MOD29P1N and MYD29P1N Global Sea Ice Attributes, Version 5

The MOD29P1N and MYD29P1N 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. MOD29P1N
VersionID ECS Version. 5
ReprocessingActual Number of times processed. reprocessed
ReprocessingPlanned Expect that products will be reprocessed at least once. further update is anticipated
LocalGranuleID Name of the granule. MOD29P1N.A2000057.h12v07.005.2006252061042.hdf
DayNightFlag Can be Day, Night, or Both. Night
ProductionDateTime Time granule was produced. 2006-09-09 06:10:43.0
LocalVersionID Version of algorithm delivered from the Science Computing Facility (SCF). SCF 5.0.0
PGEVersion Version of Production Generation Executable (PGE). 5.0.2
InputPointer Input granules used to produce the granule. MODPTPGN.A2000057.h12v07.005.2006252060946.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. 11:15:00.0000000
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. 14:40:00.0000000
OrbitNumber 1021
EquatorCrossingDate 2000-02-26
EquatorCrossingTime 11:51:03.0297930
EquatorCrossingLongitude -16.5692929037397
ParameterName Parameter for which QA statistics are given in this metadata object. Ice_Surface_Temperature
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
ScienceQualityFlag Set by snow investigator after post-production investigation. Not investigated
ScienceQualityFlagExplanation Explanation of Science Flag. Visit for the product Science Quality status.
QAPercentMissingData 0-100 0
QAPercentCloudCover 0-100 0
AssociatedSensorShortName   MODIS
AssociatedPlatformShortName   Terra
AssociatedInstrumentShortName   MODIS

CoreMetadata.0 Product Specific Attributes (PSAs)

The CoreMetadata.0 product specific metadata attributes can be found by using most search tools. Also, when using certain interfaces for tile numbers, these attributes may be used as search criteria to restrict searches.

Object Name
Sample Value
QAPercentGoodQuality Summary quality assessment statistic based on the thermal data. Range is 0-100. 0
QAPercentOtherQuality 100
HorizontalTileNumber 12
VerticalTileNumber 7
TileID   31012007
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
EastBoundingCoordinate Extent of swath coverage in latitude and longitude 135.0
WestBoundingCoordinate 113.198590513648
NorthBounding Coordinate 64.7960762144739
SouthBounding Coordinate 52.4475198207961
AlgorithmPackageAcceptanceDate Algorithm descriptors 10-2004
AlgorithmPackageMaturityCode Normal
AlgorithmPackageName MOD_PR29A1
AlgorithmPackageVersion 5
InstrumentName Moderate-Resolution Imaging SpectroRadiometer
PlatformShortName Terra
ProcessingDateTime 2006-09-09T06:10:42.000Z
LongName MODIS/Terra Sea Ice Extent Daily L3 Global 1km EASE-Grid Night
ProcessingCenter MODAPS
SPSOParameters none
LocalInputGranuleID Names of input files MOD29PGN.A2000057.h12v07.005.2006252061025.hdf, MODPTPGN.A2000057.h12v07.005.2006252060946.hdf
DESCRRevision Version of Metadata Configuration File (MCF) 5.0
CharacterIsticBinAngularSize   71.7250539598207
CharacteristicBinSize Meters per cell 1.00270100e+03
GeoanyAbnormal   True
GeoEstMaxRMSError   50.0
DataColumns   951
DataRows   951
GlobalGridColumns   18069
GlobalGridRows   18069
NumberOfOverlapGranules   5
NumberOfInputGranules   13
CoverageCalculationMethod   volume
ProcessingEnvironment   Linux minion5051 #1 SMP Mon Nov 28 12:40:04 MST 2005 i686 Intel(R) Xeon(TM) CPU 2.80GHz unknown GNU/Linux


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 MOD29P1N and MYD29P1N sea ice product.

Attribute Name Comment Sample Value
HDFEOS Version Version of HDF-EOS Toolkit HDFEOS_V2.9
MOD29 InputGranuleNames Listing of input files used to make the data product MOD29.A2000057.1115.005.2006251051050.hdf
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_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 $