<?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>2026-05-30T23:54:40Z</responseDate><request identifier="AE_SI6.003" metadataPrefix="dif" verb="GetRecord">http://nsidc.org/api/dataset/metadata/oai</request><GetRecord><record><header><identifier>oai:nsidc.org/AE_SI6.003</identifier><datestamp>2026-03-24T21:16:44Z</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>AE_SI6.003</Entry_ID><Entry_Title>AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids</Entry_Title><Data_Set_Citation><Dataset_Creator>Cavalieri, D. J., Markus, T. &amp; Comiso, J. C.</Dataset_Creator><Dataset_Title>AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids</Dataset_Title><Dataset_Release_Date>2014-07-01</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>3</Version><Other_Citation_Details><Invert_Citation_Order>false</Invert_Citation_Order></Other_Citation_Details><Dataset_DOI>10.5067/AMSR-E/AE_SI6.003</Dataset_DOI><Online_Resource>https://nsidc.org/sites/default/files/ae_si6-v003-userguide.pdf</Online_Resource><Dataset_Series_Name>AE_SI6</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>SPECTRAL/ENGINEERING</Topic><Term>MICROWAVE</Term><Variable_Level_1>BRIGHTNESS TEMPERATURE</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>AE_SI6</Keyword><Keyword>AMSR-E</Keyword><Keyword>AMSR-E-project</Keyword><Keyword>Aqua</Keyword><Keyword>BRIGHTNESS TEMPERATURES</Keyword><Keyword>DAAC</Keyword><Keyword>EOSDIS</Keyword><Keyword>EOS PM-1</Keyword><Keyword>Imagery</Keyword><Keyword>NASA</Keyword><Keyword>NSIDC</Keyword><Keyword>Passive Microwave Radiation</Keyword><Keyword>Polar Stereo Brightness Temps-project</Keyword><Keyword>Radiance</Keyword><Keyword>Remote Sensing</Keyword><Keyword>Tbs</Keyword><Sensor_Name><Short_Name>AMSR-E</Short_Name><Long_Name>Advanced Microwave Scanning Radiometer-EOS</Long_Name></Sensor_Name><Source_Name><Short_Name>Aqua</Short_Name><Long_Name>Earth Observing System, Aqua</Long_Name></Source_Name><Temporal_Coverage><Start_Date>2002-06-01</Start_Date><Stop_Date>2011-10-04</Stop_Date></Temporal_Coverage><Data_Set_Progress>deprecated</Data_Set_Progress><Spatial_Coverage><Southernmost_Latitude>-90</Southernmost_Latitude><Northernmost_Latitude>-39.23</Northernmost_Latitude><Westernmost_Longitude>-180</Westernmost_Longitude><Easternmost_Longitude>180</Easternmost_Longitude></Spatial_Coverage><Spatial_Coverage><Southernmost_Latitude>30.98</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>POLAR</Location_Type></Location><Data_Resolution><Latitude_Resolution>6.25 KM</Latitude_Resolution><Longitude_Resolution>6.25 KM</Longitude_Resolution><Vertical_Resolution>6.25 KM</Vertical_Resolution></Data_Resolution><Access_Constraints>These data have been retired and are no longer accessible. However, a more recent version may be available.</Access_Constraints><Use_Constraints>These data have been retired and are no longer accessible. However, a more recent version of may be available. Cite any prior or planned use of these data according to the recommended citation at&#xA0;https://nsidc.org/about/data-use-and-copyright. 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/MSFC/AMSR-E SIPS</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>HTTPS</Distribution_Media><Distribution_Size>46 MB</Distribution_Size><Distribution_Format>HDF-EOS2</Distribution_Format></Distribution><Reference/><Summary><Abstract>This Level-3 gridded product (AE_SI6) includes brightness temperatures at 89.0 GHz. Data are mapped to a polar stereographic grid at 6.25 km spatial resolution. This product is an intermediate product during processing of AMSR-E Level-3 sea ice products at 12.5 km and 25 km resolution.</Abstract></Summary><Related_URL><URL_Content_Type><Type>VIEW RELATED INFORMATION</Type></URL_Content_Type><URL>https://nsidc.org/sites/default/files/ae_si6-v003-userguide.pdf</URL><Description>AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids, Version 3 User Guide</Description></Related_URL><Related_URL><URL_Content_Type><Type>PROJECT HOME PAGE</Type></URL_Content_Type><URL>https://weather.msfc.nasa.gov/AMSR/</URL><Description>NASA AMSR-E web site</Description></Related_URL><Related_URL><URL_Content_Type><Type>PROJECT HOME PAGE</Type></URL_Content_Type><URL>https://nsidc.org/data/amsre/</URL><Description>AMSE-E web site at NSIDC</Description></Related_URL><Metadata_Name>CEOS IDN DIF</Metadata_Name><Metadata_Version>VERSION 9.9</Metadata_Version><DIF_Creation_Date>2014-07-01</DIF_Creation_Date><Last_DIF_Revision_Date>2026-03-24</Last_DIF_Revision_Date><Extended_Metadata><Metadata><Group>NSIDC</Group><Name>Version Summary</Name><Value>&lt;p&gt;Changes to the Version 3 algorithm for these data include:&lt;/p&gt;
&lt;ul&gt;
&lt;li&gt;Uses Version 3 of the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures data as input&lt;/li&gt;
&lt;li&gt;Improved Antarctic land mask: Includes an updated ice shelf definition created by the National Ice Center Science Department in June 2011, and an updated shoreline developed from ENVISAT and RADARSAT imagery from October 2009 to April 2010. Also, this updated version no longer uses the Level-2A land flag and only uses the updated land mask for surface type classification in the southern hemisphere sea ice concentration algorithm.&lt;/li&gt;
&lt;li&gt;Inclusion of ISO lineage metadata&lt;/li&gt;
&lt;/ul&gt;</Value></Metadata><Metadata><Group>NSIDC</Group><Name>Minor Version</Name><Value/></Metadata><Metadata><Group>NSIDC</Group><Name>Spatial Reference Systems</Name><Value><Spatial_Reference_System><SRID>EPSG:3411</SRID><Description>NSIDC Sea Ice Polar Stereographic North</Description></Spatial_Reference_System><Spatial_Reference_System><SRID>EPSG:3412</SRID><Description>NSIDC Sea Ice Polar Stereographic South</Description></Spatial_Reference_System></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>Cavalieri, D. J., Markus, T. &amp; Comiso, J. C. (2014). &lt;i&gt;AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids&lt;/i&gt;. (AE_SI6, Version 3). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. &lt;a href="https://doi.org/10.5067/AMSR-E/AE_SI6.003"&gt;https://doi.org/10.5067/AMSR-E/AE_SI6.003&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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