主动式遥感(Active remote sensing)亦称“有源遥感”,是指由遥感器向目标物发射一定频率的电磁辐射波,然后接收从目标物返回的辐射信息进行的遥感技术。它是通过分析回波的性质、特征及其变化来达到识别物体的目的的。主动式遥感所使用的遥感器有微波散射计、激光雷达、侧视雷达、合成孔径雷达等。
合成孔径雷达(SAR)作为主动式遥感器,是一种利用雷达本身发射的电磁波进行高分辨率成像的系统。
Synthetic Aperture Radar (SAR), as a kind of active remote sensor, is a system that can scan and image earth surface object in a high resolution using its EM wave.
在主动式红外遥感测量中,大气中痕量气体的红外吸收与不同红外波段的透过率光谱有关。
In active infrared remote sensing measurements, the infrared absorption caused by the presence of trace gases in atmosphere is related to the transmittance spectra in different infrared wave band.
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