The Interplanetary Monitoring Platform (IMP-8) satellite constitute
an overall program to study the near-interplanetary region, the outer
portions of the earth's magnetosphere, and the interactions of the sun-
earth system. This document describes the data processing and analysis
program systems for the cosmicra-ray experiments onboard the IMP-8
spacecraft, the data type and the available data in the database at
NSSDC and backup of database at UniTree.

• PRODUCTION
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• 
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• ANALYSIS
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• 

DATABASE ON NSSDC'S MACHINE

Each IMP-8 DECOM data file convers about 4-5 days data.

Each IMP-8 ENCY data file convers 12 days data.

Each IMP-8 CNTS/PHAS/MATR/FLUX/FLEX data file convers 4 days data.

The filename is in the TYPEINT.gz format, where        

TYPE : =DECOM  Experiment data
       =ENCY   Encyclopedia data
       =CNTS   Counts data
       =PHAS   Pulse Height data
       =MATR   Pha Summary data
       =FLUX   flux data
       =FLEX   flex data

 INT : =group number for DECOM data
       =reel sequence number for ENCY data
       =interval number for CNTS/PHAS/MATR/FLUX/FLEX data

The plot filename is in the imp8.yYYYY.djjj.dJJJ.typeT.ps.gz format, where

  YYYY : year
   jjj : julian day of starting time
   JJJ : julian day of stopping time
     T : rate plot type

         T      RATES INCLUDED
         ---------------------
         1A   DI.E.-F.-G, G, A.B.-C, A1.-B.-C, C 
          1   DI.E.-F.-G, A.B.-C, A1.-B.-C
          2   DI.E.-F.-G, DI.E.F.-G, DI.-D2.E.-F.-G, DI.E.F
          3   (A&B)1.B.-C, (A&B)1.-B.-C
          7   DI.DII.S1D.-F, DI.DII.S2D.-F, DI.DII.-F
        www   G, D.E.-F.-G, A.-B.-C, DI.DII.S1D.-F, DI.DII.S2D.-F

The pc-rate flux filename is in the YYMMDD_flux30m_gme_i8_v01.pcr format,
each file consists of flux data (71 energy boxes detail listing) averaging 30 minutes
for 6 months time period, where

    YY : last 2 digits of year
    MM : starting month
    DD : starting day of month
   
The pc-rate flux filename is in the YYMMDD_flux6hr_gme_i8_v01.pcr format,
each file consists of flux data (96 energy boxes detail listing) averaging 6 hours
for 2 years time period, where

    YY : last 2 digits of year
    MM : starting month
    DD : starting day of month
   
   

	Time Span	Data Format	Location
RATE PLOT	1973/10/31 - 2001/10/26	IEEE Binary	/ncf/bolero/pub/www/ssdoo/imp/rate_plots
RATES DATA	1973/10/31 - 2001/10/26	ASCII	/ncf/bolero/pub/www/ssdoo/imp/rates_data
RATE DATA	1973/10/31 - 2001/10/26	ASCII	/ncf/bolero/pub/www/ssdoo/imp/rate_data

Each rate plot file covers 1 hour average of 10 days rates (DI.E.-F.-G,
G, A1.-B.-C, DI.DII.S1D.-F, DI.DII.S2D.-F) data.

The filename is in the IMP8_GME_yyjjj_YYJJJ.gif format, where        

  yy : last 2 digits of starting year
 jjj : julian day of starting time
  YY : last 2 digits of stopping year
 JJJ : julian day of stopping time





In the directory /ncf/bolero/pub/www/ssdoo/imp/rate_data ,
Each rate data file covers 1 hour average rate data. A 4 column
data file consisting of X, Y, and the errors in Y. The error bar riser
is drawn from (X,Y+DY1) to (X,Y-DY2).

    X : fraction of julian day
    Y : 1 hour average rate count
  DY1 : error bar
  DY2 : error bar 

The filename is in the yYYYY.djjj.dJJJ.rateID format, where        

  YYYY : year
   jjj : julian day of starting time
   JJJ : julian day of stopping time
    ID : rate id

         ID     RATE
         01   DI.E.-F.-G
         14   G
         25   A1.-B.-C
         35   DI.DII.S1D.-F
         36   DI.DII.S2D.-F



In the directory /ncf/bolero/pub/www/ssdoo/imp/rates_data ,
Each rate data file covers 1 hour average rate data. A 3 column
data file consisting of X, Y, and the errors DY in Y.

    X : fraction of julian day
    Y : 1 hour average rate count
   DY : error bar

The filename is in the YYYY_sss_eee_ID format, where        

  YYYY : year
   sss : julian day of starting time
   eee : julian day of stopping time
    ID : rate id

          ID (rate)
         DI.E.-F.-G
         G
         A1.-B.-C
         DI.DII.S1D.-F
         DI.DII.S2D.-F

Each IMP-7/8 file covers 4 days data, each IMP-6 file covers 1 orbit data. 

The filename is in the TYPE_INT.gz format, where        

TYPE : =C   CNTS data
       =P   PHAS data
 INT : =interval number for IMP-7/8
       =orbit number for IMP-6