HR: 16:15h
AN: H22H-02    [PDF]
TI: Generation of brightness temperatures using the direct broadcast data from AMSR-E onboard Aqua satellite
AU: * Kim, S
EM: sbkim@satrec.kaist.ac.kr
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Shin, J
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Im, Y
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Park, S
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Kim, M
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Park, S
AF: Satellite Technology Research Center, Korea Adv. Inst. Science Tech., 373-1 Gusung, Yusung, Daejeon, 305-701 Korea, Republic of
AU: Park, H
AF: Korea Meteorological Administration, 460-18 Shindaebang, Dongjack, Seoul, 156-720 Korea, Republic of
AU: Kim, K
EM: kkl@kma.go.kr
AF: Korea Meteorological Administration, 460-18 Shindaebang, Dongjack, Seoul, 156-720 Korea, Republic of
AB: The Advanced Microwave Scanning Radiometer for EOS (AMSR-E) is a six-frequency dual-polarized passive microwave radiometer onboard Aqua satellite and forms an integral part of water cycle monitoring by Aqua. Like other sensors on Aqua, AMSR-E data are direct-broadcasted to local users. In this work we have processed the direct-broadcast data received by the Korea Meteorological Administration (KMA), S. Korea. To our knowledge, this is the first attempt to utilize the AMSR-E direct-broadcast policy. We use the Level 1B data processor developed by Japans NASDA, distributed by U.S. NSIDC. NASDA­_s processor is configured to handle 50-minute granules. For processing direct broadcast data, which are about 10-minute long, we found that the modification to the NASDA­_s system is required. The modifications include correction to path/orbit numbers and the land mask selection. Special consideration is necessary during the radiometric calibration because the direct broadcast data appears lacking the cold sky mirror (CSM) count. Pixel-to-pixel comparison with NASDA­_s product indicates the difference in brightness temperature of about 0.2 K rms and less than 0.05 K mean. These differences are expected to come from the different length of data between NASDA­_s 50-minute granule and around 10-minute data received by KMA. Some important meta data are incorrect, such as the equatorial crossing time/longitude and slight change in imaging time. However these errors do not affect the geometric and radiometric calibration. Using the Level 1B data, we have retrieved sea surface temperature and soil moisture parameters, to utilize the merit of the AMSR-E­_s 6.9GHz channel over other sensors in the past. We expect our result would benefit other international users who are interested in AMSR-E direct-broadcast.
UR: http://satrec.kaist.ac.kr
DE: 1866 Soil moisture
DE: 1894 Instruments and techniques
DE: 4275 Remote sensing and electromagnetic processes (0689)
DE: 6969 Remote sensing
SC: Hydrology [H]
MN: 2003 Fall Meeting