GPS jammer shields satellites
There are two main methods for gps jammer to jam satellites. The first is for the uplink, and the transmission is from the ground to the satellite. This can be done by generating an interfering signal at the same specific frequency and aiming it at the satellite, so the satellite cannot distinguish between actual communication and noise. The second option is to disrupt the downlink, which is the transmission from the satellite to the ground forces. According to the same principle, the GPS jammer will generate noise of the target frequency, but in this case, the jamming unit will not aim the signal at the satellite, but will send out a signal covering the ground area, where the ground force will wait to receive communication .
The transmission power required to "obfuscate" the satellite is very high, but once achieved, it will effectively block the satellite for all ground communications. The power required to interfere with the downlink is much less, but its impact is limited on the receiving terminal antennas that are far away and line of sight to the interferer. The size and transmission power will determine the interference range (the downlink GPS jammer can be minimized to the size of a handheld jammer). The basic jamming capability is very simple and does not require complicated processing (so that the military will often accidentally interfere with its own satellite communications). However, advanced satellite jammers can disrupt specific frequencies and frequency bands (for example, based on the satellites they will interfere with), and allow operators to pre-select frequencies or operate GPS jammers in a dynamic mode to interfere with satellite interference. The communication range is wider.