Maximum observed frequency in HF backscatter ionogram and day variblelaw of slope distance.

高频返回散射电离图中最高观测频率、斜距的日变化规律；

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Maximum observed frequency in HF backscatter ionogram and day variblelaw of slope distance.

高频返回散射电离图中最高观测频率、斜距的日变化规律；

youdao