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2.73-Min Coincidence Mode and Proton Electron, and Alpha Count Rates


Availability: Archived at NSSDC, accessible from elsewhere

Time span: 1967-05-24 to 1969-05-03


This experimenter-supplied data set contains medium-energy cosmic ray count rates on binary magnetic tape written by an IBM 360 computer. Each physical record contains 10 logical records of 408 bytes (all the data for one 2.73-min telemetry sequence). Each logical record contains the time in year, month, day, and hour; ephemeris data; count rates for the medium-energy detector; and quality flags for the count rates. These tapes also contain data from data set 67-051A-09B.

Data are available online at

Alternate Names

  • 2.73-Min Count Rates


  • Space Physics: Heliospheric Studies


  • 67-051A-09B
  • 67-051A-10B

Additional Information



Questions and comments about this data collection can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. M.A. I. Van HollebekeData ProviderNASA Goddard Space Flight Center
Dr. M.A. I. Van HollebekeGeneral ContactNASA Goddard Space Flight Center
Mr. Robert M. CandeyGeneral ContactNASA Goddard Space Flight

Selected References

  • Kinsey, J. H., A study of low energy cosmic rays at 1 A.U., NASA-GSFC, TM-X-63710, X-611-69-396, Greenbelt, Md., Sept. 1969.
  • King, J. H., IMP series report/bibliography, NASA-GSFC, NSSDC 71-21, Greenbelt, Md., Dec. 1971.
  • Summary of information on GSFC IMP 4 and IMP 5 cosmic ray experiment data tapes, NASA-GSFC, NSSDC, Unnumbered, Greenbelt, MD, July 1985.
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