_QDFSR"
Description:
500m State QA: sur_refl_state_qa
Bit Description (right to left)
0: MOD09 internal cloud mask
1: MOD09 internal snow mask
2: MOD09 internal cloud shadow
3-5: land/water mask
000 -- shallow ocean
001 -- land
010 -- ocean coastlines and land shorelines
011 -- shallow inland water
100 -- ephemeral water
101 -- deep inland water
110 -- continental/moderate ocean
111 -- deep ocean
6-7: aerosol quantity; climatology (00), low (01) average (10), high (11)
HDF Attributes:
Number of
Values or
Max.
Attribute Data String Value
Type Length
long_name STRING 29 Surface Reflectance State QA
units STRING 4 none
valid_range UINT8 2 0, 254
_FillValue UINT8 1 255
===========================================================================