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Experiment-Mode Particle Count-Rate Plots by Solar Rotations, on Microfilm


Availability: At NSSDC, Ready for Offline Distribution (or Staging if Digital)

Time span: 1973-10-30 to 1991-10-12


This data set contains computer-generated plots of experiment-mode count rates vs time, on microfilm. Each plot covers a 30-day interval beginning on the first day of each 27-day Bartels solar rotation. Coverage begins on October 30, 1973, in rotation 1918. Plotted rates from the main detector are mainly due to protons in the energy intervals 0.5 to 11.2, 11.2 to 20.0, 20.0 to 29.8, 29.8 to 94.8, and above 94.8 MeV, and to high-energy, multiply charged nuclei (e.g., oxygen above 215 MeV/nuc). Note that the high-Z, low-energy channel responds to helium nuclei of uncertain energy and should be used with caution. The dominant species and approximate energy intervals for the plotted rates from the low-energy detector are as follows: (1) protons from 0.54 to 1.77 MeV and above 1.77 MeV, (2) He from 0.64 to 1.70 MeV/nuc, (3) C, N, and O nuclei (O from 0.83 to 3.24 MeV/nuc), and (4) Mg and heavier elements (Si above 3.0 MeV/ nuc, Fe above 1.7 MeV/nuc).

Alternate Names

  • Sol. Rot. Count Rate Plots, Mfilm


  • Space Physics: Heliospheric Studies


  • 73-078A-07C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Mr. Eugene M. MurphyGeneral ContactUniversity of

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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