n7axw wrote:Probably. I admit to ignorance as to how stationery orbits are maintained. As for your other comment, at the moment I wonder if the OBS is reacting to anything at all except direct threat to itself. If the theshhold is violation of the proscriptions, it should have reacted to steam.
Don
You are probably thinking of geosynchronous orbits, sometimes called geostationary orbits. An object in such an orbit is stationary with respect to the planet, which means they stay above the same part of the planet all the time. In other words, a geosynchronous satellite around the Earth orbits in 24 hours, the same rate that the Earth rotates.
A geosynchronous satellite is the only orbit which does not let the planet surface go by underneath it. Orbits closer than geosynchronous orbit faster than the rotation, and orbits further than geosynchronous orbit slower than the rotation.