The quantity of the EM energy that reflected from the ground decided the quality of the satellite image of passive remote sensing.
地形决定了地面电磁波反射的强弱，反射的强弱又决定了被动遥感影像的质量。
Now a method is suggested which USES a passive remote sensing equipment-microwave radiometer for detection and identification of air object.
文中提出了微波辐射计去探测和识别空中目标的方法。
Microwave radiometer is the core equipment of passive microwave remote sensing and a powerful tool for ground objects radiation detection, imaging and characteristics recognition.
微波辐射计是无源微波遥感的核心设备，是进行地物背景微波辐射特性探测、成像和判断的主要工具。
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