Why don't navigation systems have to face the southern sky?

Since satellite dishes have to face the southern sky, and they both use the same satellites, why don't navaigations systems also have to face the southern skies?|||Navigation satellites are not in geosynchronous orbit but in lower altitude inclined orbits. The receiver needs several satellites to be visible in different directions in order to triangulate your position.|||Hi. Most navigation satellites are equatorial based. Some are not, such as the "Iridium" telecommunication system. http://en.wikipedia.org/wiki/Iridium_(sa鈥?/a> So those antennas in the northern hemisphere DO tend to face south (towards the equator).|||The GPS satellites are not the same as the communications satellites in geosynchronous orbit. GPS satellites are in lower orbits, and their gerater signal strength means that a directional dish antenna isn't needed.|||You have confused geostationary communication satellites, which are in a ring above earth's equator, with GPS satellites, which are in various orbits, not geostationary, and with various inclinations (tilts).|||Most communications satellites are in Geosynchronous orbit, which is directly over the equator. If you were south of the equator, the antennas point north. At the Equator, they point straight up. The angle of the dish is equal to the latitude you are at on the earth.


http://science.nasa.gov/realtime/rocket_鈥?/a>


The longitude determines how much they point to the left or right of vertical to where the satellite is in the sky.





'GPS' positioning systems work by picking up signals from at least two satellites of the many overhead. Which can be at any angle.


http://www.nasm.si.edu/exhibitions/gps/w鈥?/a>|||Wrong. Satellite dishes face the equatorial sky.