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