Which type of orbit (polar or geostationary) can satellites be put into as 'navigation beacons'?

Low -Earth orbits are obligatory for several reasons, the most important one being that the emitting power of the beacon goes up as the square of the distance. Geostationary orbits would require 40 times as big a power source, as a beacon in low-Earth orbit would need. |||Heck.. just about any type of orbit. The GPS system utilizes about 28 different, low-Earth orbits for their system. If you want a satellite to remain over one spot, turning with the Earth once per day, then you want a geostationary orbit. |||The polar orbits are better because it covers the same areas (signals not distorted) at different times of the year. The Geo gives a distorted view of the polar region because of the angle it is in.|||any orbit will do, at least in theory.





for maximum global coverage, satellites are in various sorts of inclined orbits, like gps and glonass, or polar orbits, like transit.||| Low orbit and spaced to cover the whole surface of the earth.