MOD29E1D and MYD29E1D Global Sea Ice Attributes, Version 5

The MOD29E1D and MYD29E1D 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. MOD29E1D
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 MOD29E1D.A2000070.005.2006256010347.hdf
DayNightFlag Can be Day, Night, or Both. Day
ProductionDateTime Time granule was produced. 2006-09-13T01:03:47.000Z
LocalVersionID Version of algorithm delivered from the Science Computing Facility (SCF). SCF V5.0.0
PGEVersion Version of production generation executable. 5.0.4
InputPointer Location of the three input files in the production system. "/MODAPSops3/archive/f2/running/...
RangeBeginningDate Beginning date of the first scan line in the swath. 2000-03-10
RangeBeginningTime Beginning time of the first scan line in the swath. 00:00:00
RangeEndingDate Ending date of the last scan line in the swath. 2000-03-10
RangeEndingTime Ending time of the last scan line in the swath. 23:59:59
ParameterName Parameter for which QA statistics are given in this metadata object. Sea_Ice_by_Reflectance_NP
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.
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
QAPercentMissingData Summary quality assessment statistic based on the thermal data. Range is 0-100. 7
QAPercentCloudCover 31


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 180.0
WestBoundingCoordinate -180.0
NorthBounding Coordinate 90.0
SouthBounding Coordinate -90.0
AlgorithmPackageAcceptanceDate Algorithm descriptors 12-2004
AlgorithmPackageMaturityCode normal
AlgorithmPackageName MOD29_PR29 Terra or Aqua full and coarse products
AlgorithmPackageVersion 5
InstrumentName Moderate Resolution Imaging SpectroRadiometer
PlatformShortName Terra
ProcessingDateTime 2006-09-12T21:03:41.000000Z
LongName MODIS/Terra Sea Ice Extent and IST Daily L3 Global 4km
ProcessingCenter MODAPS
SPSOParameters none
LocalityValue   Global
DESCRRevision Version of Metadata Configuration File (MCF) 5.0
CharacteristcBinAngularSize   287.936014219062
CharacteristicBinSize   4.01080400e+03
GlobalGridColumns   4501
GlobalGridRows   4501
NumberOfInputGranules   209
ProcessingEnvironment   IRIX64 mtvs3 6.5 10070055 IP35


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 MOD29E1D and MYD29E1D sea ice product.

Attribute Name Comment Sample Value
L1BCalibrationQuality marginal
L1BMissionPhase A&E
L1BNadirPointing Yes
L1BVersionID Version of L1B processing algorithm 2000-11-01
L1BAutoQA_EV_1KM_RefsB Result of generalized quality analysis of L1B data Suspect
SCFAlgorithmVersion SCF versioning tracking information $Id: MOD_PR29_AA...