MOD10A1 and MYD10A1 Global Attributes

The MODIS snow cover products include three EOSDIS Core System (ECS) global attributes, which are stored as long character strings in parameter value language (PVL) format. MOD10_L2 also includes product specific attributes.

Product Specific Attributes


Object Name Comments Sample Value
ShortName ESDT1 name of product MOD10A1
VersionID ECS Version 1
ReprocessingActual Number of times processed processed once
ReprocessingPlanned Expect that products will be reprocessed at least once further update is anticipated
LocalGranuleID MOD10A1.A1997224.h12v04.002.1997207184837.hdf
DayNightFlag Snow will have either Day or Both Day
ProductionDateTime Time granule was produced 1999-07-26T18:49:11.000Z
LocalVersionID Version of algorithm delivered from the SCF2. SCF V2.2.0
PGEVersion Version of production generation executable 2.2.1
InputPointer Location of input files in the production system UR_snow_file
RangeBeginningDate Beginning date of the first scan line in the swath 2000-09-03
RangeBeginningTime Beginning time of the first scan line in the swath 15:59:36.533952
RangeEndingDate Ending date of the last scan line in the swath 2000-09-03
RangeEndingTime Ending time of the last scan line in the swath 17:44:33.758431
ExclusionGRingFlag N
GRingPointLatitude Geographic latitude bounds of swath coverage [50.000000, 50.000000, 40.000000, 40.000000]
GringPointLongitude Geographic longitude bounds of swath coverage [-93.328292, -77.772496, -65.269106, -78.324016]
GRingPointSequenceNo [1,2,3,4]
OrbitNumber 3627
EquatorCrossingLongitude -51.985624
EquatorCrossingDate 2000-09-03
EquatorCrossingTime 14:24:39.045138
ParameterName Parameter for which QA statistics are given in this metadata object Day_Tile_Snow_Cover
AutomaticQualityFlag Result of automated checks during the run of the algorithm that screens for significant amounts
of anomalous data
AutomaticQualityFlagExplanation Explanation of result of automated QA checks made during execution No errors detected in processing
QAPercentMissingData 0-100 1
QAPercentCloudCover 0-100 34
AncillaryInputPointer Location of geolocation input product in production system .../MOD03.A1999053.0525.002.1999217114009.hdf
AssociatedPlatformShortName AM-1 or Terra
AssociatedInstrumentShortName MODIS
AssociatedSensorShortName "CCD"
Product Specific Attributes (PSA)
QAPercentGoodQuality Summary quality assurance statistics for data product. 95
QAPercentOtherQuality 2
QAPercentNotProducedCloud 6
QAPercentNotProducedOther 3
HorizontalTileNumber 12
VerticalTileNumber 04
TileID 11012004
SnowCoverPercent Summary percentage of snow-covered land 63

1 Earth Science Data Type (ESDT)
2 Science Computing Facility (SCF)


This attribute contains information relevant to production of the data product. It also contains an alternate bounding of geographic coverage of the swath. These data are useful in determining what version of the algorithm was used to generate the product.

Object Name Comment Sample Value
CharacteristicBinAngularSize 15.000000
CharacteristicBinSize 463.312717
GEOAnyAbnormal None
GEOEstMaxRMSError 200.00000
DataColumns 2400
DataRows 2400
GlobalGridColumns 86400
GlobalGridRows 43200
AlgorithmPackageAcceptanceDate Algorithm descriptors 1999-04-06
AlgorithmPackageMaturityCode pre-launch
AlgorithmPackageName MOD10A1V2
AlgorithmPackageVersion Version 2.2.1
InstrumentName Moderate-Resolution Imaging SpectroRadiometer
PlatformShortName "AM-1" or "Terra"
ProcessingDateTime 1999-11-19T20:40:39:000Z
LongName MODIS L3 Daily Snow Cover (MOD10) product
Processing Center MODAPS
SPSOParameters none
LocalInputGranuleID Names of input files [MOD-2HKM, ...]
EastBoundingCoordinate Extent of swath coverage, in latitude and longitude -65.269106
WestBoundingCoordinate -93.328292
NorthBounding Coordinate 50.000000
SouthBounding Coordinate 40.000000
DESCRRevision Version of MCF used 1.1


This attribute is used by the HDF-EOS toolkit to specify the mapping relationships between the geolocation data and the snow cover Scientific Data Sets (SDSs). Mapping relationships are unique in HDF-EOS and are stored in the product using HDF structures. A description of the mapping relationships is not provided here.

Object Definition
GRIDNAME MOD_Grid_Snow_500m
DATAFIELD_1 Day_Tile_Snow_Cover
DATAFIELD_2 Snow_Spatial_QA

Product Specific Attributes

Attribute Name Comment Sample Value
HDFEOSVersion Version of HDF-EOS Toolkit HDFEOS_V2.4
L2GAutomaticQualtifyFlag Passed
L2GAutomaticQualityFlagExplanation output file is created and good
L2GCoverageCalculationMethod area
L2GNumberOfOverlapGranules Number of input granules with data falling in the tile 2
L2GFirstLayerSelectionCriteria maximum observation coverage
MOD10InputGranuleNames Listing of input files used to make the data product [M0D10_L2.A1999...,...
SCF Algorithm Version Internal SCF version $Id: MOD_PR10A1_AA...