Data Set Overview
      =================
      This data set includes Voyager 2 Jupiter encounter magnetometer
      data given in Heliographic coordinates and averaged from the 60 ms
      instrument sample rate to a 1.92 second resampled rate. The data set
      consists of the following columns: 1) UT of the sample in the format
      yyyy-mm-ddThh:mm:ss.sssZ, 2) spacecraft clock (m65536:mod60:fds-line),
      3) magnetometer id (1 = LFM, 2 = HFM), 4) Br (radial, Sun to spacecraft,
      B-field component), 5) Bt (azimuthal B-field component, positive in
      the direction of planetary orbital motion), 6) Bn (North/South B-field
      component, positive northward), 7) Bmag (magnitude of the averaged
      components), 8) avg_Bmag (average of the magnetic field magnitudes),
      9) delta (latitude = arcsin(Bn/Bmag)), 10) lambda (longitude =
      180. - atan(Bt/Br)), 11-13) rms vectors, 14) npts (number of points
      in average). All magnetic field observations are measured in nanoTesla.
      All of the magnetic field data are calibrated (see the instrument
      calibration description for more details). The reference documents for
      this data set are: [NESSETAL1979A], [LEPPINGETAL1981],
      [CONNERNEYETAL1981], [BEHANNONETAL1981].

      [Note that the magnetic field vector descriptions given above
      are best at lower latitudes, including all latitudes reached
      by Voyager during the Jupiter encounter]

      Parameters
      ==========
        PARAMETER  RESOLUTION  DESCRIPTION
        NAME       (UNITS)

        time       1.92 Sec    time of the sample (UT) in the
                               format yyyy-mm-ddThh:mm:ss.sssZ.
                               The full sampling rate for the
                               instrument is .06 +/- .006 sec.

        m65536,    (counts)    s/c clock mod 65536, mod 60 and
        mod60 and              fds line
        fds_line

        mag_id     n/a         magnetometer ID

        magnetic   (nT)        measured parameter equaling the
        field                  magnetic field strength (e.g. in
        components             nanoTeslas) along a particular axis
        (Br, Bt, Bn)           direction. Usually the three
                               orthogonal axis components are
                               measured by three different sensors.

        magnetic   (nT)        derived parameter which combines the 3
        field vector           orthogonal magnetic field component
        (Bmag, avg_Bmag)       measurements.

        delta      n/a         delta = arcsin(Bn/Bmag)

        lambda     n/a         lambda = 180. - atan(Bt/-Br)

        rms_Br,                Pythagorean root mean square deviation
        rms_Bt, and            of the magnetic component averages
        rms_Bn

        npts       (counts)    the number of data points in the
                               current average


      Ancillary Data
      ==============
      An ancillary data file containing the derived spacecraft
      magnetic field is provided with this data at a 48 second sample
      rate. These data provide zero level offsets used in the data
      processing. S/C field data is provided in spacecraft
      coordinates as follows:

      PARAMETER  RESOLUTION  DESCRIPTION
      NAME       (UNITS)

      time       48 sec      time in format yyyy-mm-ddThh:mm:ss.sssZ
      m65536     n/a         s/c clock mod 65536
      mod60      n/a         s/c clock mod60
      mag_id     n/a         magnetometer ID
      Bx         (nT)        spacecraft coords. X component
      By         (nT)        spacecraft coords. Y component
      Bz         (nT)        spacecraft coords. Z component
      Bmag       (nT)        total magnetic field strength
      rms_Bx     (nT)        rms mag component
      rms_By     (nT)        rms mag component
      rms_Bz     (nT)        rms mag component
      npts       (counts)    number of points in average

      Data Coverage
      =============
Filename       Records         Start                    Stop
-------------------------------------------------------------------
Volume ID: VG_1502
  HG_1_92S_I.TAB 657800 1979-06-20T00:00:00.334Z  1979-07-04T23:18:21.351Z
 HG_1_92S_II.TAB 663650 1979-07-05T00:00:47.269Z  1979-07-19T23:18:20.394Z
HG_1_92S_III.TAB 571277 1979-07-20T00:00:46.311Z  1979-08-03T23:59:59.124Z
 HG_1_92S_IV.TAB 403648 1979-08-04T00:00:01.044Z  1979-08-19T00:00:42.223Z

Confidence Level Overview
      =========================
      This data set contains some data gaps and spikes. The data set
      does contain a flag value which has been provided by the PI
      (Norman Ness) that indicates whether or not a particular
      record has been contaminated by software error or by
      spacecraft interference (a flag value of 1 indicates a bad
      value, 0 indicates that the record has either not been
      evaluated or is good). Some records that are obviously
      contaminated have not been flagged. The hourly summary data
      will show a contamination code and data quality code of 2 when
      data in the hour have not been flagged but are obviously in
      error and a contamination code of 1 when the hour contains
      flagged records.

      Missing Data Flag
      =================
      Any data column whose value is greater than 1.0e+30 is a
      missing data value.