Useful data

Earth gravitational parameter
Earth mass
Earth gravitational constant
Earth equatorial radius	6378.14 km
Earth polar radius	6356.785 km
Earth eccentricity	0.08182
Velocity of light	299792.458 km/s (NBS 1972 value)
Average radius of geostationary orbit	42164.57 km
Velocity of geostationary satellite	3.074689 km/s
Angular velocity of geostationary satellites
Geostationary satellite orbital period	86164.09 s (23 hours, 56 minutes, 4.09 seconds)
Boltzmann constant
Maximum range of geostationary satellite (0 degree elevation)	41680 km
Minimum range of geostationary satellite (90 degree elevation)	35786 km
Half-angle subtended at the satellite by Earth	8.69 degrees
Coverage limit on Earth (0 degree elevation)	81.3 degrees
One nautical mile	1.852 km

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