MOD29P1D and MYD29P1D Global Sea Ice Attributes, Version 5

The MOD29P1D and MYD29P1D sea ice product data files include three Earth Observing System Data and Information System (EOSDIS) Core System (ECS) global attributes. These global attributes are stored as character strings in Parameter Value Language (PVL) format. Also, these global attributes as well as other attributes can be found in the associated metadata file, and are formatted as Extensible Markup Language (XML). The metadata file should be examined to determine if post-production changes were made to the metadata. Post-production metadata changes are not updated in the data file. Changes such as Quality Assessment (QA) updates are only reflected in the metadata file.

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Also known as inventory metadata, core metadata are used to populate the EOSDIS Core System (ECS) inventory, which allows users to locate granules of interest.

Object Name Comments Sample Value
ShortName Earth Science Data Type (ESDT), name of product. MOD29P1D
VersionID ECS Version 5
ReprocessingActual There are two sample values for this object: processed and reprocessed. The granule is considered processed if it is the first time the data is processed, and the granule is considered reprocessed if it was previously processed. reprocessed
ReprocessingPlanned Expect that products will be reprocessed at least once further update is anticipated
LocalGranuleID Name of the granule MOD29P1D.A2000057.h04v06.005.2006252042343.hdf
DayNightFlag Can be Day, Night, or Both Day
ProductionDateTime Time granule was produced 2006-09-09 04:23:46.0
LocalVersionID Version of algorithm delivered from the Science Computing Facility (SCF). SCF 5.0.0
PGEVersion Version of production generation executable 5.0.2
InputPointer Input granules used to produce the granule. MOD29PGD.A2000057.h04v06.005.2006252042230.hdf, MODPTPGD.A2000057.h04v06.005.2006252042150.hdf MODMGPGD.A2000057.h04v06.005.2006252042209.hdf
RangeBeginningDate Beginning date of the first scan line in the swath 2000-02-26
RangeBeginningTime Beginning time of the first scan line in the swath 18:10:00.000000
RangeEndingDate Ending date of the last scan line in the swath 2000-02-26
RangeEndingTime Ending time of the last scan line in the swath 20:00:00.000000
ExclusionGringFlag N
GringPointLatitude Geographic latitude bounds of swath coverage 31.6002389831511
GringPointLongitude Geographic longitude bounds of swath coverage -122.471192290848
GringPointSequenceNo [1,2,3,4]
OrbitNumber 1025
EquatorCrossingLongitude -115.456561180703
EquatorCrossingDate 2000-02-26
EquatorCrossingTime 18:26:36.057974
ParameterName Parameter for which QA statistics are given. Two containers for QA statistics used. Sea_Ice_by_Reflectance
AutomaticQualityFlag Result of automated checks during the run of the algorithm that screens for significant amounts of anomalous data Passed
AutomaticQualityFlagExplanation Explanation of result of automated QA checks made during execution No automatic quality assessment done in the PGE
QAPercentMissingData 0-100 21 for IST, 0 for Sea Ice by Reflectance
QAPercentCloudCover 0-100 17 for IST, 17 for Sea Ice by Reflectance
ScienceQualityFlag Set by snow investigator after post-production investigation Not Investigated
ScienceQualityFlagExplanation Explanation of Science Flag

for the product Science Quality status.

AssociatedPlatformShortName Terra
AssociatedInstrumentShortName MODIS
AssociatedSensorShortName MODIS

CoreMetadata.0 Product Specific Attributes (PSAs)

The CoreMetadata.0 product specific metadata attributes can be found by using most search tools.

Object Name Comments Sample Value
QAPercentGoodQuality Summary quality assessment statistic based on the thermal data. Range is 0-100. 17
QAPercentOtherQuality 83
HorizontalTileNumber See the following documents for bounding coordinate information for each tile:
MODIS Sea Ice Tile Bounding Coordinates, Northern Hemisphere
MODIS Sea Ice Tile Bounding Coordinates, Southern Hemisphere
MODIS MODLAND Tile Calculator: converts between MODIS tile numbers and latitude/longitude coordinates.
VerticalTileNumber See the following documents for bounding coordinate information for each tile:
MODIS Sea Ice Tile Bounding Coordinates, Northern Hemisphere
MODIS Sea Ice Tile Bounding Coordinates, Southern Hemisphere
MODIS MODLAND Tile Calculator: converts between MODIS tile numbers and latitude/longitude coordinates.
TileID 31004006
SeaIcePercent Summary percentage of sea ice detected (0-100), or not a number (nan). 0


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 71.7250539598207
CharacteristicBinSize Meters per cell. 1.00270100e+03
GEOAnyAbnormal False
GEOEstMaxRMSError 50.0
DataColumns 951
DataRows 951
GlobalGridColumns 18069
GlobalGridRows 18069
NumberOfOverlapGranules Number of staged granules that were mapped into this tile 3
NumberOfInputGranules Total number of MOD29 input granules staged 3
CoverageCalculationMethod volume
AlgorithmPackageAcceptanceDate Algorithm descriptors 10-2004
AlgorithmPackageMaturityCode normal
AlgorithmPackageName MOD_PR29A1
AlgorithmPackageVersion 5
InstrumentName Moderate Resolution Imaging Spectroradiometer
PlatformShortName Terra
LongName MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Day
ProcessingDateTime 2006-09-09T04:23:43.000Z
ProcessingCenter MODAPS
ProcessingEnvironment Linux minion5055 #1 SMP Mon Nov 28 12:40:04 MST 2005 i686 Intel(R) Xeon(TM) CPU 2.80GHz unknown GNU/Linux
DescrRevision 5.0
SPSOParameters none
LocalInputGranuleID Names of input files


EastBoundingCoordinate Extent of swath coverage, in latitude and longitude -114.443954780417
WestBoundingCoordinate -127.874983651098
NorthBounding Coordinate 44.6837779373178
SouthBounding Coordinate 31.6002389831511


These attributes specify the content and structure of an HDF-EOS file and are not discussed further here. For more information, please see the 2001 white paper titled An HDF-EOS and Data Formatting Primer for the ECS Project.

Product Specific Attributes

These attributes are specific to the MOD29P1D and MYD29P1D sea ice product.

Attribute Name Comment Sample Value
HDFEOSVersion Version of HDF-EOS toolkit HDFEOS_V2.9
MOD29InputGranuleNames Listing of input files used to make the data product


SCF_Algorithm_Version SCF version tracking information

$Id: MOD_PR29A1_AAmain.c,v 1.10 2002/10/16 13:17:14 powell Exp $
$Id: MOD_PR29A1_ActionMessages.h,v 1.5 2002/08/08 19:33:37 powell Exp $
$Id: MOD_PR29A1.h,v 1.15 2002/10/16 13:58:10 powell Exp $
$Id: MOD_PR29A1_InputFiles.c,v 1.11 2002/12/11 20:56:04 powell Exp $
$Id: MOD_PR29A1_ComputeReflectance.c,v 1.8 2002/10/25 16:16:15 powell Exp $
$Id: MOD_PR29A1_ComputeSurfTemp.c,v 1.6 2002/10/16 13:20:27 powell Exp $
$Id: MOD_PR29A1_ProcessOutput.c,v 1.7 2002/10/09 12:57:53 powell Exp $
$Id: MOD_PR29A1_CopyInputMeta.c,v 1.9 2002/10/09 12:52:25 powell Exp $
$Id: MOD_PR29A1_CopySpatialDomainMeta.c,v 1.7 2002/10/09 12:53:22 powell Exp $
$Id: MOD_PR29A1_CodeMetaData.c,v 1.17 2002/10/09 12:09:11 powell Exp $