Data Set Overview
      =================
      Instrument P.I.                : Donald A. Gurnett
      Data Supplier                  : William S. Kurth
      Data sampling rate             : 48 seconds
      Data Set Start Time            : 1979-07-02T00:00:00.000Z
      Data Set Stop Time             : 1979-08-03T23:59:12.000Z

      Version 1.1
      -----------
      This version 1.1 data set replaces the version 1.0 data set
      (DATA_SET_ID = VG2-J-PWS-4-SA-48.0SEC) previously archived
      with the PDS. Changes to this version include upgrading of the
      associated labels and templates to PDS version 3.4 compliance
      and modification of the time formats and flag values.

      Data Set Description
      --------------------
      This data set consists of 48-second calibrated, averaged wave
      electric field intensities from the Voyager 2 Plasma Wave
      Receiver spectrum analyzer obtained in the vicinity of the
      Jovian magnetosphere. For each 48-second interval, a geometric
      average field strength is determined for each of the 16
      spectrum analyzer channels whose center frequencies range from
      10 Hertz to 56.2 kiloHertz and which are logarithmically
      spaced in frequency, four channels per decade. The time
      associated with each set of averages is the beginning of the
      averaging interval. Averages are stored in units of
      volt/meter. During data gaps where complete 48-second
      intervals are missing, no entries exist in the file, that is,
      the gaps are not zero-filled or tagged in any other way.
      Additional information about this data set and the instrument
      which produced it can be found elsewhere in this catalog. An
      overview of the data in this data set can be found in
      [GURNETTETAL1979] and a complete instrument description can be
      found in [SCARF&GURNETT1977].

      Processing Level Id            : 4
      Software Flag                  : Y
      Processing Start Time          : 1988-02-01

      Parameters
      ==========
      Sampling Parameter Name        : TIME
      Data Set Parameter Name        : PLASMA WAVE SPECTRUM
      Sampling Parameter Resolution  : 48.000000
      Minimum Sampling Parameter     : 197708201553.000000
      Sampling Parameter Interval    : 48.000000
      Minimum Available Sampling Int : 4.000000
      Data Set Parameter Unit        : VOLT/METER
      Noise Level                    : 0.000005
      Sampling Parameter Unit        : SECOND

      A set of derived parameters consisting of wave electric field
      intensities or electric field spectral densities at various
      contiguous frequencies over a range of frequencies. The MKS
      units are: Volts/Meter or Volts**2/(Hertz Meter**2),
      respectively.

      Source Instrument Parameters
      ============================
      Instrument Host ID              : VG2
      Data Set Parameter Name         : PLASMA WAVE SPECTRUM
      Instrument Parameter Names      : ELECTRIC FIELD WAVEFORM
                                        ELECTRIC FIELD COMPONENT
                                        MAGNETIC FIELD COMPONENT
                                        WAVE ELECTRIC FIELD INTENSITY
                                        WAVE MAGNETIC FIELD INTENSITY
      Important Instrument Parameters : 1 (for all parameters)

      Processing
      ==========

      Processing History
      ------------------
      Source Data Set ID          : N/A
      Software                    : UNK
      Product Data Set ID         : VG2-J-PWS-4-SA-48.0SEC

      Source Data Set ID          : VG2-J-PWS-2-SA-4.0SEC
      Software                    : V2J48
      Product Data Set ID         : VG2-J-PWS-4-SA-48.0SEC

      Software 'V1J48'
      ----------------
      Software Name               : V2J48
      Software Type               : N/A
      Software Release Date       : 1988-08-01
      Node ID                     : PPI-IOWA
      Cognizant Engineer          : LARRY J. GRANROTH
      Software Access Description : NOT ACCESSIBLE THROUGH PDS
                                    CATALOG - CONTACT NODE

      V2J48 is a specialized, hard-coded routine to process a
      specific interval of Voyager 2 PWS spectrum analyzer data
      around Jupiter encounter. Input is from MSF or CD data sets
      produced and stored at the University of Iowa, and output is
      to ASCII text files which are compatible with PDS data loading
      procedures. These files contain information corresponding to
      the VG2-J-PWS-4-SA-48.0SEC data set.

      Data Coverage
      =============
Filename   Records           Start                     Stop
---------------------------------------------------------------------------
Volume ID: VG_1502
SA_48S.TAB  56321   1979-07-02T00:00:00.000Z  1979-08-03T23:59:12.000Z

Confidence Level Overview
      =========================
      This data set includes all available spectrum analyzer data
      within the interval of time covered. The data set has been
      cleaned as well as possible for periodic noise spikes due to a
      stepper motor operating on the LECP and a modulated grid
      within the PLS. The averages do not include these noise
      spikes. Other possible sources of noise which have not been
      eliminated include a nearly continuous tone at about 311 Hz
      after closest approach due to interference from the gyros and
      random intense spikes of noise below 1 kiloHertz due to the
      operation of attitude control thrusters. The data between 0040
      and 0155 spacecraft event time on July 10 1979 is heavily
      contaminated by thruster activity associated with a trajectory
      correction maneuver. Other randomly occurring spikes or time
      periods of intense spikes over the entire frequency range are
      indicative of telemetry errors. No attempt has been made to
      remove spikes since some could be valid data, i.e. real bursts
      of wave activity. The 17.8-Hz channel is sometimes
      contaminated by interference from the PRA instrument,
      depending on that instrument's mode. This interference is at a
      relatively constant level. Also, a failure in the Voyager 2
      flight data system a few months after launch has decreased the
      sensitivity and the calibration accuracy of the upper 8
      spectrum analyzer channels (i.e. 1 kiloHertz and higher).

      Missing Data Flag
      =================
      Any columns containing the value -9.99e+10 or -9 (depending
      upon column format) is a missing data value.