Concept information
Preferred term
AMSR
Definition
- The Advanced Microwave Scanning Radiometer ( AMSR )is one of the Japan Aerospace Exploration Agency (JAXA) mission instruments on board ADEOS-II which was launched by H-IIA rocket on December 14, 2002. A similiar instument (AMSR-E) was flown on NASA's Aqua spacecraft to be launched May 4, 2002. The ADEOS-II spacecraft failed on October 24, 2003. The AMSR is a 14-channel, 8- frequency passive microwave radiometer which measures microwave radiation from the Earth's surface and atmosphere. Frequencies of the AMSR are 6.9, 10.7, 18.7, 23.8, 36.5, and 89.0 (horizontal and vertical polarization), and 50.3 and 52.8 GHz (vertical polarization only). AMSR has a large antenna (2 meters, one of the largest), and a field of view of 7 km at 89 GHz and 60km at 6.9 GHz. It scans conically at an incidence angle of 55 degrees to achieve a 1600 km swath width. Data are externally calibrated by a cold sky temperature (2.7K) and a high-temperature hot load. Various geophysical parameters will be retrieved from AMSR data. These parameters are primarily concerned with water (H2O), and include total water vapor content,total liquid water content, precipitation, snow water equivalent, soil moisture, sea surface temperature (SST), sea surface wind speed, and sea ice extent. The data set obtained by AMSR will support studies to understand the water and energy cycle on a global scale. AMSR features are summarized below. 1. The 2m-diameter antenna can measure SST and soil moisture at 6 and 10 GHz. 2. With its higher spatial resolution, retrieval accuracy will be improved for geophysical parameters such as total water vapor content, total liquid water content, and precipitation. 3. AMSR data will be transmitted to the EOC via a data relay satellite every orbit, so they can be used by meteorological agencies as initial conditions for weather forecast models. 4. GLI and SeaWinds data are available, and a combined use of AMSR, GLI and SeaWinds data will improve retrieval accuracy. Additional information available at "http://sharaku.eorc.jaxa.jp/AMSR/ov_amsr/index.htm" (en)
Broader concept
URI
https://gcmd.earthdata.nasa.gov/kms/concept/cf664bfd-5313-4472-9979-53b7e810287c
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