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4 August 2009 Flight performance of the radiant cooler for IRAS on FengYun-3 Meteorological Satellite
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Infrared Atmospheric Sounder(IRAS) on FengYun-3 meteorological satellite measures scene radiance in the infrared spectrum and is used for sounding atmospheric parameters such as temperature and vapor vertical profiles. MWIR and LWIR detectors of IRAS need to work at 100K and are cooled by passive radiant cooler. To achieve temperature below 100K, multistage radiators are required. After the satellite was lunched in May 2008, the decontamination heaters of IRAS cooler were turned on and the cooler was heated at about 300K. After anti-contamination cover was deployed, the second stage radiator was heated for several days. When all heaters were turned off, the radiant cooler began to cool down and reached its lowest temperature about 3 days. The uncontrolled temperature of second stage and first stage are 85.3K and 136.3K. The cooling capacity of IRAS cooler is approximately 70mw at 100K controlled temperature. Degradation of IR channel signals is not observed. The flight performance and ground test results of the cooler are presented.
© (2009) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Deping Dong, Xiaofeng Yang, Hongyan Xu, and Yuezhong Zhao "Flight performance of the radiant cooler for IRAS on FengYun-3 Meteorological Satellite", Proc. SPIE 7383, International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Infrared Imaging and Applications, 738305 (4 August 2009);

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