Based on the original Rocket Workbench on SourceForge in CVS at:
https://sourceforge.net/projects/rocketworkbench
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550 B
550 B
WGS-84 modeling constants:
Semi-major axis
a = 6378137.0 m
Semi-minor axis
b = 6356732.3142 m = a/(1-f)
Flattening of ellipsoid
f = 1.0/298.2572235630
Eccentricity of ellipsoid
e = 0.081819191 = (2f-f^2)^0.5
2nd zonal harmonic coeff. of gravitational potential
C2,0 = - 484.16685 x 10^-6
Earth's gravitational const. (with mass of atmosphere)
GM = 0.3986004418 x 10^15 m3/s2
Earth's angular velocity at equator
omega = 7292115 x 10^-11 radians/sec
Centimeter accuracy correction to this model:
http://www.nima.mil/GandG/wgs-84/egm96.html