GRVEPO

                                                                                
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
GRVEPO                  890101000000.                                           
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
                                                                                
                                                                                
COLUMNS FORMAT         DESCRIPTION                         DEFAULT VALUE & UNITS
                                                                                
1-6     A6     GRVEPO - Sets the epoch time for the                             
               time dependent gravity option. See option                        
               GRVTIM for more details.                                         
                                                                                
                                                                                
25-44   D20.8  Epoch time in YYMMDDHHMMSS. for the time            0.           
               dependent gravity model. Linear rates and                        
               periodic terms in the time dependent gravity                     
               model will be calculated from this time.                         
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
NOTES: See option GRVTIM for the time dependent gravity formulation.            
                                                                                
                                                                                
                                                                                
UNITS:  KM =Kilometers; M  =Meters    ; S  =Seconds    ; M/S=Meters per second  
        MAS=Milliarc seconds                                                    
                                                                                
                                                                                
                                                                                
IF CARD OMITTED:  Epoch time for time dependent gravity will be zero.
APR 1997

9704.0

GLOBAL SET



Patrick Dahiroc
1998-09-10