Primarily photo or radar reconnaissance.
The orbit of a satellite is determined based on the functions that the satellite needs to perform. A communications satellite.s purpose is to make communications easier. If it were in a very low orbit, the satellite would pass quickly overhead and you would only have a couple of moments to talk. A photo satellite needs to have a low orbit, to be close enough to take good pictures. Photo satellites are often in polar orbits to allow them to cover the entire globe rather than the same parts over and over again.
A polar orbit (as opposed to an equatorial orbit) passes over the poles, north and south. A low orbit is relatively close to the Earth (or other object being orbited), it might be a few hundred miles up.
YES As height increases, speed of satellite decreases.
The cost varies depending on the size of the satellite, which determines which launch vehicle (rocket) can be used, the orbit the satellite is to put into (polar, low Earth orbit, geosynchronous, etc.) Costs start at about $50 million which does not include the cost of developing and building the satellite.
low-orbit (satellite)
It will be able to record information to be more reliable and will be able to record results accurately at that time of day.
The altitude of the satellite is critical depending on the purpose of the satellite. Low-Earth Orbit (LEO) satellites are fairly close to the Earth, and is good for photographic reconnaissance; it's a lot easier to get a good photo from 140 miles up as opposed to 23,000 miles up. The LEO satellite passes quickly over the surface, and isn't visible above the horizon for more than a few minutes per orbit, so LEO satellites work poorly for communications purposes. Geo-synchronous Earth Orbit (GEO) satellites orbit the Earth at an altitude of about 23,000 miles, and orbit the Earth in 24 hours - meaning, they orbit the Earth in the same time that it takes for the Earth to spin once. So a GEO satellite that's over the equator will appear to be in a fixed position in the sky, and doesn't appear to move. These are excellent for ground communications and relay purposes, because the ground antenna doesn't need to move; it's always pointed at the satellite. Polar orbit satellites will pass over every point on the Earth; the satellite is going around the world while the Earth spins beneath it.
It uses 66 small satellites in low earth orbit
Low Earth Orbit
A: Low Earth orbit, B: Medium Earth orbit, & D: Geosynchronous orbit.
If the satellite is in low orbit, it should take about one and a half hour to go once around the Earth.If the satellite is in low orbit, it should take about one and a half hour to go once around the Earth.If the satellite is in low orbit, it should take about one and a half hour to go once around the Earth.If the satellite is in low orbit, it should take about one and a half hour to go once around the Earth.
About an hour.