Hi there and welcome.
I do worry that your forum name is likely to confuse people though - maybe you should change it with prefix, such as Bob-The-Mini5Pro, lol...
Some gps devices aquire ephemeris files giving information on positions of satellites. I’m not going to try to explain it, but yes, the orbits and positions of the gps satellites can be predicted.
But, the drone altitude is calculated by the...
There is nothing you can do about it. If you put a GPS equipped device on the ground you can track its' travels as it sits stationary. The vertical accuracy is much worse than the horizontal. Some of the enterprise drones can work with...
It is possible. How depends on the controller you are using. RC2-Nx would be on the phone/tablet. RC2 needs Assistant 2 for consumer drones on a PC/Mac