Graveyard orbit
Here, the solar radiation pressure coefficient (generally between 1.2 and 1.5), is the ratio of the surface area and the mass of the satellite. This formula includes about 200 km in geosynchronous orbit protection area set so that the graveyard orbit does not interfere with the geostationary orbit and about 35 km mainly to deal with the effects of gravity from the sun and the moon. The rest of the equation considers solar radiation pressure, which depends on the physical parameters of the satellite. In the United States, all geostationary satellites launched on or after March 18, 2002 are required to move to graveyard orbit at the end of the operational life in order to receive the license of the satellite communication service from the Federal Communications Commission. Under the regulation of the US government it is necessary to raise the altitude by about 300 km. ...