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利用地球冷目标观测亮温的稳定性和遥感数据统计直方图方法,是评价微波成像仪等类似微波成像辐射计在轨性能稳定性的有效方法.在此基础上,本文用2011 年2月—7月风云三号02 星微波成像仪在轨观测的亮温数据,对微波成像仪在轨运行的性能稳定性进行了分析.结果表明:风云三号02 星微波成像仪在轨性能稳定,所有通道最低亮温参考值波动范围不超过1.8 K.
It is available to analyze on-orbit performance stability of MWRI by statistic histogram data of earth cold targets with stable brightness temperature. This paper analyzed on-orbit performance stability of MWRI by adopting the brightness temperature data onboard FY-3(02) satellite during February and July in 2011, showing that the MWRI onboard FY-3(02) meteorology satellite performs stable on-orbit, and the max fl uctuation of the coldest reference values of all the 10 channels are less than 1.8 K.