Data Set Overview
    =================
      THIS BROWSE DATA CONSISTS OF  RESAMPLED DATA FROM THE LOW ENERGY
      CHARGED PARTICLE (LECP) EXPERIMENT ON VOYAGER 2 WHILE THE
      SPACECRAFT WAS IN THE VICINITY OF SATURN.  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          : 1982-10-13
 
 
    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              : VG2
      Data Set Parameter Name         : ION RATE
      Instrument Parameter Name       : ION RATE
      Important Instrument Parameters : 1
 
      Instrument Host ID              : VG2
      Data Set Parameter Name         : ELECTRON RATE
      Instrument Parameter Name       : ELECTRON RATE
      Important Instrument Parameters : 1
 
 
    Processing
    ==========
 
      Processing History
      ------------------
        Source Data Set ID          : VG2-S-LECP-2-
        Software                    : PFAT:VGER
        Product Data Set ID         : VG2-S-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.