Three subjects-UWB radar antenna, UHF/VHF band receiver noise temperature, and the target detection from background, which are main factors in UWB SAR range equation, are studied.

从超宽带雷达天线、UHF/VHF波段接收机噪声温度以及最小可检测的信噪比三个方面研究了超宽带合成孔径雷达方程。

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It means that we can diagnose subtle change of global atmosphere temperature by using Schumann resonance data recorded at any single station with low noise background.

这就是说，在全球任何一个背景噪声较低的地点设置一个舒曼共振台站，可由这一台站纪录的舒曼共振幅度的明显变化推断全球热带大气气温的细微变化。

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