File: P11CPIHR_FMT.txt                    Version: NSSDC 05/13/2002 JFC
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PIONEER 11 CHARGED PARTICLE INSTRUMENT (CPI): 
HOURLY INTERPLANETARY COUNTING RATES

Principal Investigator: Professor John A. Simpson (deceased, 2000)
                        Laboratory for Astrophysics and Space Research
                        University of Chicago

Time Coverage: 1973-04-06 to 1992-11-27

Data Source: off-line NSSDC archive, data set ID 1973-019A-02D

Data Files:

   P11CPyyn.asc -> daily averages for date block yyn

      yyA -> first six months of year yy
      yyB -> second six months of year yy

   P11CPI_NMC.txt   -> CPI experiment document from NSSDC Master Catalog

   P11CPI_15M.sfdu  -> SFDU document for related 15-min NSSDC data set
    
Parameter List:

IY     = Year (yy)                   [SCET-UT]
IDOY   = Day of year (1 = Jan. 1)    [SCET-UT]
IH     = Hour                        [SCET-UT]
RID2P  = ID-2 rate for 11-20 MeV protons [cps] 
RID2HE = ID-2 rate for 11-20 MeV/nucleon helium [cps]
RID3P  = ID-3 rate for 20-24 MeV protons [cps]
RID3HE = ID-3 rate for 20-24 MeV/nucleon helium [cps]
RID4P  = ID-4 rate for 24-29 MeV protons [cps]
RID4HE = ID-4 rate for 24-29 MeV/nucleon helium [cps]
RID5P  = ID-5 rate for 29-67 MeV protons [cps]
RID5HE = ID-5 rate for 29-67 MeV/nucleon helium [cps]
RID5E1 = ID-5 rate for 7-17 MeV electrons [cps]
RID5E2 = ID-5 rate for 2 x minimum-ionizing [cps]
RID7   = ID-7 + ID-13 integral rate for ions at E > 67 MeV/nucleon [cps]
RID7ZG5= ID-7 integral rate for Z > 5 ions at E > 67 MeV/nucleon [cps]
              
Parameter READ Format:

      READ(5,10) IY,IDOY,IH,RID2P,RID2HE,RID3P,RID3HE,RID4P,
     *   RID4HE,RID5P,RID5HE,RID5E1,RID5E2,RID7,RID7ZG5
10    FORMAT(1X,I2,1X,I3,1X,I2,12(1PE10.2))

Note: These rates were calculated as averages from fifteen-minute average
counts and accumulation times by the pseudocount method described in the
Pioneer 11 CPI dataset documentation.

Related Information and Data:

Further details on the spacecraft, experiment, data sets at NSSDC, and related
WWW sites can be found on the Pioneer 10/11 flight project page under

http://nssdc.gsfc.nasa.gov/space/

Hour averages of the interplanetary solar wind data from, and hourly heliocentric
coordinates of, Pioneer 10/11 and other interplanetary spacecraft may be also
be accessed and plotted on-line through the COHOWeb service based at the same
WWW site as above.

Acknowledgement:

Use of these data in publications should be accompanied at minimum by
acknowledgements of the National Space Science Data Center and the responsible
Principal Investigator defined in the experiment documentation provided here.