AMSR/ADEOS-II L1A Raw Observation Counts V003

Version 003
  • Abstract
    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.
  • Version Description
    The improved Version 3 AMSR-L1A product features empirical corrections to the co-registration parameters A1 and A2, and an updated parameter file used for correcting the AMSR 89 GHz position information. As a result, Version 3 AMSR-L1A data provide improved accuracy for the following: latitude and longitude, land/ocean flags, earth incidence angle, earth azimuth angle, sun azimuth angle, and sun elevation angle.

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    Radiometric Counts

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    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.

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  • Spacecraft
    • AMSR

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    Coverage Type Zone Identifier Geometry Granule Representation
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  • JAXA

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  • National Snow and Ice Data Center

    1540 30th St Campus Box 449
    Boulder, Colorado 80309-0449

    9:00 A.M. to 5:00 P.M., U.S. Mountain Time, Monday through Friday, excluding U.S. holidays.
    • 303-492-6199
    • 303-492-2468
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  • JAXA Earth Observation Center

    1401 Mumanoue
    Hatoyama-machi, Hiki-gun 355-0302

    9:30 - 17:30 (Japanese Standard Time)
    • +81-492-98-1307
    • +81-492-98-1398
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    • Collection citation title not provided

      Japan Aerospace Exploration Agency (JAXA). 2014. AMSR/ADEOS-II L1A Raw Observation Counts. Version 3. [indicate subset used]. Boulder, Colorado USA: NASA National Snow and Ice Data Center Distributed Active Archive Center.

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