earth-observation satellite是什么意思 earth-observation satellite怎么读
earth-observation satellite的相关资料
earth-observation satellite的用法和样例
- This is found by observing the doppler shift in the frequency of the radio signals broadcast from the satellite.
这是通过观测卫星所发射的无线电信号频率中多普勒偏移来确定的。
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