<?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>2026-05-21T01:24:46Z</responseDate><request identifier="NSIDC-0340.001" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/NSIDC-0340.001</identifier><datestamp>2026-03-03T21:04:08Z</datestamp><setSpec>v0_daac</setSpec><setSpec>v0_all</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>NSIDC-0340.001</Entry_ID><Entry_Title>SMEX04 QuikSCAT/SeaWinds Backscatter Data: Sonora</Entry_Title><Data_Set_Citation><Dataset_Creator>Long, D. G.</Dataset_Creator><Dataset_Title>SMEX04 QuikSCAT/SeaWinds Backscatter Data: Sonora</Dataset_Title><Dataset_Release_Date>2008-04-30</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>1</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.5067/KUPSUNBZQ3ZQ</Dataset_DOI><Online_Resource>https://nsidc.org/sites/default/files/nsidc-0340-v001-userguide.pdf</Online_Resource><Dataset_Series_Name>NSIDC-0340</Dataset_Series_Name></Data_Set_Citation><Personnel><Role>Investigator</Role><First_Name>David</First_Name><Middle_Name>G.</Middle_Name><Last_Name>Long</Last_Name><Email>long@et.byu.edu</Email><Contact_Address><Address>459 Clyde Building</Address><City>Provo</City><Province_or_State>UT</Province_or_State><Postal_Code>84602</Postal_Code><Country>USA</Country></Contact_Address></Personnel><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>SPECTRAL/ENGINEERING</Topic><Term>MICROWAVE</Term><Variable_Level_1> </Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><Parameters><Category>EARTH SCIENCE</Category><Topic>SPECTRAL/ENGINEERING</Topic><Term>RADAR</Term><Variable_Level_1>RADAR BACKSCATTER</Variable_Level_1><Variable_Level_2> </Variable_Level_2><Variable_Level_3> </Variable_Level_3><Detailed_Variable> </Detailed_Variable></Parameters><ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category><Keyword>AMSR-E</Keyword><Keyword>AMSR-E Validation-project</Keyword><Keyword>QuikSCAT</Keyword><Keyword>Satellite</Keyword><Keyword>Satellite Imagery</Keyword><Keyword>Satellite Radar Data</Keyword><Keyword>Scatterometer</Keyword><Keyword>SMEX</Keyword><Keyword>SMEX04</Keyword><Keyword>Soil Moisture</Keyword><Keyword>Surface Layer Backscatter</Keyword><Keyword>Surface Soil Moisture</Keyword><Sensor_Name><Short_Name>SEAWINDS</Short_Name><Long_Name>SeaWinds Scatterometer</Long_Name></Sensor_Name><Source_Name><Short_Name>QUIKSCAT</Short_Name><Long_Name>QUIKSCAT</Long_Name></Source_Name><Temporal_Coverage><Start_Date>2004-06-01</Start_Date><Stop_Date>2004-09-30</Stop_Date></Temporal_Coverage><Data_Set_Progress>complete</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>20</Southernmost_Latitude><Northernmost_Latitude>35</Northernmost_Latitude><Westernmost_Longitude>-115</Westernmost_Longitude><Easternmost_Longitude>-105</Easternmost_Longitude></Spatial_Coverage><Location><Location_Category>Continent</Location_Category><Location_Type>North America</Location_Type><Location_Subregion1>Mexico</Location_Subregion1><Location_Subregion2/><Location_Subregion3/><Detailed_Location/></Location><Access_Constraints>These data are freely, openly, and fully accessible, provided that you are logged into your NASA Earthdata profile (https://urs.earthdata.nasa.gov/).</Access_Constraints><Use_Constraints>These data are freely, openly, and fully available to use without restrictions, provided that you cite the data according to the recommended citation at https://nsidc.org/about/use_copyright.html. For more information on the NASA EOSDIS Data Use Policy, see https://earthdata.nasa.gov/earth-observation-data/data-use-policy.</Use_Constraints><Data_Set_Language>English</Data_Set_Language><Originating_Center>NASA NSIDC 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>246 MB</Distribution_Size><Distribution_Format>GIF</Distribution_Format></Distribution><Distribution><Distribution_Media>HTTPS</Distribution_Media><Distribution_Size>246 MB</Distribution_Size><Distribution_Format>GIF</Distribution_Format></Distribution><Distribution><Distribution_Media>FTP</Distribution_Media><Distribution_Size>246 MB</Distribution_Size><Distribution_Format>SIR</Distribution_Format></Distribution><Distribution><Distribution_Media>HTTPS</Distribution_Media><Distribution_Size>246 MB</Distribution_Size><Distribution_Format>SIR</Distribution_Format></Distribution><Reference>Scatterometer Climate Record Pathfinder. 2007. http://www.scp.byu.edu/ 6 March 2008. 

Falcon, Peter and Cecelia Lawshe. 'Jet Propulsion Laboratory, California Institute of Technology.' Winds: Measuring Ocean Winds from Space. http://winds.jpl.nasa.gov/index.cfm 6 March 2008.

SMEX04: Soil Moisture Experiments in 2004. 28 April 2008. http://hydrolab.arsusda.gov/smex04/ 28 April 2008.</Reference><Summary><Abstract>This data set includes data collected by the SeaWinds scatterometer on NASA's Quick Scatterometer (QuikSCAT) satellite collected backscatter data.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://nsidc.org/sites/default/files/nsidc-0340-v001-userguide.pdf</URL><Description>SMEX04 QuikSCAT/SeaWinds Backscatter Data: Sonora, Version 1 User Guide</Description></Related_URL><Related_URL><URL_Content_Type><Type>GET DATA</Type></URL_Content_Type><URL>https://daacdata.apps.nsidc.org/pub/DATASETS/AVDM/data/soil_moisture/SMEX04/Sonora/satellite/QUIKSCAT/</URL><Description>HTTPS</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/amsr_validation/soil_moisture/index.html</URL><Description>SMEX Product Web Site</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/amsre/</URL><Description>AMSR-E/Aqua Data at NSIDC</Description></Related_URL><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>http://nsidc.org/data/amsr_validation/</URL><Description>AMSR-E Validation Data at NSIDC</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2008-04-30</DIF_Creation_Date><Last_DIF_Revision_Date>2026-03-03</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Current Version</Name><Value>1</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Level of Service</Name><Value><Level>Basic</Level></Value></Metadata><Metadata><Group>NSIDC</Group><Name>Full Dataset Citation</Name><Value>Long, D. G. (2008). &lt;i&gt;SMEX04 QuikSCAT/SeaWinds Backscatter Data: Sonora&lt;/i&gt;. (NSIDC-0340, Version 1). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. &lt;a href="https://doi.org/10.5067/KUPSUNBZQ3ZQ"&gt;https://doi.org/10.5067/KUPSUNBZQ3ZQ&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>false</Value></Metadata></Extended_Metadata></DIF>
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