ECIToEF:

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   Computes the matrix from mean of Aries 2000 to the earth fixed frame.
   Accounts for Earth rotation, nutation, and precession.
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   Form:
   c = ECIToEF( T )	
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   Inputs
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   T                 Julian century

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   Outputs
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   c		          Matrix from Mean of 2000.0 to planet fixed

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   References:   Seidelmann, The Explanatory Supplement to the Astronomical
                 Almanac, p. 705.
                 Montenbruck, O., Pfleger, T., "Astronomy on the Personal
                 Computer, Second Edition."
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Children:

Common: Time/Date2JD
Common: Time/JD2T
Common: Time/T2JD