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Time-Ordered, Sectored Count-Rate and Pulse-Height Data


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1973-10-30 to 1997-02-02


This data set contains essentially all nonredundant charged particle data telemetered from the experiment, sorted in time order with overlap periods eliminated. Data are recorded on binary magnetic tape. Each file contains the same number of 1952-character physical records. Each record has a 32-character header containing time, bit rate, and status information followed by four 480-character "pages" of data. Each page represents 20.48 or 81.92 s of data, depending upon the telemetry bit rate (1600 bps or 400 bps, respectively). Individual sectored and unsectored rates listed on a page have accumulation times ranging from 1 to 1/8 of the above time. Rates are written in a log-compressed format. Also listed on each page are up to 32 pulse-height events from the main telescope (with sectors) and up to 16 pulse heights from the low-energy telescope (with sectors).

Data are available online at

Alternate Names

  • Rate and PHA Data


  • Space Physics: Heliospheric Studies


  • 73-078A-07A

Additional Information



Questions and comments about this data collection can be directed to: Dr. H. Kent Hills



NameRoleOriginal AffiliationE-mail
Mr. Eugene M. MurphyGeneral ContactUniversity of
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight

Selected References

  • Mason, G. M., and W. W. Mixon, University of Chicago charged particle experiments on IMP-7 and IMP-8 - instrument and data format descriptions, U. of Chicago, Enrico Fermi Inst., Lab. for Astrophys. and Space Res., Preprint No. 75-45, Chicago, IL, July 1975.
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