What does GEO stand for?

What does GEO stand for?

• A. Global Earth Orbit
• B. Geosynchronous Earth Orbit
• C. Geostationary Earth Orbit
• D. Geodetic Earth Orbit

Answer: (C)

Geostationary Earth Orbit is an orbit with a period that matches Earth's rotation, so a satellite appears fixed above the same point on the equator. This means it stays over the same longitude 24 hours later, which comes from the orbital period being about one sidereal day (roughly 23 hours and 56 minutes) and an orbital altitude of about 35,786 kilometers above the equator. Because of this fixed position, ground antennas can point at a constant spot in the sky, making GEO ideal for communications and weather satellites. Geostationary is the specific stationary case people refer to with GEO. All geostationary orbits are geosynchronous, but not all geosynchronous orbits are geostationary—if the orbit is inclined, the satellite appears to move in a figure-eight pattern relative to a ground observer. The other terms listed aren’t standard orbital designations: “Global Earth Orbit” isn’t used in this context, and “Geodetic Earth Orbit” isn’t a recognized term.

Geostationary Earth Orbit is an orbit with a period that matches Earth's rotation, so a satellite appears fixed above the same point on the equator. This means it stays over the same longitude 24 hours later, which comes from the orbital period being about one sidereal day (roughly 23 hours and 56 minutes) and an orbital altitude of about 35,786 kilometers above the equator. Because of this fixed position, ground antennas can point at a constant spot in the sky, making GEO ideal for communications and weather satellites.

Geostationary is the specific stationary case people refer to with GEO. All geostationary orbits are geosynchronous, but not all geosynchronous orbits are geostationary—if the orbit is inclined, the satellite appears to move in a figure-eight pattern relative to a ground observer. The other terms listed aren’t standard orbital designations: “Global Earth Orbit” isn’t used in this context, and “Geodetic Earth Orbit” isn’t a recognized term.