2026-08-09T15:21:54Zhttp://nsidc.org/api/dataset/metadata/oaioai:nsidc.org/AMSR-L1A.0022026-02-04T16:17:19Zcumulusretirednasa_nsidc_daac
AMSR-L1A.002AMSR/ADEOS-II L1A Raw Observation CountsJapan Aerospace Exploration Agency (JAXA)AMSR/ADEOS-II L1A Raw Observation Counts2007-08-03Boulder, Colorado USANASA NSIDC DAAC: NASA National Snow and Ice Data Center Distributed Active Archive Center2false10.5067/ADEOS-II/AMSR/AMSR-L1A.002https://nsidc.org/sites/nsidc.org/files/files/data/older-version-user-guides/amsre/amsr_l1a_v2.pdfAMSR-L1ATechnical ContactNSIDCUser Servicesnsidc@nsidc.org1-303-492-61991-303-492-2468CIRES, 449 UCBUniversity of ColoradoBoulderCO80309-0449USAInvestigator1-8-10, Harumi Chuo-kuTokyo104-6023JapanEARTH SCIENCESpectral/EngineeringMicrowaveSensor Counts SENSOR COUNTSClimatology/Meteorology/AtmosphereADEOS-IIAMSRAMSR-L1ADAACEOSDISEOS PM-1JAXANASANSIDCPassive MicrowaveRadianceRADIOMETERRadiometric CountsRaw DataRaw Observation CountsRaw Sensor CountsRemote SensingAMSRAdvanced Microwave Scanning RadiometerADEOS-IIAdvanced Earth Observing Satellite-II2003-01-182003-10-24deprecated-9090-180180Geographic RegionGlobal50 minuteNo information available for this section.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.EnglishJP/JAXA/EOCNASA 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 ColoradoBoulderCO80309-0449USAFTP38 MBHDF-EOS2Earth Observation Research and Application Center (EORC). 2003. ADEOS-II:Midori-II Science Project. http://sharaku.eorc.jaxa.jp/ADEOS2/index.html. Accessed March 2004.
Japan Aerospace Exploration Agency (JAXA). 2003. AMSR Overview. http://www.eorc.jaxa.jp/en/index.html. Accessed March 2004.
Japan Aerospace Exploration Agency (JAXA). 2003. ADEOS-II Data Users Handbook. Tokyo, Japan: JAXA. View PDF file.
National Space Development Agency of Japan. Date unknown. ADEOS-II Reference Handbook. View PDF file.
For more information regarding related publications, go to the Research Using AMSR Data Web page.The Advanced Microwave Scanning Radiometer (AMSR) instrument on the Japan Aerospace Exploration Agency's (JAXA) Advanced Earth Observing Satellite-II (ADEOS-II) provided global passive microwave measurements of land, ocean, and atmospheric variables for the investigation of global water and energy cycles. The AMSR/ADEOS-II L1A Raw Observation Counts (AMSR-L1A) data set was processed from Level 0 science packet data by the JAXA Earth Observation Center (EOC) in Japan. Each half-orbit data granule consists of observation counts, antenna temperature coefficients, offsets for calculating antenna temperatures, calibration temperature counts, land/ocean flags, time, latitude, longitude, and navigation fields in Hierarchical Data Format (HDF).
AMSR is a conical scan sensor that sweeps the surface of the Earth at about ±90 degrees centered at the direction of the satellite flight. The swath width is about 1600 km. It measures horizontally and vertically polarized radiance at 6.9, 10.65, 18.7, 23.8, 36.5, and 89.0 GHz; and vertically polarized radiance at 50.3 and 52.8 GHz. AMSR collected 290 data points per scan for the 6 GHz to 36 GHz channels and 580 data points per scan for the 89 GHz channel. Data are available via FTP.VIEW RELATED INFORMATIONhttps://nsidc.org/sites/nsidc.org/files/files/data/older-version-user-guides/amsre/amsr_l1a_v2.pdfPROJECT HOME PAGEhttp://nsidc.org/data/amsr/AMSR/ADEOS-II DataPROJECT HOME PAGEhttp://nsidc.org/data/amsre/Aqua/AMSR-E DataCEOS IDN DIFVERSION 9.92007-08-032026-02-04NSIDCVersion SummaryThis improved algorithm features empirical corrections to the ADEOS-II scan azimuth and satellite flight direction. With corrected sun azimuth, sun elevation, earth azimuth, and earth incidence angles, the geometric accuracy of AMSR 89 GHz data improved to within 2 km, compared to Version 1 AMSR-L1A data.NSIDCMinor VersionNSIDCLevel of ServiceNo Data AccessNSIDCFull Dataset CitationJapan Aerospace Exploration Agency (JAXA). (2007). <i>AMSR/ADEOS-II L1A Raw Observation Counts</i>. (AMSR-L1A, Version 2). [Data Set]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. <a href="https://doi.org/10.5067/ADEOS-II/AMSR/AMSR-L1A.002">https://doi.org/10.5067/ADEOS-II/AMSR/AMSR-L1A.002</a>. [<i><describe subset used if applicable></i>].NSIDCRetiredtrue