Path: SC/Environs
% Computes the normalized sun intensity for an earth geosynchronous orbit.
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Form:
[n, eclipseType] = GeoEclps( alpha, beta, dEarth )
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Inputs
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alpha (1,1) Angle in the orbit plane between the sun and
the spacecraft ( 0 to 2 pi radians )
beta (1,1) Angle between the sun vector and the orbit
plane ( -0.409 < beta < 0.409 radians for
zero inclination )
dEarth (1,1) Distance to the earth. If not entered assumes 42167 km
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Outputs
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n (1,1) Normalized sun intensity ( 0 < n < 1 )
eclipseType (1,1) 0 = none, 1 = partial, 2 = annular, 3 = total
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