DATA_SET_ID                    = "GO-E-PLS-4-SUMM-E1ET-V1.0"

DATA_SET_NAME                  = "GO EAR PLS SUMM EARTH-1 ET V1.0"
START_TIME                     = 1990-312T23:22:19.807Z
STOP_TIME                      = 1990-342T20:10:55.398Z 
DATA_SET_RELEASE_DATE          = 1995-04-19
PRODUCER_FULL_NAME             = "DR L.A. FRANK"
TARGET_NAME                    = EARTH
INSTRUMENT_HOST_ID             = GO
INSTRUMENT_ID                  = PLS

                                       NOTE 
    The data sets contained in the Earth-1 collection include 90/312-326,
    339-342.  The PLS instrument was powered down due to thermal concerns."

                                   DATA_SET_DESC 
    This file is a listing of particle energy spectra from the Galileo Plasma 
    Instrument (PLS) during the first Earth Encounter.  Detector reponses from 
    ion detetors 2P, 4P, and 6P, and from electron detector 4E are available 
    through the PDS as separate files.  The energy resolution, angular fields 
    of view, and nominal geometric factors for the detectors are specified in 
    the Instrument Description file.

    For each detector the responses (Counts/Sample-Period) are given 
    for a series of energy-per-unit charge steps (E/Q, Volts).  These 
    responses are summed over spin sectors.  The instrument is programmable, 
    and operating modes are tailored for different mission phases to acquire 
    effective measurements.  The E/Q steps and Sample Periods for different 
    mission phases (through Ida) are tabled below.

			    TABLE A
   --------------------------------------------------------------
    Mission Phase	Sample Period, 		   E/Q Steps,
			  Seconds		     Table
   --------------------------------------------------------------

      Venus	       	    0.400  		    Table B
      Earth-1		    1.333 		    Table B
      Gaspra	 	    1.200 		    Table B
      Earth-2		    1.200 		    Table B
      Ida 		    1.200 		    Table B
   ---------------------------------------------------------------

  	     TABLE B
  --------------------------------
  Step	           E/Q, Volts

	      P2,P4,P6	      E4
  --------------------------------
					 
   17            21            19        
   19            29            27        
   21            41            38        
   23            57            53        
   25            80            74        
   27           112           104        
   29           157           146        
   31           220           204        
   33           303           281        
   35           454           422        
   37           686           638        
   39           961           893        
   41          1363          1266        
   43          1958          1819        
   45          2732          2538        
   47          3788          3519        
   49          5490          5100        
   51          7777          7225        
   53         10614          9860        
   55         15189         14110        
   57         21356         19839        
   59         29829         27710        
   61         40443         37570        
   63         52521         48790                                   
    "
    

                                   REFERENCES

Frank, L.A. W.R. Paterson, and M.G.
        Kivelson, Galileo Observations of the Motions of Ion and Electron
        Plasmas in the Magnetotail, J. Geophys. Res, 20, 1771-1774, 1993"

Frank, L.A. W.R. Paterson, and M.G.
        Kivelson, Observations of Nonadiabatic Acceleration of Ions in   
        Earth's Magnetotail, J. Geophys. Res, 99, 14,877-14,890, 1994"