Galileo Trajectory Pre-Jupiter Bundle                                     
    Galileo Trajectory Pre-Jupiter Earth1 Data Description                    
                                                                              
    PDS3 DATA_SET_ID               = GO-E-POS-6-EARTH1-FLYBY-TRAJ-V1.0        
    PDS3 DATA_SET_NAME             =                                          
    GALILEO ORBITER EARTH POS EARTH1 FLYBY TRAJ V1.0                          
    START_TIME                     = 1990-11-05T00:00:00.000                  
    STOP_TIME                      = 1991-01-01T00:00:00.000                  
    PDS3 DATA_SET_RELEASE_DATE     = 2003-03-01                               
    PRODUCER_FULL_NAME             = MARGARET G. KIVELSON                     
                                                                              
    References:                                                               
    Joy, S.P., Mafi, J.N., GALILEO ORBITER EARTH POS EARTH1 FLYBY TRAJ        
    V1.0, GO-E-POS-6-EARTH1-FLYBY-TRAJ-V1.0, NASA Planetary Data System, 2003 
                                                                              
    These data were originally archived in the following PDS3 data set:       
    GO-E-POS-6-EARTH1-FLYBY-TRAJ-V1.0 (https://doi.org/10.17189/1519648).     
                                                                              
  Collection Overview                                                         
  =================                                                           
    This collection contains the Galileo spacecraft trajectory during the     
    Earth-1 flyby. The data have been derived from SPICE kernels at a 1       
    minute sample rate. The data are provided in both  Geocentric Solar       
    Ecliptic (GSE) and Geocentric Solar Magnetic (GSM) coordinates and        
    are given in units of earth radii (Re) where 1 Re = 6378 km. These data   
    cover the interval 1990-11-05 to 1991-01-01.                              
                                                                              
  Data                                                                        
  ====                                                                        
                                                                              
    ------------------------------------------------------------------        
    Table 1. Data record structure,                                           
    ------------------------------------------------------------------        
    Column      Units     Description                                         
    ------------------------------------------------------------------        
    time        seconds   S/C event time (UT) in the PDS format               
                          (yyyy-mm-ddThh:mm:ss.sss )                          
    X           Re        S/C position X component in GSE or GSM coords.      
    Y_gse       Re        S/C position Y component in GSE coords.             
    Z_gse       Re        S/C position Z component in GSE coords.             
    Y_gsm       Re        S/C position Y component in GSM coords.             
    Z_gsm       Re        S/C position Z component in GSM coords.             
                                                                              
                                                                              
  Coordinate Systems                                                          
  ==================                                                          
    The Galileo trajectory data are being archived in 2 coordinate            
    systems.  Geocentric Solar Ecliptic (GSE) and Geocentric Solar            
    Magnetic (GSM) are related earth centered coordinate systems. Both        
    the GSE and GSM X directions are taken along the Earth - Sun line,        
    positive towards the Sun. The GSE Z direction is parallel to the          
    ecliptic normal, positive northward, and Y completes the                  
    right-handed set (towards dusk). For GSM, the X-Z plane contains          
    the Earth's dipole moment vector, positive northward, and Y               
    completes the right-handed set. GSE coordinates are commonly used         
    for analyzing the solar wind near the Earth and GSM coordinates are       
    used when analyzing data inside the Earth's bow shock.                    
                                                                              
                                                                              
  Data Processing                                                             
  ===============                                                             
    The trajectory has been derived from the Galileo SPK kernel:              
                                                                              
      'S970311A.BSP'                                                          
                                                                              
    This kernel was obtained by the PDS-PPI node from the PDS-NAIF            
    node. The code which produced the trajectory data was developed and       
    executed at PDS-PPI. This code utilized SPICE routines which were         
    developed at and distributed by PDS-NAIF. Both SPICE kernels and          
    code may be available through PDS-NAIF.                                   
                                                                              
                                                                              
  Confidence Level Overview                                                   
  =========================                                                   
    The data have been derived from the Galileo SPICE kernels using           
    well tested software from the SPICELIB and GLLSPICE subroutine            
    libraries. Each data point is computed using S/C and planetary            
    ephemerides computed at the time of the dataset sample (not               
    interpolated).