[Forum] Does bad weather affect GPS signals?

This kind of worry is not unreasonable, but in fact, GPS signals will not be affected by thick clouds, fog, rain and snow, and the wavelength of GPS signals is enough to make them cross various obstacles in the air. In other words, the impact of bad weather on GPS signals will not be so great as to affect its normal work. But water can really block the spread of GPS signals. For example, underwater GPS can't receive a signal, and only by placing the receiving antenna of GPS very close to the water surface can we barely receive a signal. In addition, most clothes will not block the GPS signal, but those clothes with metal parts will weaken the GPS signal to some extent, and sometimes even completely block the signal. But remember, if your clothes are a little wet, the GPS in your pocket will also fail. In fact, the water directly attached to the surface of the GPS receiving antenna also has a great influence on the GPS receiving signal. I have experienced it myself. When the GPS antenna accidentally touches a thin layer of water, the signal becomes very weak and unstable, but with the rapid evaporation of water, the GPS signal immediately recovers its original strength.