Path: SC/Ephem
% Determine jD for when the earth-fixed frame is aligned with the ECI frame.
The input JD gives the day of interest.
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Form:
jD0 = EarthRotationZero( jD, eOfECalc )
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Inputs
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jD (1,1 Julian date
eOfECalc (1,1 Calculate the equation of the equinoxes
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Outputs
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jD0 (1,1 Julian date at which theta is zero
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References: Seidelmann, P. K., Explanatory Supplement to the
Astronomical Almanac, University Science Books, 1992, p. 20.
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SC: Ephem/EOfE SC: Ephem/GASTime SC: Ephem/GMSTime SC: Ephem/MSidDay SC: Ephem/NutDelta SC: Ephem/ObOfE Common: Time/DTSToDTA Common: Time/Date2JD Common: Time/JD2000 Common: Time/JD2T Common: Time/JDToMidnight Math: MathUtils/R2P5 Math: Trigonometry/CosD Math: Trigonometry/SinD
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