Metadata Fields - SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture

This page provides a description of all metadata fields within the SMAP L3 Radar Global Daily 3 km EASE-Grid Soil Moisture (SPL3SMA) product. All metadata fields are described in Table 1.

For a description of data fields for this product, refer to the Data Fields document.

Table 1. Description of File Level Metadata Fields
Representative ISO Class SMAP HDF5 Metadata Subgroup SMAP HDF5 Sub-path SMAP HDF5 Attribute Description/Valid Values1

MD_AcquisitionInformation

AcquisitionInformation

platform

antennaRotationRate

<The antenna rotation rate in revolution per minute (rpm)>

description

The SMAP observatory houses an L-band radiometer that operates at 1.40 GHz and an L-band radar that operates at 1.26 GHz.  The instruments share a rotating reflector antenna with a 6 meter aperture that scans over a 1000 km swath.  The bus is a 3 axis stabilized spacecraft that provides momentum compensation for the rotating antenna.

identifier

SMAP

radar,
radiometer

description

The SMAP radar instrument employs an L-band conically scanned system and SAR processing techniques to achieve moderate resolution (1 km) backscatter measurements over a very wide 1000 km swath.

identifier

SMAP SAR

type

L-band Synthetic Aperture Radar

edition

platformDocument,
radarDocument,
radiometerDocument

<The edition of publication of the reference document, if available to the general public.>

publicationDate

<The date of publication of the reference document, if available to the general public.>

title

<The title of the publication of the reference document, if available to the general public.>

evaluationMethodType

<The type of data quality evaluation method. "directInternal" means the method of evaluating the quality of a dataset based on inspection of items within the dataset, where all data required is internal to the dataset being evaluated.>

DQ_DataQuality

DataQuality

DomainConsistency

measureDescription

<The description of the Domain Consistency measurement.>

nameOfMeasure

<The name of the measurements>

unitOfMeasure

Percent

value

<A measure between 0 and 100>

CompletenessOmission

evaluationMethodType

<The type of data quality evaluation method. "directInternal" means the method of evaluating the quality of a dataset based on inspection of items within the dataset, where all data required is internal to the dataset being evaluated.>

measureDescription

<The description of the Completeness Omission measurement.>

nameOfMeasure

Percent of Missing Data

unitOfMeasure

Percent

value

<A measure between 0 and 100>

scope

<A list of data elements of the product, that are used for DataQuality measurement>

DS_Dataset/MD_DataIdentification

DatasetIdentification

CompositeReleaseID

<SMAP Composite Release ID associated with this data product>

ECSVersionID

<Identifier that specifies major version delivered to ECS (EOSDIS Core System).  Value runs from 001 to 999>

SMAPShortName

<The SMAP Mission product short name of this data product.>

UUID

<A universally unique identifier for each data granule.>

abstract

<A short description of this data product.>

characterSet

utf8

creationDate

<Date when this data product file was created>

credit

<Identify the institutional authorship of the product generation software and the data system that automates its production.>

fileName

<The name of this data product file.>

language

eng

originatorOrganizationName

Jet Propulsion Laboratory

otherCitationDetails

<The description of the state of the product generation software for this data product file.>

purpose

<The description of the purpose of this data product file.>

shortName

<The ECS short name of this data product in 8 characters.>

spatialRepresentationType

grid

status

onGoing

topicCategory

geoscientificInformation

EX_Extent

Extent

description

<The description of the spatial and temporal extents of the data product.>

eastBoundLongitude

<The most eastern boundary of the spatial extent the data product covers (Longitude measure between -180 degrees and 180 degrees)>

northBoundLatitude

<The most northern boundary of the spatial extent the data product covers (Latitude measure between -90 degrees and 90 degrees)>

rangeBeginningDateTime

<Character string that indicates the date and time of the initial data element in the product>

rangeEndingDateTime

<Character string that indicates the date and time of the final data element in the product.>

southBoundLatitude

<The most southern boundary of the spatial extent the data product covers (Latitude measure between -90 degrees and 90 degrees)>

westBoundLongitude

<The most western boundary of the spatial extent the data product covers (Longitude measure between -180 degrees and 180 degrees)>

MD_GridSpatialRepresentation

GridSpatialRepresentation

GridDefinitionDocument

edition

<The version of the grid definition document>

publicationDate

<The publication date of the grid definition document>

title

<The title of the grid definition document>

Column,
Row

dimensionSize

<The size of the dimension of the arrays in this specific projection are organized in this data product file>

resolution

<The spatial resolution each data point represents, in kilometer>

GridDefinition

description

<The description of the grid definition applied for the data product generation>

identifier

<The short name identifying the grid definition of this data product>

cellGeometry

<Indication of grid data as point or area>

controlPointAvailability

<Indication of whether or not control points are available (0 implies not available and 1 implies available)>

georeferencedParameters

<The parameters used for the conversion of the geographic location information to the map projection of interest>

numberOfDimensions

<The number of dimensions of the arrays in this specific projection are organized in this data product file>

orientationParameterAvailability

<Indication of whether or not orientation parameters are available (0 implies not available and 1 implies available)>

transformationParameterAvailability

<The indication of whether the parameters for transformation exists or not (0 implies not available and 1 implies available)>

LI_Lineage/LE_Source

Lineage

EASEGRID_LON_M,
InputConfiguration,
MetadataConfiguration,
OutputConfiguration,
RunConfiguration

creationDate

<Date when the corresponding ancillary input file was created>

description

<Description of each ancillary input file used to generate this data product.>

fileName

<The name of the ancillary input file.>

version

<The version number of the ancillary input file.>

L2_SM_A

DOI

<A digital object identifier associated with the input product.  This field appears only for the Lineage class that describes the SMAP science data product.>

creationDate

<Date when the corresponding input product file was created>

description

<Description of each of the input files used to generate this data product.>

fileName

<The name of the corresponding input product file.>

identifier

<The short name associated with the input SMAP science data product.>

resolution

<The spatial resolution each data point represents, in kilometer>

version

<The SMAP Composite Version ID associated with the input data product.>

SD_OrbitMeasuredLocation

OrbitMeasuredLocation

startRevNumber

<The lowest orbit number among the input product granules>

stopRevNumber

<The highest orbit number among the input product granules>

LI_Lineage/LE_ProcessStep

ProcessStep

ATBDDate

<Time stamp that specifies the release date of the ATBD>

ATBDTitle

<The title of the ATBD>

ATBDVersion

<Version identifier for the ATBD.>

SWVersionID

<A software version identifier that runs from 001 to 999>

algorithmDate

<Date associated with current version of the algorithm.>

algorithmDescription

<Descriptive text about the algorithm(s) in the product generation software for this data product.>

algorithmTitle

<The representative name of the algorithm for this data product.>

algorithmVersionID

<Identifier that specifies the current algorithm version.  Value runs from 001 to 999>

documentDate

<Release date for the software description document.>

documentVersion

<Version identifier for the software description document.>

documentation

<A reference to software description document.>

epochJulianDate

<Julian Date of the Epoch J2000, 2451545>

epochUTCDateTime

<UTC Date Time of the Epoch J2000, 2000-01-01T11:58:55.816Z>

identifier

<Name of the product generation software for this data product>

parameterVersionID

<Identifier that specifies the current version of processing parameters.  Value runs from 001 to 999.>

processDescription

<Short description of the data processing concept by the product generation software.>

processor

<Name of the product generation facility>

softwareDate

<A date stamp that specifies when software used to generate this product was released.>

softwareTitle

<The title of the product generation facility>

stepDateTime

< A character string that specifies the date and the time when the product was generated.>

timeVariableEpoch

<The Epoch of the time variable for the SMAP mission>

DS_Series/MD_DataIdentification

ProductSpecificationDocument

SMAPShortName

<The SMAP Mission product short name of this data product.>

characterSet

utf8

edition

<Edition identifier for the Product Specification Document>

language

eng

publicationDate

<Date of publication of the Product Specification Document>

title

<The title of the product specification document>

DQ_DataQuality

QA

MissingSamples

<The number of samples missing in this data products>

OutOfBoundsSamples

<The number of samples that are exceeding the predefined boundary>

QAPercentOutOfBoundsData

<Percent of the samples that are exceeding the predefined boundary with respect tot the total samples in this data product>

TotalSamples

<The number of all samples in this data product>

DS_Dataset/MD_DataIdentification

QADatasetIdentification

abstract

An ASCII product that contains statistical information on data product results.  These statistics enable data producers and users to assess the quality of the data in the data product granule.

creationDate

<The date that the QA product was generated.>

fileName

<The name of QA product.>

DS_Series/MD_DataIdentification

SeriesIdentification

CompositeReleaseID

<SMAP Composite Release ID that identifies the release used to generate this data product>

ECSVersionID

<Identifier that specifies major version delivered to ECS.  Value runs from 001 to 999>

abstract

<A short description of this data product series.>

characterSet

utf8

credit

<Identify the institutional authorship of the product generation software and the data system that automates its production.>

format

HDF5

formatVersion

<The version of the HDF5 library used for the product generation>

identifier_product_DOI

<digital object identifier for the Level 1C S0 HiRes Product>

language

eng

longName

<The long name of this data product (up to 80 characters long)>

maintenanceAndUpdateFrequency

asNeeded

maintenanceDate

<Specifies a date when the next update to this product might be anticipated>

mission

Soil Moisture Active Passive (SMAP)

otherCitationDetails

<The description of the state of the product generation software for this data product file.>

pointOfContact

<The name of the DAAC this data product is distributed from.>

purpose

<The description of the purpose of this data product file.>

resourceProviderOrganizationName

National Aeronautics and Space Administration

revisionDate

<Date and time of the software release that was used to generate this data product.>

shortName

<The ECS short name of this data product in 8 characters.>

spatialRepresentationType

grid

status

onGoing

topicCategory

geoscientificInformation

1 Brackets indicate a description of potential valid values, not an absolute value. For example, valid values for the Subgroup algorithmVersionID range from 001 to 999, which is indicated by the following description: <An algorithm version identifier that runs from 001 to 999>