Data Set Overview
  =================
    This dataset 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.


  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).