here's an unvetted list as per 10/2010
approx 450
Geo-sync orbits are hard to maintain as the orbit decays almost immediately upon achieving it, lending to low service life span thus the list changes a lot
positions are usually chosen on the 1/10 of a degree of the planets circumference so 360 x 10 is the ideal maximum amount of sats in this orbit at one time.
there are slightly off orbits named super and sub geosynchronous which move slowly across the orbit either westerly or easterly, usually marked for junk satellites or discards, some electronic lab platforms have been put here however, the diameter of these orbits very and are often highly elliptical so pin pointing these related orbits and how many positions they offer is unlikely to be meaningful
Yes, the satellites orbit in a geosynchronous orbit, as with most all communications satellites. (Some exceptions are satellites such as the global positioning satellites.)
Geosynchronous Orbit
Geosynchronous orbit? or Low Earth Orbit?
GPS satellites orbit at 11,000 nautical miles above the Earth
All satellites follow an elliptical orbit - they are darn close to circular, but even a circle is an ellipse.
A Satellite movement behaves in two ways. Its orbit may be defined either as "geosynchronous" or "geostationary". Geosynchronous satellites move together with the Earth's own orbit, so it revolves in the same way as the earth is. Geostationary satellites remain statically in place for a certain coordinate...
A: Low Earth orbit, B: Medium Earth orbit, & D: Geosynchronous orbit.
Yes.It is called geosynchronous orbit where the satellite speed equals the rotation of earth but is far enough so gravity doesn't effect its orbit immediately.Weather satellites are geosynchronous as are communication, broadcast (DirecTv and Dish, to name a few), spy, scientific.http://www.spacetoday.org/Satellites/SatBytes/SatOrbits.html
There are two types of satellites that are located in a foxed spot over earth the first is reconnaissance satellites for observation of earth and usually used by the military.. The second is earth observation satellites and are intended for environmental monitoring
There are currently 32 GPS satellites Orbiting earth at 20,000Kms above sea level There are also 24 GLONASS satellites (The russian version of a GPS satellite) Which many high end GPS receivers will use in conjunction with the standard GPS satellites. These orbit a little lower than GPS at arond 19,000Kms above sea level. There are 4 Galileo Satellites, which are currently un used, but are the start of the European satellite constealltion which is a work in progress. They orbit at 24,000Kms above sea level. On top of all that, there are 10 Chinese navigation satellites called COMPASS orbiting in an orbit above China and Asia. They orbit at around 21,000 Kms above sea level.
A geosynchronous orbits refers to the orbit of a satellite that matches the rotation of the earth, allowing it to remain above the same line of longitude. The satellite may still move north and south but not east or west. A geostationary orbit is a specific type of geosynchronous orbit directly above the equator. This allows the satellite to remain completely stationary over a fixed point on the earth's surface.
Mostly Moons, although a man-made thing that orbit a planet is a satellite. The Goddard Space Flight Center's lists 2,271 satellites currently in orbit. Russia has the most satellites currently in orbit, with 1,324 satellites, followed by the U.S. with 658.