DHDADX:
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Computes the derivatives of the dihedral angle with respect
to right ascension and declination
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Form:
H = DHDADX( ra, dec, us, ue )
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Inputs
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ra Right Ascension
dec Declination
us (3,n) Unit sun vectors
ue (3,n) Unit nadir vectors
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Outputs
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H (n,2) [da/ra da/dec]
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Children:
Common: Graphics/NewFig
Math: Linear/Cross
