自1999年1月中華衛星一號發射升空至今已有4年的時間，而2000年開始利用RGT與TGT地面站接收資料至今也累積了超過3年的觀測資料，因此本論文針對衛星訊號鎖定狀態、微波輻射儀所量測之天空溫度及降雨量等進行長期的統計分析，結果發現3年來RGT的鎖定狀態約為69%，TGT則為62%，造成鎖定狀態不夠理想的主要原因除了大氣對訊號所造成的衰減之外，還有系統長期維護不易使得系統不穩定所造成。
雖然降雨對訊號接收有很大的影響，但是在總觀測時間中降雨所佔的時間比率非常的低，所以降雨對整體鎖定狀態的表現影響不大，若是將各個降雨的pass資料加以分析，則可以發現地面降雨對訊號造成嚴重的衰減。而我們也發現RGT與TGT的radiometer有漂移的問題，使得在利用其觀測值來做訊號衰減之預測時可能會有所誤差，且在降雨事件過後附著於天線盤面及獨立式微波輻射儀防水罩上之水膜亦會影響觀測資料。

The diagnosis and analysis of the Ka Band Propagation Experiments on ROCSAT-1.Since January ,1999,ROCSAT-1 launched successfully,we have observed from ROCSAT at two ground stations for more than 3 years.This paper presented some statistic results of RGT and TGT.From 2000 ~ 2003,the lock on percentage of RGT is about 69%,and the lock on percentage of TGT is about 62%.

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