Proceedings of the KSRS Conference (대한원격탐사학회:학술대회논문집)

  • Volume 1
  • /
  • Pages.398-401
  • /
  • 2006
  • /
  • 1226-9743(pISSN)
Korean Society of Remote Sensing (대한원격탐사학회)
권호 표지

CALIBRATION ISSUES OF SPACEBORNE MICROWAVE RADIOMETER DREAM ON STSAT-2

  • Singh, Manoj Kumar (Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
  • Kim, Sung-Hyun (Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
  • Chae, Chun-Sik (Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
  • Lee, Ho-Jin (Department of Mechatronics, Gwangju Institute of Science and Technology (GIST)) ;
  • Park, Jong-Oh (Korea Aerospace Research Institute (KARI)) ;
  • Sim, Eun-Sup (Korea Aerospace Research Institute (KARI)) ;
  • Zhang, De-Hai (Center for Space Science Applied Research (CSSAR)) ;
  • Jiang, Jing-Shan (Center for Space Science Applied Research (CSSAR)) ;
  • Kim, Yong-Hoon (Department of Mechatronics, Gwangju Institute of Science and Technology (GIST))
  • Published : 2006.11.02
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Abstract

Dual channel Radiometer for Earth and Atmospheric Monitoring (DREAM) is the main payload on Science and Technology SATellite-2 (STSAT-2) of Korea. DREAM is two-channel microwave radiometer with linear polarization, and operating at center frequencies of 23.8 GHz and 37 GHz. An equation for DREAM calibration is derived which accounts for losses and re-radiation in the microwave components of the radiometer due to physical temperature. This paper describes the radiometric calibration equation to get antenna temperature ($T_A$) from the measured output data. At lower altitude, the measured deep space temperature is contaminated by middle atmosphere and earth radiation. In this paper, we presented the detail mathematical formulation to find the altitude up to which cold source brightness temperature is not affected by earth and middle atmosphere radiation. The DREAMPFM data is used to calculate the performance parameters (linearity, sensitivity, dynamic range, and etc.) of the system.

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