EPOCH

                                                                                
----+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8
EPOCH               830901              830901              830903              
----+----0----+----0----+----0----+----0----+----0----+----0----+----0----+----0
                                                                                
COLUMNS FORMAT         DESCRIPTION                         DEFAULT VALUE & UNITS
                                                                                
1-6     A6        EPOCH  - Specifies epoch time for                             
                  satellite elements ,optional start time                       
                  for orbit integration,and mandatory stop                      
                  time for the run. The stop time is used                       
                  by GEODYN to determine ephemeris and                          
                  flux data requirements.                                       
                                                                                
21-26   I6        Year, month and day of epoch (YYMMDD).         0              
                                                                                
27-30   I4        Hours and minutes of epoch (HHMM).             0              
                                                                                
31-40   D10.8     Seconds of epoch (SS.SSSSSSS).                 0.             
                                                                                
41-46   I6        YYMMDD of start. : Default is epoch time.    cols. 21-26      
                                   : If specified as other                      
47-50   I4        HHMM of start.   : than epoch, orbit will    cols. 27-30      
                                   : be integrated to this                      
51-60   D10.8     Seconds of start.: time and epoch reset      cols. 31-40      
                                   : to this time before any                    
                                   : measurement processing.                    
                                                                                
61-66   I6        YYMMDD of stop.  :  A STOP TIME IS             0              
                                   :                                            
67-70   I4        HHMM of stop.    :    MANDATORY                0              
                                   :                                            
71-80   D10.8     Seconds of stop. :  FOR ALL ARCS               0.             
                                                                                
                                                                                
NOTE: All times specified on the ORBTVU and the ORBFIL  card  must fall         
between the start time and the stop time specified on the EPOCH card.
SEPT 1985

8507.0

ARC SET - MANDATORY CARDS



Patrick Dahiroc
1998-09-10