Is the satellite receiver (pot) unable to receive the signal when it catches up with rainy weather?

This is called rain decay, which is a feature of ku antenna. You received Zhongxing 9, and the antenna is a flat antenna.

The solution is to increase the antenna diameter.

Selection of zhongxing 9 antenna

I suggest you buy a parabolic antenna. 35cm is fine. Plane antenna has a fatal disadvantage, that is, the polarization mode cannot be changed. Once the satellite has a right-handed program flat antenna, it is unacceptable. Another disadvantage is that once the tuner breaks down, the whole antenna will be scrapped. Another disadvantage is that the receiving margin is too small, and it will not be able to receive normally in rainy and snowy weather. Zhongwei 35cm parabolic antenna is generally around 50-60 yuan. The current receivers are almost the same, and the price is generally around 150 yuan. From a long-term point of view, I suggest you buy an antenna over 45CM, so that once you don't want to see Zhongxing-9, or there are other satellites you want to receive in the future, you can continue to use it without repeated investment.