Data Set Overview
    =================
    THIS BROWSE DATA CONSISTS OF RESAMPLED DATA FROM THE LOW
    ENERGY CHARGED PARTICLE (LECP) EXPERIMENT ON VOYAGER 1
    WHILE THE SPACECRAFT WAS IN THE VICINITY OF JUPITER. THIS
    INSTRUMENT MEASURES THE INTENSITIES OF IN-SITU CHARGED
    PARTICLES (>26 KEV ELECTRONS AND >30 KEV IONS) WITH VARIOUS
    LEVELS OF DISCRIMINATION BASED ON ENERGY, MASS SPECIES, AND
    ANGULAR ARRIVAL DIRECTION. A SUBSET OF ALMOST 100 LECP
    CHANNELS ARE INCLUDED WITH THIS DATA SET. THE LECP DATA ARE
    GLOBALLY CALIBRATED TO THE EXTENT POSSIBLE (SEE BELOW) AND
    THEY ARE TIME AVERAGED TO ABOUT 15 MINUTE TIME INTERVALS
    WITH THE EXACT BEGINNING AND ENDING TIMES FOR THOSE
    INTERVALS MATCHING THE LECP INSTRUMENTAL CYCLE PERIODS (THE
    ANGULAR SCANNING PERIODS). THE LECP INSTUMENT HAS A
    ROTATING HEAD FOR OBTAINING ANGULAR ANISOTROPY MEASUREMENTS
    OF THE MEDIUM ENERGY CHARGED PARTICLES THAT IT MEASURES.
    THE CYCLE TIME FOR THE ROTATION IF VARIABLE, BUT DURING
    ENCOUNTERS IT IS ALWAYS FASTER THAN 15 MINUTES. FOR THIS
    BROWSE DATA SET ONLY SCAN AVERAGE DATA IS GIVEN (NO ANGULAR
    INFORMATION). THE DATA IS IN THE FORM OF 'RATE' DATA WHICH
    HAS NOT BEEN CONVERTED TO THE USUAL PHYSICAL UNITS. THE
    REASON IS THAT SUCH A CONVERSION WOULD DEPEND ON UNCERTAIN
    DETERMINATIONS SUCH AS THE MASS SPECIES OF THE PARTICLES
    AND THE LEVEL OF BACKGROUND. BOTH MASS SPECIES AND
    BACKGROUND ARE GENERALLY DETERMINED FROM CONTEXT DURING THE
    STUDY OF PARTICULAR REGIONS. TO CONVERT 'RATE' TO
    'INTENSITY' FOR A PARTICULAR CHANNEL ONE PERFORMS THE
    FOLLOWING TASKS: 1) DECIDE ON THE LEVEL OF BACKGROUND
    CONTAMINATION AND SUBTRACT THAT OFF THE GIVEN RATE LEVEL.
    BACKGROUND IS TO BE DETERMINED FROM CONTEXT AND FROM MAKING
    USE OF SECTOR 8 RATES (SECTOR 8 HAS A 2 mm AL SHIELD
    COVERING IT). 2) DIVIDE THE BACKGROUND CORRECTED RATE BY
    THE CHANNEL GEOMETRIC FACTOR AND BY THE ENERGY BANDPASS OF
    THE CHANNEL. THE GEOMETRIC FACTOR IS FOUND IN ENTRY
    'channel_geometric_ factor' AS ASSOCIATED WITH EACH CHANNEL
    'channel_id'. TO DETERMINE THE ENERGY BANDPASS, ONE MUST
    JUDGE THE MASS SPECIES OF THE OF THE DETECTED PARTICLES
    (FOR IONS BUT NOT FOR ELECTRONS). THE ENERGY BAND PASSES
    ARE GIVEN IN ENTRIES 'minimum_instrument_parameter' and
    'maximum_instrument_ parameter' IN TABLE 'FPLECPENERGY',
    AND ARE GIVEN IN THE FORM 'ENERGY/NUCLEON'. FOR CHANNELS
    THAT BEGIN THEIR NAMES WITH THE DESIGNATIONS 'CH' THESE
    BANDPASSES CAN BE USED ON MASS SPECIES THAT ARE ACCEPTED
    INTO THAT CHANNEL (SEE ENTRIES
    'minimum_instrument_parameter' and 'maximum_instrument_
    parameter' IN TABLE 'FPLECPCHANZ', WHICH GIVE THE MINIMUM
    AND MAXIMUM 'Z' VALUE ACCEPTED -- THESE ENTRIES ARE BLANK
    FOR ELECTRON CHANNELS). FOR OTHER CHANNELS THE GIVEN
    BANDPASS REFERS ONLY TO THE LOWEST 'Z' VALUE ACCEPTED. THE
    BANDPASSES FOR OTHER 'Z' VALUES ARE NOT ALL KNOWN, BUT SOME
    ARE GIVEN IN THE LITERATURE (E.G. KRIMIGIS ET AL., 1979).
    THE FINAL PRODUCT OF THESE INSTRUCTIONS WILL BE THE
    PARTICLE INTENSITY WITH THE UNITS:
    COUNTS/(CM**2.STR.SEC.KEV). SOME CHANNELS ARE SUBJECT TO
    SERIOUS CONTAMINATIONS, AND MANY OF THESE CONTAMINATIONS
    CANNOT BE REMOVED EXCEPT WITH A REGION-BY-REGION ANALYSIS,
    WHICH HAS NOT BEEN DONE FOR THIS DATA. THUS, TO USE THIS
    DATA IT IS ABSOLUTELY VITAL THAT THE CONTAMINATION TYPES
    ('contamination_id' , 'contamination_desc') AND THE LEVELS
    OF CONTAMINATION ('data_quality_id' CORRESPONDING TO THE
    DEFINITIONS 'data_quality_desc') BE CAREFULLY EXAMINED FOR
    ALL REGIONS OF STUDY. A DEAD TIME CORRECTION PROCEDURE HAS
    BEEN APPLIED IN AN ATTEMPT TO CORRECT THE LINEAR EFFECTS OF
    DETECTOR OVERDRIVE (PULSE-PILEUP). THIS PROCEDURE DOES NOT
    FIX SEVERELY OVERDRIVEN DETECTORS. A PROCEDURE IS AVAILABLE
    FOR CORRECTING VOYAGER 2 LECP ELECTRON CONTAMINATION OF LOW
    ENERGY ION CHANNELS, BUT ITS EFFECTIVENESS HAS BEEN
    EVALUATED ONLY FOR THE URANUS DATA SET. THUS, CORRECTIONS
    HAVE BEEN APPLIED ONLY TO THE URANUS DATA SET.
 
 
  Processing Level Id            : 4
  Software Flag                  : Y
  Processing Start Time          : 1988-08-01
 
 
  Parameters
  ==========
  Sampling Parameter Name        : TIME
  Data Set Parameter Name        : ELECTRON RATE
  Sampling Parameter Resolution  : 15.000000
  Sampling Parameter Interval    : 15.000000
  Data Set Parameter Unit        : COUNTS/SECOND
  Noise Level                    : 0.000000
  Sampling Parameter Unit        : MINUTE
 
 
    Description
    -----------
      A measured parameter equaling the number of electrons
      A measured parameter equaling the number of ions striking a
      hitting a particle detector per specified accumulation
      particle detector per specified accumulation interval. The
      interval. The counted electrons may or may not be
      counted ions may or may not be discriminated as to their
      energies (e.g. energy/nucleon or energy/charge between E1
      discriminated as to their energies (e.g. greater than E1, or
      between E1 and E2).
      and E2 or greater than E1) and/or as to their ion
      composition (atomic number Z or mass number greater than Z1
      or M1, or between Z1 and z2 or M1 and M2).
 
 
    Source Instrument Parameters
    ============================
    Instrument Host ID              : VG1
    Data Set Parameter Name         : ION RATE
    Instrument Parameter Name       : ION RATE
    Important Instrument Parameters : 1
 
    Instrument Host ID              : VG1
    Data Set Parameter Name         : ELECTRON RATE
    Instrument Parameter Name       : ELECTRON RATE
    Important Instrument Parameters : 1
 
 
    Processing
    ==========
 
      Processing History
      ------------------
      Source Data Set ID          : VG1-J-LECP-2-
      Software                    : PFAT:VGER
      Product Data Set ID         : VG1-J-LECP-4-BR-15MIN
 
 
      Software 'PFAT:VGER'
      --------------------
      Software Name               : PFAT:VGER
      Software Type               : PIN
      Software Release Date       : N/A
      Node ID                     : N/A
      Cognizant Engineer          : N/A
      Software Access Description : N/A

Overview
    ========
    AT ALL TIMES DURING THIS PLANETARY ENCOUNTER THERE EXIST
    DATA IN THIS DATA SET THAT CAN BE RATED WITH THE HIGHEST
    CONFIDENCE LEVEL. HOWEVER, SOME OF THE CHANNELS OF DATA ARE
    CONTAMINATED BY VARIOUS KINDS AND VARIOUS LEVELS OF
    CONTAMINATIONS. IT IS THEREFORE IMPERATIVE, IN USING THIS
    DATA SET, THAT THE CONTAMINATION TABLES WITHIN THE CATALOG
    BE EXAMINED. ALSO, NOT ALL KINDS OF CONTAMINATION HAVE BEEN
    FULLY DOCUMENTED. WHEN IN DOUBT THE DATA SUPPLIER MUST BE
    CONTACTED.