Low Earth Orbit (LEO)
* Altitude: 160-2,000 kilometers (100-1,243 miles)
* Examples: International Space Station, many Earth observation satellites, some communication satellites
* Characteristics:
* Relatively short orbital periods (90 minutes to 2 hours)
* Lower latency for communication
* Easier to reach with spacecraft, making maintenance and upgrades easier
* More atmospheric drag, requiring frequent orbital adjustments
Medium Earth Orbit (MEO)
* Altitude: 2,000-35,786 kilometers (1,243-22,236 miles)
* Examples: GPS satellites, Galileo satellites, some communication satellites
* Characteristics:
* Longer orbital periods (12 hours or more)
* Good for navigation and timing purposes
* Less atmospheric drag than LEO
Geostationary Earth Orbit (GEO)
* Altitude: 35,786 kilometers (22,236 miles)
* Examples: Many communication satellites, weather satellites
* Characteristics:
* Orbital period matches Earth's rotation (24 hours)
* Appears stationary from Earth's surface
* Excellent for broadcasting and communication
High Earth Orbit (HEO)
* Altitude: Above 35,786 kilometers (22,236 miles)
* Examples: Some scientific satellites, some communication satellites
* Characteristics:
* Very long orbital periods (days or weeks)
* Very low atmospheric drag
* Used for long-distance communication and scientific research
Other Considerations:
* Inclination: The angle of a satellite's orbit relative to the equator.
* Eccentricity: The shape of the orbit, ranging from perfectly circular to highly elliptical.
The specific altitude of a satellite is determined by its mission requirements and the technology used.