2024-03-28T12:45:54Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/SPL4SMLM.0012024-01-25T13:16:56Zecsretirednasa_nsidc_daac
SPL4SMLM.001SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model ConstantsReichle, R., G. De Lannoy, R. D. Koster, W. T. Crow, and J. S. Kimball.SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants2015-10-30Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center1false10.5067/ORO7MNBKY525https://doi.org/10.5067/ORO7MNBKY525SPL4SMLMTechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAEARTH SCIENCELand SurfaceSoilsSoil Moisture/Water Content SOIL MOISTURE/WATER CONTENTClimatology/Meteorology/AtmosphereGeoscientific InformationMODELSRADIOMETERSMAP-projectSoil MoistureSoil Moisture Active PassiveSMAP L-BAND RADIOMETERSMAP L-BAND RADIOMETERSMAP ObservatorySoil Moisture Active and Passive Observatory2015-03-312015-10-26complete-85.04485.044-180180Geographic RegionGlobal Land9 km9 km3 hourSMAPSoil Moisture Active PassiveVersion 1 Beta data employ preliminary algorithms that are still being validated and are thus subject to uncertainties.These data are offered free of charge. You may use these data freely, provided that you cite NSIDC DAAC as the source, and provide an acknowledgment in any published papers.EnglishNASA/JPL/SMAPNASA NSIDC DAACNASA National Snow and Ice Data Center Distributed Active Archive Centerhttps://nsidc.org/daacData Center ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-6199National Snow and Ice Data CenterCIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAFTP36 MBHDF5HTTPS36 MBHDF5Brodzik, M. J., B. Billingsley, T. Haran, B. Raup, and M. H. Savoie. 2012. EASE-Grid 2.0: Incremental but Significant Improvements for Earth-Gridded Data Sets. ISPRS Int. J. Geo-Inf. 1(1):32-45. http://dx.doi.org/10.3390/ijgi1010032.
Brodzik, M. J., B. Billingsley, T. Haran, B. Raup, and M. H. Savoie. 2014. Correction: Brodzik, M. J. et al. EASE-Grid 2.0: Incremental but Significant Improvements for Earth-Gridded Data Sets. ISPRS Int. J. Geo-Inf 2012. 1(1):32-45 ISPRS Int. J. Geo-Inf. 3(3):1154-1156. http://dx.doi.org/10.3390/ijgi3031154.
Entekhabi, D. et al. 2014. SMAP Handbook–Soil Moisture Active Passive: Mapping Soil Moisture and Freeze/Thaw from Space. Pasadena, CA USA: SMAP Project, JPL CL#14-2285, Jet Propulsion Laboratory.
Entekhabi, D., R. H. Reichle, R. D. Koster, and W. T. Crow. 2010. Performance Metrics for Soil Moisture Retrievals and Application Requirements. Journal of Hydrometeorology. 11:832–840. http://dx.doi.org/10.1175/2010JHM1223.1.
Reichle, R. et al. 2015a. Soil Moisture Active Passive (SMAP) Mission Level 4 Surface and Root Zone Soil Moisture (L4_SM) Product Specification Document. SMAP Project, Global Modeling and Assimilation Office, Goddard Space Flight Center, Greenbelt, MD, USA. (http://nsidc.org/data/docs/daac/smap/sp_l4_sm/pdfs/SMAP_L4_SM_PSD_v1.4_beta-release.pdf, 1.7 MB)
Reichle, R., G. De Lannoy, Q. Liu, A. Colliander, A. Conaty, T. Jackson, J. Kimball, and R. Koster. 2015b. Soil Moisture Active Passive (SMAP) Project Assessment Report for the Beta- Release L4_SM Data Product. Global Modeling and Assimilation Office, Goddard Space Flight Center, Greenbelt, MD, USA. NASA/TM-2015-104606, Vol. 40. (http://nsidc.org/data/docs/daac/smap/sp_l4_sm/pdfs/SMAP_L4_SM_Beta-Release_Assessment_Report_V40.pdf, 5.7 MB)
Reichle, R. et al. 2014a. SMAP Algorithm Theoretical Basis Document: L4 Surface and Root-Zone Soil Moisture Product. SMAP Project, JPL D-66483, Jet Propulsion Laboratory, Pasadena, CA, USA. (http://nsidc.org/data/docs/daac/smap/sp_l4_sm/pdfs/272_L4_SM_RevA_web.pdf, 1.4 MB)
Reichle, R. H., and Q. Liu. 2014b. Observation-Corrected Precipitation Estimates in GEOS-5. SMAP Project, Global Modeling and Assimilation Office, Goddard Space Flight Center, Greenbelt, MD, USA. NASA/TM–2014-104606, Vol. 35. (http://gmao.gsfc.nasa.gov/pubs/docs/Reichle734.pdf, 495 KB).This document describes the SMAP Level-4 Surface and Root Zone Soil Moisture (SPL4SM) data product, which consists of:
<ul>
<li>SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Geophysical Data (SPL4SMGP)</li>
<li>SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Analysis Update (SPL4SMAU)</li>
<li>SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants (SPL4SMLM)</li>
</ul>
For each product, input SMAP L-band brightness temperatures from descending and ascending half-orbit satellite passes (approximately 6:00 a.m. and 6:00 p.m. local solar time, respectively) are assimilated into a land surface model that is gridded using an Earth-fixed, global, cylindrical 9 km Equal-Area Scalable Earth Grid, Version 2.0 (EASE-Grid 2.0) projection.
<p><strong>Note:</strong> These data are Beta-release quality, meaning that they have not undergone full validation and may still contain significant errors. </p>VIEW RELATED INFORMATIONhttps://doi.org/10.5067/ORO7MNBKY525DocumentationGET DATAhttps://nsidc.org/data/data-access-tool/SPL4SMLM/versions/1/Data Access ToolVIEW RELATED INFORMATIONhttp://nsidc.org/data/smap/index.htmlSMAP Data at NASA NSIDC DAACVIEW RELATED INFORMATIONhttp://nsidc.org/data/smap/validation/val-data.htmlSMAP Validation Data at NASA NSIDC DAACPROJECT HOME PAGEhttp://smap.jpl.nasa.gov/SMAP Web Site at the Jet Propulsion LaboratoryVIEW RELATED INFORMATIONhttps://www.asf.alaska.edu/smap/SMAP Data at NASA ASF DAACVIEW RELATED INFORMATIONhttp://nsidc.org/data/docs/daac/smap/sp_l4_sm/pdfs/272_L4_SM_RevA_web.pdfAlgorithm Theoretical Basis Document (ATBD)CEOS IDN DIFVERSION 9.92015-10-302024-01-25NSIDCVersion SummaryFirst public data releaseNSIDCMinor VersionVb1010First public data release2015-04-011Vb1012Input data source changed from SPL1CTB V1 Beta data to SPL1CTB V2 Validated-Stage 1 data.2015-10-262NSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationReichle, R., G. De Lannoy, R. D. Koster, W. T. Crow, and J. S. Kimball. 2015. <i>SMAP L4 9 km EASE-Grid Surface and Root Zone Soil Moisture Land Model Constants.</i> [indicate subset used]. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/ORO7MNBKY525">https://doi.org/10.5067/ORO7MNBKY525</a>. [Date Accessed].NSIDCRetiredtrueNSIDCRelated Servicesapplication/vnd.nasa.cmr.umm+jsonfalsejroebuckmmt_service_14455S2011758375-NSIDC_ECSNSIDC_ECS6service2023-05-11T22:55:27.797Zhttps://n5eil02u.ecs.nsidc.org/egi/requestNSIDC_ECS_EGI_API_SMAP_L3L4ESI23.1Customized Programmatic Data Access ServiceProgrammatically request selected data products through our API. This tool is valuable for selecting just the parameters you need from big data sets. Apply spatial and temporal filters, subsetting, reformatting, and reprojection.https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.orgESRIGeoJSONKMLfalsetrueHDF5ASCIIGEOTIFFHDF-EOS5HDF5KMLNETCDF-4WGS 84 / NSIDC EASE-Grid NorthEPSG:6931WGS 84 / NSIDC EASE-Grid GlobalEPSG:6933WGS 84 / NSIDC EASE-Grid SouthEPSG:6932GeographicEPSG:4326Universal Transverse MercatorPolar Stereographic2023-04-19T00:00:00.000ZDATA INTEROPERABILITYDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA REFORMATTINGDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA CUSTOMIZATIONDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESREPROJECTIONSUBSETTING/SUPERSETTINGDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESSPATIAL SUBSETTINGSUBSETTING/SUPERSETTINGDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESVARIABLE SUBSETTINGThis is the most current release of this service.SERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC home page.DEVELOPERORIGINATORPUBLISHERMaintenance and Development, Earth Observing System Data and Information System, Earth Observing System,Goddard Space Flight Center, NASANASA/GSFC/EOS/EOSDIS/EMDEOSDIS Core System Maintenance and Developmenthttps://earthdata.nasa.gov/eosdisEOSDIS home page.https://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesapplication/vnd.nasa.cmr.umm+jsonfalsetdwilliaNSIDC_ECS_PROD_ECHO_ORDERS_serviceS1568899363-NSIDC_ECSNSIDC_ECS8service2023-05-31T15:37:55.746Zhttps://n5eil02u.ecs.nsidc.org/ops/cobi/ECHO ORDERS Service for NSIDC_ECS EOSDIS Service ImplementationNSIDC_ECS_ECHO_ORDERSECHO ORDERS1NSIDC_ECS EOSDIS ECHO ORDERS Service ImplementationNSIDC_ECS EOSDIS ECHO ORDERS Service ImplementationAvailableNONEDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESDATA DELIVERYDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESNONEPUBLISHERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA/NSIDChttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://n5eil02u.ecs.nsidc.org/ops/cobi/application/vnd.nasa.cmr.umm+jsonfalseamy.steikermmt_service_12641S1977894169-NSIDC_ECSNSIDC_ECS9service2022-07-01T18:43:22.565Zhttps://n5eil01u.ecs.nsidc.org/NSIDC_ECS_DAAC_HTTPS_File_SystemNOT PROVIDED20.2HTTPS File SystemQuickly download a few files using a web browser, or access data through a command-line utility such as WGET.https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesVIEW RELATED INFORMATIONProgrammatic Data Access GuidePublicationURLUSER SERVICESNSIDC DAAC User ServicesEmailnsidc@nsidc.org2020-10-21T00:00:00.000ZDATA ACCESS/RETRIEVALDATA MANAGEMENT/DATA HANDLINGEARTH SCIENCE SERVICESThis is the most current release of this service.ORIGINATORPUBLISHERSERVICE PROVIDERNASA National Snow and Ice Data Center Distributed Active Archive CenterNASA NSIDC DAACNASA Distributed Active Archive Center (DAAC) at NSIDChttps://nsidc.org/daacNSIDC DAAC home pageDEVELOPERMaintenance and Development, Earth Observing System Data and Information System, Earth Observing System,Goddard Space Flight Center, NASANASA/GSFC/EOS/EOSDIS/EMDhttps://cdn.earthdata.nasa.gov/umm/service/v1.4UMM-S1.4https://nsidc.org/support/how/how-do-i-programmatically-request-data-servicesNSIDCRelated Toolsapplication/vnd.nasa.cmr.umm+jsonfalseamy.steikermmt_tool_12821TL1977971361-NSIDC_ECSNSIDC_ECS6tool2022-07-01T18:41:00.427ZGOTO WEB TOOLhttps://search.earthdata.nasa.gov/searchDistributionURLNSIDC_ECS_NASA_Earthdata_SearchWeb User Interface1NASA Earthdata SearchSearch and order data from all NASA DAACs using spatial and temporal filters in a map interface. 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