PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
^TEXT                = "POSITION.TXT"                                         
DATA_SET_ID = { "EAR-C-CCD-3-RDR-GRIGG-SKJELL-V1.0"    ,                      
                "GIO-C-DID-3-RDR-GRIGG-SKJELL-V1.0"    ,                      
                "GIO-C-EPA-3-RDR-GRIGG-SKJELL-V1.0"    ,                      
                "GIO-C-GRE-3-RDR-GRIGG-SKJELL-V1.0"    ,                      
                "GIO-C-IMS-3-RDR-HIS-GRIGG-SKJELL-V1.0",                      
                "GIO-C-JPA-3-RDR-IIS-GRIGG-SKJELL-V1.0",                      
                "GIO-C-JPA/MAG-4-RDR-GRIGG-SKJELL-V1.0",                      
                "GIO-C-MAG-4-RDR-GRIGG-SKJELL-V1.0"    ,                      
                "GIO-C-OPE-3-RDR-GRIGG-SKJELL-V1.0"                           
              }                                                               
PRODUCT_ID           = "EPHEMERIS-POSITION-199512"                            
PRODUCT_CREATION_TIME = 1995-12                                               
PRODUCT_NAME         = "POSITION DATA RECORD FILE, GIOTTO"                    
                                                                              
OBJECT               = TEXT                                                   
   PUBLICATION_DATE     = 1994-12-31                                          
   NOTE                 = "                                                   
       This position file is derived from Appendix A1 in EPGIOTTO.TXT         
"                                                                             
   DESCRIPTION          = "                                                   
   POSITION consists of two types of file records, the Control Record, which  
   occurs only at the top of the file, and the Position Data Records, which   
   follow the Control Record and contain the ephemeris data.                  
                                                                              
   The Control Record.                                                        
                                                                              
The logical Control Record consists of two physical records                   
each totaling 80 characters per line as shown below by :----                  
                                                                              
Variable        Format        Description                                     
--------------------------------------------------------                      
IY              I5            Year in which the tape was generated.           
MO              I5            Ditto for month.                                
DA              D16.10        Ditto for day.                                  
NS              I5            Size of Position Record in characters.          
NR              I5            Number of logical Position Records.             
---------------------------------------------------------                     
ET1             D16.10        Earliest Epoch - MJD ( E.T )                    
ET2             D16.10        Latest Epoch - MJD ( E.T )                      
SUTC            D16.10        MJD ( E.T ) at which UTC jumps.                 
ETUTC1          D16.10        E.T - UTC before SUTC.                          
ETUTC2          D16.10        E.T - UTC after SUTC.                           
-----------------------------------------------------------                   
                                                                              
  The Position Data Record.                                                   
The logical Position Data Record consists of three physical                   
records each totaling 80 characters.                                          
Each logical Position Record is shown below by :---                           
                                                                              
Variable        Format        Description                                     
------------------------------------------------------------------------      
ET               D16.10       Epoch = MJD ( E.T )                             
PG(1)            D16.10       Component of position vector of Giotto at ET.   
PG(2)            D16.10       Component of position vector of Giotto at ET.   
PG(3)            D16.10       Component of position vector of Giotto at ET.   
PH(1)            D16.10       Component of position vector of P/Grigg-        
                              Skjellerup at ET.                               
------------------------------------------------------------------------      
PH(2)            D16.10       Component of position vector of P/Grigg-        
                              Skjellerup at ET.                               
PH(3)            D16.10       Component of position vector of P/Grigg-        
                              Skjellerup at ET.                               
PE(1)            D16.10       Component of position vector of the Earth at ET.
PE(2)            D16.10       Component of position vector of the Earth at ET.
PE(3)            D16.10       Component of position vector of the Earth at ET.
------------------------------------------------------------------------      
PS(1)            D16.10       Component of position vector of the Sun at ET.  
PS(2)            D16.10       Component of position vector of the Sun at ET.  
PS(3)            D16.10       Component of position vector of the Sun at ET.  
------------------------------------------------------------------------      
Reference frame:  M.E.S of 1950.                                              
                  Origin = solar system barycenter.                           
                  Position units: km                                          
                  Time units: days                                            
"                                                                             
END_OBJECT = TEXT                                                             
END