MOD10A2 and MYD10A2 Global Snow Cover Attributes, Version 5
The MODIS snow cover products 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. Many of 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 QA updates are only reflected in the metadata file.
Use the following links to navigate through this document:
- CoreMetadata.0 (Inventory metadata)
- ArchiveMetadata.0 (Archive Metadata)
- StructMetadata.0 (Structural Metadata)
- Product Specific Global Attributes
CoreMetadata.0
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 | MOD10A2 |
| VersionID | ECS Version | 5 |
| ReprocessingActual | Reprocessed or not reprocessed | reprocessed |
| ReprocessingPlanned | Expect that products will be reprocessed at least once | further update is anticipated |
| LocalGranuleID | MOD10A2.A2000129.h07v03.005.2006223085826.hdf | |
| DayNightFlag | Snow will have either Day or Both | Day |
| ProductionDateTime | Time granule was produced | 2006-08-11T08:58:31.000Z |
| LocalVersionID | Version of algorithm delivered from the Science Computing Facility (SCF) | SCF V5.0.0 |
| PGEVersion | Version of PGE in MODAPS | 5.0.6 |
| InputPointer | Names of input files | MOD10A1.A2000129.h07v03.005.2006206165829.hdf MOD10A1.A2000130.h07v03.005.2006207032309.hdf MOD10A1.A2000131.h07v03.005.2006207081316.hdf MOD10A1.A2000132.h07v03.005.2006208043936.hdf MOD10A1.A2000133.h07v03.005.2006207181915.hdf MOD10A1.A2000134.h07v03.005.2006208022537.hdf MOD10A1.A2000135.h07v03.005.2006208160657.hdf MOD10A1.A2000136.h07v03.005.2006208215150.hdf |
| RangeBeginningDate | Beginning date of the first data used in the product | 2000-05-08 |
| RangeBeginningTime | Beginning time of the first data used in the product | 00:00:00 |
| RangeEndingDate | Ending date of the last data used in the product | 2000-05-15 |
| RangeEndingTime | Ending time of the last data used in the product | 23:59:59 |
| ExclusionGringFlag | N | |
| GringPointLatitude | Geographic latitude bounds of tile coverage | 48.9382100186222 56.0388053943621 56.9789890577371 49.7514464176439 |
| GringPointLongitude | Geographic longitude bounds of tile coverage | -178.802776237407 178.45687533541 -154.197737435825 -155.613731035609 |
| GringPointSequenceNo | 1,2,3,4 | |
| ParameterName | Parameter for which QA statistics are given in this metadata object | Maximum Snow Extent |
| 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 | See http://landweb.nascom.nasa.gov/cgi-bin/QA_WWW/qaFlagPage.cgi?sat=terra for the product Science Quality status |
| QAPercentMissingData | 0-100 | 0 |
| QAPercentCloudCover | 0-100 | 1 |
| 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. Also, when using certain interfaces for tile numbers, these attributes may be used as search criteria to restrict searches.
Object Name |
Comments |
Sample Value |
| QAPercentGoodQuality | Summary quality assessment statistics for data product. Note: pixels identified as cloud are considered good quality | 100 |
| QAPercentOtherQuality | 0 | |
| HorizontalTileNumber | Horizontal position in Sinusoidal Grid (SIN) | 7 |
| VerticalTileNumber | Vertical position in SIN | 3 |
| TileID | Coded tile identifier | 51007003 |
| SnowCoverPercent | Summary percentage of snow-covered land | 9 |
ArchiveMetadata.0
These attributes contain information relevant to production of the data product. They also contain 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 | 15.0 | |
| CharacteristicBinSize | 463.312716527778 | |
| DataColumns | 2400 | |
| DataRows | 2400 | |
| GlobalGridColumns | 86400 | |
| GlobalGridRows | 43200 | |
| AlgorithmPackageAcceptanceDate | Algorithm descriptors | 01-2005 |
| AlgorithmPackageMaturityCode | Normal | |
| AlgorithmPackageName | MOD_PR10A2 | |
| AlgorithmPackageVersion | 5 | |
| InstrumentName | Moderate Resolution Imaging Spectroradiometer | |
| PlatformShortName | Terra | |
| ProcessingDateTime | 2006-08-11T08:58:26.000Z | |
| LongName | MODIS/Terra Snow Cover 8-Day L3 Global 500m SIN Grid | |
| ProcessingCenter | MODAPS | |
| SPSOParameters | None | |
| LocalInputGranuleID | Names of input files | MOD10A1.A2000129.h07v03.005.2006206165829.hdf, MOD10A1.A2000130.h07v03.005.2006207032309.hdf, MOD10A1.A2000131.h07v03.005.2006207081316.hdf, MOD10A1.A2000132.h07v03.005.2006208043936.hdf, MOD10A1.A2000133.h07v03.005.2006207181915.hdf, MOD10A1.A2000134.h07v03.005.2006208022537.hdf, MOD10A1.A2000135.h07v03.005.2006208160657.hdf, MOD10A1.A2000136.h07v03.005.2006208215150.hdf |
| EastBoundingCoordinate | Extent of tile coverage in latitude and longitude | -155.559418292319 |
| WestBoundingCoordinate | -179.999999964708 | |
| NorthBoundingCoordinate | 56.2583333282812 | |
| SouthBoundingCoordinate | 49.9999999955098 | |
| DescrRevision | Version of MCF used | 5.0 |
| ProcessingEnvironment | IRIX64 mtvs3 6.5 10070055 IP35 |
StructMetadata.0
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 Global Attributes
These attributes are specific to the MOD10A2 and MYD10A2 snow cover product.
Attribute Name |
Comment |
Sample Value |
| HDFEOSVersion | Version of HDF-EOS Toolkit | HDFEOS_V2.9 |
| Number of Input Days | Number of days input to the product (range 2-8) | 8 |
| Days Input | Year days of input in chronological order | 2000-129, 2000-130, 2000-131, 2000-132, 2000-133, 2000-134, 2000-135, 2000-136 |
| Eight Day Period | Days in the eight-day period | 2000-129, 2000-136 |
| SCF Algorithm Version | Internal SCF version | $Id: MOD_PR10A2.AAmain.c,v 1.7 2002/05/01 19:15:30 powell Exp $ |
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