What the difference between GEO, LEO satellite ?

LOE: Low Earth satellites revolve on the lower orbit at less than2000km, satellites try to ensure a high elevation for every spot on the earth to provide a high quality communication link:

- transmission Rate2400 bit/s 

- smal foot print

- becouse of its highest polar region, is a better global coverage

- signal much stronger

- short time life5 -8 years 

GEO: Goestasionary satellite is in a circular orbit35,863km above the earth’s surface and rotates in the equatorial plane of the earth; it will therefore rotate at exactly the same angular speed as the earth and will remain above the same spot on the equator as the earth rotates. The orbit must have an inclination angle of0o:

- no duppler anomaly

- fixed Antenna to truck the space craft.

- lagre coverage at35863 Km

- large foot print

- high time life about15 years.

if you need more information with deep details, I request you to consult: <<Principles Of Communictions Satellites>> Gary D. Gordon & Walter L. Morgan

hopre this information can help you.

GEO stands for Geostationary-Earth-orbiting, while LEO stands for Low-Earth-orbiting.

Geostationary satellites have a geostationary orbit (GEO), which is 35,786 kilometers (22,236 mi) from Earth’s surface. This orbit has the special characteristic that the apparent position of the satellite in the sky when viewed by a ground observer does not change, the satellite appears to "stand still" in the sky. This is because the satellite's orbital period is the same as the rotation rate of the Earth. The advantage of this orbit is that ground antennas do not have to track the satellite across the sky; they can be fixed to point at the location in the sky the satellite appears.

A low Earth orbit (LEO) typically is a circular orbit about 160 to 2,000 kilometers (99 to 1,243 mi) above the earth's surfaceand, correspondingly, a period (time to revolve around the earth) of about 90 minutes.

Because of their low altitude, these satellites are only visible from within a radius of roughly 1,000 kilometers (620 mi) from the sub-satellite point. In addition, satellites in low earth orbit change their position relative to the ground position quickly. So even for local applications, a large number of satellites are needed if the mission requires uninterrupted connectivity.

Low-Earth-orbiting satellites are less expensive to launch into orbit than geostationary satellites and, due to proximity to the ground, do not require as high signal strength . Thus, there is a trade off between the number of satellites and their cost.

In addition, there are important differences in the onboard and ground equipment needed to support the two types of missions.