MOD29 and MYD29 Global Sea Ice Attributes, Version 5
The MOD29 and MYD29 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.
Use the following links to navigate through this document:
- CoreMetadata.0 (Inventory metadata)
- ArchiveMetadata.0 (Archive Metadata)
- StructMetadata.0 (Structural Metadata)
- Product Specific 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. | MOD29 |
| 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 | MOD29.A2000055.1630.005.2006251012020.hdf | |
| DayNightFlag | Can be Day, Night, or Both. | Night |
| ProductionDateTime | Time granule was produced. | 2006-09-08T01:20:21.000Z |
| LocalVersionID | Version of algorithm delivered from the Science Computing Facility (SCF). | SCF V5.0.1 |
| PGEVersion | Version of the Production Generation Executable (PGE). | 5.0.5 |
| InputPointer | Location of the three input files in the production system. | MOD021KM.A2000055.1630.005.2006251011238.hdf MOD35_L2.A2000055.1630.005.2006251011455.hdf MOD03.A2000055.1630.005.2006250020046.hdf |
| RangeBeginningDate | Beginning date of the first scan line in the swath. | 2000-02-24 |
| RangeBeginningTime | Beginning time of the first scan line in the swath. | 16:30:00.000000 |
| RangeEndingDate | Ending date of the last scan line in the swath. | 2000-02-24 |
| RangeEndingTime | Ending time of the last scan line in the swath. | 16:35:00.000000 |
| ExclusionGringFlag | N | |
| GringPointLatitude | Geographic latitude bounds of swath coverage. | 70.8882777954628 63.2943859872835 70.9129247178789 87.5238969788292 |
| GringPointLongitude | Geographic longitude bounds of swath coverage. | 103.651253274833 49.559073705244 5.30690667501476 170.111477089197 |
| GringPointSequenceNo | 1, 2, 3, 4 | |
| OrbitNumber | 995 | |
| EquatorCrossingLongitude | -93.8082345793327 | |
| EquatorCrossingDate | 2000-02-24 | |
| EquatorCrossingTime | 16:59:59.017095 | |
| ParameterName | Parameter for which QA statistics are given in this metadata object. | 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 |
| ScienceQualityFlag | Set by snow investigator after post-production investigation. | Not investigated |
| ScienceQualityFlagExplanation | Explanation of Science Flag. | Visit 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 | 78 |
| AncillaryInputPointer | Location of geolocation input product in production system. | MOD03.A2000055.1630.005.2006250020046.hdf |
| AncillaryInputType | Type of ancillary data referenced by pointer. | Geolocation |
| 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 |
Comments |
Sample Value |
| QAPercentGoodQuality | Summary quality assessment statistic based on the thermal data. Range is 0-100. | 100 |
| QAPercentOtherQuality | 0 | |
| GranuleNumber | Unique granule identifier. | 200 |
| SeaIcePercent | Summary percentage of sea ice detected (0-100), or not a number (nan). | nan |
ArchiveMetadata.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 | 160.930189011806 |
| WestBoundingCoordinate | 5.34047068143603 | |
| NorthBounding Coordinate | 89.0155141245487 | |
| SouthBounding Coordinate | 63.2960890323115 | |
| AlgorithmPackageAcceptanceDate | Algorithm descriptors | 05-2005 |
| AlgorithmPackageMaturityCode | Normal | |
| AlgorithmPackageName | MOD29_PR29 | |
| AlgorithmPackageVersion | 5 | |
| InstrumentName | Moderate-Resolution Imaging SpectroRadiometer | |
| PlatformShortName | Terra | |
| ProcessingDateTime | 2006-09-08T01:20:21.000Z | |
| LongName | MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km | |
| Processing Center | MODAPS | |
| SPSOParameters | none | |
| LocalInputGranuleID | Names of the three input files | MOD021KM.A2000055.1630.005.2006251011238.hdf MOD35_L2.A2000055.1630.005.2006251011455.hdf MOD03.A2000055.1630.005.2006250020046.hdf |
| DESCRRevision | Version of Metadata Configuration File (MCF) | 5.0 |
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 Attributes
These attributes are specific to the MOD29 and MYD29 sea ice product.
| Attribute Name | Comment | Sample Value |
| L1BCalibrationQuality | marginal | |
| L1BMissionPhase | EXECUTION | |
| L1BNadirPointing | Y | |
| L1BVersionID | Version of L1B processing algorithm | 2000-02-24 |
| L1BAutoQA_EV_1KM_RefsB | Result of generalized quality analysis of L1B data | Suspect |
| SCFAlgorithmVersion | SCF versioning tracking information | $Id: MOD_PR29_AA... |
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