EPHEM2

DEC 1999

9912.0

GLOBAL SET

                                                                                
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EPHEM2                                                                          
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COLUMNS FORMAT         DESCRIPTION                         DEFAULT VALUE & UNITS
                                                                                
1-6     A6     EPHEM2 - Introduces a supplementary
               planetary ephemeris for use in GEODYN
               to determine celestial body positions.
               The supplemenatry planetary ephemeris
               might include data from one or more
               celestial bodies.  
               Anyone of the bodies can be used as
               the center of integration or just for
               force modeling purposes. [1]
                                                                                
7       I1     Number of celestial bodies in the 
               supplementary planetary ephemeris.
                                                                                
8       I1     Sequence of the celestial body that
               will be used as center of integration.
               If this field is zero none of the 
               celestial bodies in the supplementary
               ephemeris will be the center of integration.

      
Note [1]: Use the global option SCBODY for the additional celestial bodies, physical parameter estimation and gravity field specification. IF CARD OMITTED: GEODYN will not use a supplementary ephemeris.



Shelley Rowton
1999-11-30