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微波成像辐射计用于大气微波遥感、海洋微波遥感和陆地微波遥感;是气象、海洋和灾害监测的重要遥感手段之一。微波成像辐射计在轨运行时能否获取有价值的探测资料,得到定量化的应用和真正的业务使用,主要取决于微波成像仪能否进行精确定标。本文主要介绍了星载微波成像辐射计目前国际上通常采用的两种定标方法,馈源口面定标方法和天线口面定标方法,并对这两种方法进行了比较和研究。
Microwave imaging radiometer is used for atmospheric microwave remote sensing, ocean microwave remote sensing and terrestrial microwave remote sensing; it is one of the important remote sensing means for meteorological, oceanographic and disaster monitoring. Whether the microwave imaging radiometer can obtain valuable exploration data during orbit operation and get quantified application and real business use mainly depend on whether the microwave imager can accurately calibrate. This article mainly introduces two kinds of calibration methods commonly used in spaceborne microwave imaging radiometers. The calibration method of feed surface and the method of antenna surface calibration are compared. The two methods are compared and studied.