Document title: Readme file for the IMP-8 GME CNTS data
TRF entry: b49066.txt in NSSDC's controlled digital document library, Aug. 1999
Document text follows:
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               README FILE FOR THE IMP 8 GME CNTS DATA 

[Prepared by H. K. Hills, August 27, 1999. This file is itself an NSSDC-served
document available at ftp://nssdc.gsfc.nasa.gov/controlled_docs/b49066.txt.]


HOME PAGES:
   http://spdf.gsfc.nasa.gov/imp8_GME/GME_home.html
   http://voycrs.gsfc.nasa.gov/lo/imp8/.


FULL TIME RESOLUTION DATA:
There are two primary data products, the so-called "CNTS" (i.e. counts) 
format files and the so-called "PHAS" (i.e. pulse-height-analysis) format
files. All VLET plus full LED and MED rate data are contained in the CNTS
files; all LED and MED pulse-height data (with appropriate normalizing rates)
are carried in the PHAS format files. See
   http://spdf.gsfc.nasa.gov/imp8_GME/GME_data_FTR.html
for further information.


DATA FORMAT DESCRIPTION FOR THE CNTS DATA:
See the page available as served by the GME project or as served by NSSDC:
 Project:
   http://voycrs.gsfc.nasa.gov/lo/imp8/cnts.html
 NSSDC:
   ftp://nssdc.gsfc.nasa.gov/controlled_docs/b49065.txt


TABLE OF IMP INTERVAL NUMBERS AND DATES: 
 Project:
   http://voycrs.gsfc.nasa.gov/lo/imp8/interval.table

 NSSDC:
   ftp://nssdc.gsfc.nasa.gov/controlled_docs/b46767.txt

The NSSDC version extends to later years but is about half the size. 

The IMP Interval Numbers are not needed for requesting data from NDADS via the
SPyCAT interface, but they are needed for requesting data via the e-mail
interface (ARMS). The interval numbers are retained because the project 
software references the files by use of the interval numbers.

The IMP GME data are contained in files of four days each, and the successive
intervals are numbered as "IMP Intervals", starting with 1 for the four-day
interval starting on September 23, 1972, which was the IMP-H (IMP 7) launch
date.