Path: Orbit/OrbitCoord
% Computes the semimajor axis given position and velocity magnitudes.
The default central body is the Earth.
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Form:
a = RV2A( r, v, mu )
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Inputs
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r (1,:) Position magnitude
v (1,:) Velocity magnitude
mu (1,1) Gravitational parameter (default is Earth)
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Outputs
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a (1,:) Semimajor axis
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