Satellites cannot orbit the US; they orbit the Earth, and there are several thousand of them.
At present there are around 24-32 satellites orbiting in medium earth orbit(11,000 miles)more the satellites more accurate navigation is produced.
there is no satellites orbiting Saturn
That depends on the purpose of the satellite. Many are in "low Earth orbit", between 120 and 200 miles up. Communications satellites are generally in "geo-synchronous" orbits 23,000 miles high, and GPS satellites are in 12,000 mile orbits. And many altitudes in between.
2
With large number of low-earth-orbit satellites and the geo-synchronous orbit stuffed full of communications satellites, there aren't all THAT many "medium" altitude satellites. But there are some. The GPS navigation satellites, for example, are in highly inclined 12-hour orbits, and an unknown number of military "spy" satellites are in that middle range.
10
yes
2
Thousands, but the actual number is classified and varies from week to week as satellites de-orbit and new ones are launched.
It uses 66 small satellites in low earth orbit
There are currently 30 healthy GPS satellites in orbit.