<?xml version="1.0" encoding="UTF-8"?><OAI-PMH xmlns="http://www.openarchives.org/OAI/2.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/ http://www.openarchives.org/OAI/2.0/OAI-PMH.xsd"><responseDate>2026-08-28T16:58:06Z</responseDate><request identifier="AQ3_ANSM.002" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/AQ3_ANSM.002</identifier><datestamp>2026-04-09T20:29:37Z</datestamp><setSpec>cumulus</setSpec><setSpec>retired</setSpec><setSpec>nasa_nsidc_daac</setSpec></header><metadata>
<DIF xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.7.1.xsd"><Entry_ID>AQ3_ANSM.002</Entry_ID><Entry_Title>Aquarius L3 Gridded 1-Degree Annual Soil Moisture</Entry_Title><Data_Set_Citation><Dataset_Creator>Bindlish, R. &amp; Jackson, T.</Dataset_Creator><Dataset_Title>Aquarius L3 Gridded 1-Degree Annual Soil Moisture</Dataset_Title><Dataset_Release_Date>2013-12-03</Dataset_Release_Date><Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place><Dataset_Publisher>NASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center</Dataset_Publisher><Version>2</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.5067/Aquarius/AQ3_ANSM.002</Dataset_DOI><Online_Resource>https://doi.org/10.5067/Aquarius/AQ3_ANSM.002</Online_Resource><Dataset_Series_Name>AQ3_ANSM</Dataset_Series_Name></Data_Set_Citation><Personnel><Role>Technical Contact</Role><First_Name>NSIDC</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Fax>1-303-492-2468</Fax><Contact_Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel><Parameters><Category>EARTH SCIENCE</Category><Topic>LAND SURFACE</Topic><Term>SOILS</Term><Variable_Level_1>SOIL MOISTURE/WATER CONTENT</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><ISO_Topic_Category>Environment</ISO_Topic_Category><Keyword>Aquarius</Keyword><Keyword>NASA</Keyword><Keyword>NSIDC</Keyword><Keyword>NSIDC DAAC</Keyword><Keyword>Radiometers</Keyword><Keyword>Scatterometer</Keyword><Keyword>Soil Moisture</Keyword><Sensor_Name><Short_Name>AQUARIUS_RADIOMETER</Short_Name><Long_Name>Aquarius Radiometer</Long_Name></Sensor_Name><Sensor_Name><Short_Name>AQUARIUS_SCATTEROMETER</Short_Name><Long_Name>Aquarius Scatterometer</Long_Name></Sensor_Name><Source_Name><Short_Name>SAC-D</Short_Name><Long_Name>Sat&#xE9;lite de Aplicaciones Cient&#xED;fico - D</Long_Name></Source_Name><Temporal_Coverage><Start_Date>2011-08-25</Start_Date><Stop_Date>2014-01-01</Stop_Date></Temporal_Coverage><Data_Set_Progress>deprecated</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>-90</Southernmost_Latitude><Northernmost_Latitude>90</Northernmost_Latitude><Westernmost_Longitude>-180</Westernmost_Longitude><Easternmost_Longitude>180</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>GEOGRAPHIC REGION</Location_Category><Location_Type>GLOBAL LAND</Location_Type></Location><Data_Resolution><Latitude_Resolution>1 Degree</Latitude_Resolution><Longitude_Resolution>1 Degree</Longitude_Resolution><Temporal_Resolution>1 year</Temporal_Resolution></Data_Resolution><Access_Constraints>These data have been retired and are no longer accessible, though a more recent version of these data may be available.</Access_Constraints><Use_Constraints>These data have been retired and are no longer available for use, though a more recent version of these data may be available. Cite any prior or planned use of these data according to the recommended citation at https://nsidc.org/about/data-use-and-copyright. For more information on the NASA ESDIS Data Use Guidance, see https://www.earthdata.nasa.gov/engage/open-data-services-software-policies/data-use-guidance.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Originating_Center>NASA/GSFC/SED/ESD/GCDC/OB.DAAC</Originating_Center><Data_Center><Data_Center_Name><Short_Name>NASA NSIDC DAAC</Short_Name><Long_Name>NASA National Snow and Ice Data Center Distributed Active Archive Center</Long_Name></Data_Center_Name><Data_Center_URL>https://nsidc.org/daac</Data_Center_URL><Personnel><Role>Data Center Contact</Role><First_Name>NSIDC</First_Name><Last_Name>User Services</Last_Name><Email>nsidc@nsidc.org</Email><Phone>1-303-492-6199</Phone><Contact_Address><Address>National Snow and Ice Data Center</Address><Address>CIRES, 449 UCB</Address><Address>University of Colorado</Address><City>Boulder</City><Province_or_State>CO</Province_or_State><Postal_Code>80309-0449</Postal_Code><Country>USA</Country></Contact_Address></Personnel></Data_Center><Distribution><Distribution_Media>FTP</Distribution_Media><Distribution_Size>262 KB</Distribution_Size><Distribution_Format>HDF</Distribution_Format></Distribution><Reference>Bindlish, Rajat, and Thomas J. Jackson. 2013. Aquarius Soil Moisture ATBD Users Guide, Version 2.0. Beltsville, Maryland USA: USDA Hydrology and Remote Sensing Lab.

Bindlish, Rajat, Thomas Jackson, Michael Cosh, Tianjie Zhao and Peggy O'Neill. 2013. Global Soil Moisture from the Aquarius Satellite: Description and Initial Assessment. IEEE Geosciences and Remote Sensing Letters (in review).

Fan, J. and I. Gijbels. 1996. Local Polynomial Modelling and its Applications, Chapman and Hall, 1996.

Jackson, T. J. 1993. Measuring Surface Soil Moisture Using Passive Microwave Remote Sensing. Hydrological Processes 7:139&#x2013;152.

Lilly, Jonathan and Gary Lagerloef. 2008. Aquarius Level 3 Processing Algorithm Theoretical Basis Document. ftp://podaac-ftp.jpl.nasa.gov/allData/aquarius/docs/v2/AquariusLevel3_GriddingSmoothingPaper_Lilly&amp;Lagerloef2008.pdf

Piepmeier, Jeffrey, Shannon Brown, Joel Gales, Liang Hong, Gary Lagerloef, David Le Vine, Paolo de Matthaeis, Thomas Meissner, Rajat Bindlish, and Thomas Jackson. 2013. Aquarius Radiometer Post-Launch Calibration for Product Version 2.0, Aquarius Project Document: AQ-014-PS-0015. ftp://podaac-ftp.jpl.nasa.gov/allData/aquarius/docs/v2/AQ-014-PS-0015_AquariusInstrumentCalibratrionDescriptionDocument.pdf.</Reference><Summary><Abstract>This data set contains Level-3 gridded annual global soil moisture estimates derived from the NASA Aquarius passive microwave radiometer on the Sat&#xE9;lite de Aplicaciones Cient&#xED;ficas (SAC-D).</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://doi.org/10.5067/Aquarius/AQ3_ANSM.002</URL><Description>User's Guide</Description></Related_URL><Related_URL><URL_Content_Type><Type>PROJECT HOME PAGE</Type></URL_Content_Type><URL>http://aquarius.nasa.gov/index.html</URL><Description>NASA GSFC JPL Aquarius Project Web Site</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/aquarius/index.html</URL><Description>Aquarius Soil Moisture Product Web Site</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2013-12-03</DIF_Creation_Date><Last_DIF_Revision_Date>2026-04-09</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value>Version 2 of the Aquarius L3 Soil Moisture data is the first version available from NSIDC.</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Level of Service</Name><Value><Level>No Data Access</Level></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Full Dataset Citation</Name><Value>Bindlish, R. &amp; Jackson, T. (2013). &lt;i&gt;Aquarius L3 Gridded 1-Degree Annual Soil Moisture&lt;/i&gt;. (AQ3_ANSM, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. &lt;a href="https://doi.org/10.5067/Aquarius/AQ3_ANSM.002"&gt;https://doi.org/10.5067/Aquarius/AQ3_ANSM.002&lt;/a&gt;. [&lt;i&gt;&lt;describe subset used if applicable&gt;&lt;/i&gt;].</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Retired</Name><Value>true</Value></Metadata></Extended_Metadata></DIF>
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