【作者】 郑亲波； 张锷； 董德平；

【Author】 ZHENG Qinbo ZHANG E DONG Deping Shanghai Institute of Technical Physics, CAS, Shanghai,200083

【机构】 中国科学院上海技术物理研究所；

【摘要】 我国发射了4颗极轨气象卫星,其主载荷-扫描辐射计的红外探测通道信号,均存在不同程度的衰减。1988年发射的FY-1A卫星,红外通道开通时就衰减了70%,15天后失去使用价值;经分析认为,其主要原因是水汽凝结在低温下的红外探测器件光学窗口表面所致。1990年发射的FY-1B卫星,针对A星的衰减原因,采取了防水汽污染的措施后,初期的红外信号天衰减率约为1%。1999年和2002年发射的FY-1/C,D卫星,红外信号仍存在微量衰减现象,本文对此进行了初步分析,认为光学镜片受水汽污染仍是主要原因。更多还原

【Abstract】 China has launched 4 polar-orbit metrological satellites named FY-1. The main payloadis a Visible-Infrared Scanning Radiometers, but IR signal is degraded in different levels. FY-1A,which was launched in 1988, IR signal had been degraded 70% when the channels were on and wasun-useable after 15 days. We think that is caused by the vapor coagulated on the low temperaturewindow of IR Detectors. After using the methods of preventing vapor contamination, the IR signaldegraded rate of FY-1B, which was launched in 1990, was reduced to about 0.4% per day in theearly days. FY-1C and FY-1D, which were launched in 1999 and 2002, also have little degradation.On the basis of analyzed, it is still vapor contaminate the optical elements.更多还原