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Voyager 1 LECP Cosmic Ray Data Archive


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

Time span: 1977-09-07 to 1994-12-31


This cruise data collection from the Low Energy Charged Particle (LECP) experiment consists of one data file, including ASCII dataset documentation and data listings. The data include daily average counting rates and statistical uncertainties for eleven differential energy proton/ion channels (30 keV - 20 MeV) and one integral channel (>70 MeV protons) from the LECP experiment. Each day of data is listed with respect to start time in Spacecraft Event Time - UT of each day. Uncertainties are calculated as the inverse square root of the total number of accumulated counts times the average count rate. Missing data rates due to tracking gaps, and deleted bad data rates, have been given the value "-99.0". The daily average rates are summed over many 360 degree scans of the LECP sensors (192 seconds or six minutes per scan over eight 45-degree sectors) and correspond to measurements of omnidirectional fluxes. The dataset documentation in the header section includes tables for conversion of rates to differential fluxes for each rate channel. Further details of responses for the LECP rate channels can be found in the references for this dataset.

This collection is available on-line at:

Alternate Names

  • 24-Hr LECP Cosmic Ray Cruise Data


  • Space Physics: Heliospheric Studies


  • 77-076A-07J
  • 77-084A-07H

Additional Information



Questions and comments about this data collection can be directed to: Dr. John F. Cooper



NameRoleOriginal AffiliationE-mail
Dr. Stamatios M. KrimigisData ProviderApplied Physics
Dr. Robert B. DeckerGeneral ContactApplied Physics

Selected References

  • Krimigis, S. M., et al., The low energy charged particle (LECP) experiment on the Voyager spacecraft, Space Sci. Rev., 21, No. 3, 329-354, doi:10.1007/BF00211545, Dec. 1977.
  • Krimigis, S. M., et al., Characteristics of the hot plasma in the Jovian magnetosphere: Results from the Voyager spacecraft, J. Geophys. Res., 86, No. A10, 8227-8258, doi:10.1029/JA086iA10p08227, Sept. 1981.
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