Data Set Overview
    =================
      THIS DATA SET CONTAINS THE DERIVED VALUES FOR THE ELECTRON
      MOMENT DENSITY AND TEMPERATURE AT JUPITER IN THE PLS ENERGY
      RANGE (10-5950 EV) DURING THE VOYAGER 2 ENCOUNTER.  ADJACENT
      LOW AND HIGH ENERGY ELECTRON MEASUREMENTS ARE COMBINED TO FORM
      A COMPOSITE SPECTRA WHICH IS USED FOR THE MOMENT CALCULATION.
      THE MOMENT CALCULATIONS ARE PERFORMED AS DESCRIBED IN SCUDDER
      ET AL. (1981).  THESE ASSUME ISOTROPIC DISTRIBUTIONS AND
      CORRECT FOR POSITIVE SPACECRAFT CHARGE WHEN APPLICABLE AND
      INTERPOLATE ELECTRON SPECTRA BELOW THE 10 EV INSTRUMENT
      THRESHOLD BEFORE PERFORMING THE INTEGRATION OVER VELOCITY.
      DATA FORMAT: COLUMNS 1-6 ARE TIME (YEAR, DAY, HOUR, MIN, SEC,
      MSEC) COLUMN 7 IS THE MOMENT DENSITY IN CM-3, COLUMN 8 THE
      TEMPERATURE IN EV.  EACH ROW HAS FORMAT (6I4, 2E12.3).  VALUES
      OF 1.E32 INDICATE THAT THE PARAMETER COULD NOT BE OBTAINED FROM
      THE DATA USING THE STANDARD ANALYSIS TECHNIQUE.  ADDITIONAL
      INFORMATION ABOUT THIS DATASET 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 SCUDDER
      ET AL.  (1981) AND A COMPLETE INSTRUMENT DESCRIPTION CAN BE
      FOUND IN BRIDGE (1977).
 
 
      Processing Level Id            : 5
      Software Flag                  : Y
      Processing Start Time          : UNK
      Processing Stop Time           : UNK
 
 
    Parameters
    ==========
      Sampling Parameter Name        : TIME
      Data Set Parameter Name        : ELECTRON DENSITY
      Sampling Parameter Resolution  : 96.000000
      Sampling Parameter Interval    : 96.000000
      Minimum Available Sampling Int : 96.000000
      Data Set Parameter Unit        : CM-3
      Sampling Parameter Unit        : SECOND
 
 
      Description
      -----------
        A derived parameter giving an indication of the mean A
        derived parameter equaling the number of electrons per unit
        volume over a specified range of electron energy.
        energy/electron, assuming the shape of the electron energy
        Different forms of electron density are derived spectrum to
        be Maxwellian (i.e.highest entropy shape).  Given
        distinguished by method of derivation (Maxwellian fit, that
        the electron energy spectrum is not exactly Maxwellian,
        method of moments) or by the some selection criteria (ie.,
        the electron temperature can be defined integrally (whereby
        the mean energy obtained by integrating under the actual hot
        electron and cold electron density).  In general, if more
        electron energy spectrum is set equal to the integral under
        than one electron component is analyzed, either by moment or
        fit, a total density will be provided which is the sum of a
        Maxwellian, where the temperature is a free parameter for the
        electron densities.  If the electron do not have a which to
        solve), or differentially (whereby the slopes of Maxwellian
        distribution the actual distribution can be the actually
        electron energy spectrum at various energies are matched to
        the slopes of a corresponding Maxwellian).  represented as
        the sum of several Maxwellians, in which case the density of
        each Maxwellian is given.  The temperature parameter is often
        qualified with a range of applicable energies.  temperatures
        can be angularly anisotropic.  If the electrons do not have a
        Maxwellian distribution the actual distribution can be
        represented as the sum of several Maxwellians, each with a
        separate temperature.
 
 
    Source Instrument Parameters
    ============================
      Instrument Host ID              : VG2
      Data Set Parameter Name         : ELECTRON DENSITY
      Instrument Parameter Name       : ELECTRON RATE
      Important Instrument Parameters : 1
 
      Instrument Host ID              : VG2
      Data Set Parameter Name         : ELECTRON DENSITY
      Instrument Parameter Name       : ELECTRON CURRENT
      Important Instrument Parameters : 1
 
      Instrument Host ID              : VG2
      Data Set Parameter Name         : ELECTRON TEMPERATURE
      Instrument Parameter Name       : ELECTRON RATE
      Important Instrument Parameters : 1
 
      Instrument Host ID              : VG2
      Data Set Parameter Name         : ELECTRON TEMPERATURE
      Instrument Parameter Name       : ELECTRON CURRENT
      Important Instrument Parameters : 1
 
 
    Processing
    ==========
 
      Processing History
      ------------------
        Source Data Set ID          : VG2-PLS
        Software                    : UNK
        Product Data Set ID         : VG2-J-PLS-5-ELE-MOM-96.0SEC

Overview
    ========
      THIS DATA SET PROVIDES THE BEST ESTIMATE AVAILABLE OF THE TOTAL
      ELECTRON DENSITY IN THE PLS ENERGY RANGE (10-5950 EV).  FOUR
      ASSUMPTIONS WERE MADE 1) SECONDARY ELECTRONS ESCAPING FROM THE
      COLLECTOR PLATE OF THE DETECTOR WERE NEGLECTED; 2)
      EXTRAPOLATIONS WERE MADE TO ESTIMATE THE NUMBER OF ELECTRONS
      OUTSIDE THE PLS ENERGY RANGE; 3) ELECTRONS WERE ASSUMED TO HAVE
      ISOTROPIC DISTRIBUTIONS; 4) WHERE THE SPACECRAFT POTENTIAL WAS
      SMALL THE SHAPE OF THE THERMAL ELECTRON SPECTRA WAS USED TO
      ESTIMATE THE CHARGE AND CORRECT THE DERIVED DENSITIES.  1)
      SHOULD RESULT IN AN UNDERESTIMATE OF THE ELECTRON DENSITY BY NO
      MORE THAN 10% FOR TE < 100EV AND NO MORE THAN 30% FOR TE >
      100EV.  2) GIVES UNCERTAINTIES OF AT MOST 10%, AND USUALLY MUCH
      SMALLER, FOR TE = 5-3000 EV WHICH IS THE TE RANGE MEASURED IN
      THIS REGION.  3) SHOULD BE AN EXCELLENT ASSUMPTION SINCE
      ISOTROPIZATION TIMES FOR ELECTRONS ARE FAST, AND SINCE THE
      ELECTRON THERMAL SPEED IS ALWAYS MUCH GREATER THAN THE PLASMA
      FLOW SPEED.  4) IN REGIONS WHERE THE SPACECRAFT CHARGE IS
      POSITIVE, CHARGING PRODUCES UNCERTAINTIES OF AT MOST 10%.
      VALUES OF TE IN ALL REGIONS HAVE UNCERTAINTIES APPROXIMATELY
      EQUAL TO THE DENSITY UNCERTAINTIES.