NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Cosmic Ray Electron Count Rate and Proton Count Rate Plots on Microfilm


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

Time span: 1978-08-15 to 1985-12-21


This data set contains multiple sets of three survey plots, showing proton count rates, electron count rates, and data coverage information. The plots are contained on one reel of 16-mm microfilm that was generated at NSSDC from the experimenter's plots. These plots are designed to be used to identify time intervals for further study and not as the basis for scientific research. The plots in each set cover the same period (in most cases 7 days) of universal time. The proton rate plots display the count rate of the special "low energy proton" coincidence, which counts protons with energies from 35 to 145 MeV and electrons from 2 to 4 MeV. The electron rate plots display the count rate of the special "low energy electron" coincidence, which counts electrons with energies above 5 MeV. Both types of plots contain eight traces that correspond to the eight optical aspect sensors. Usually these traces cannot be distinguished from each other, but when they can be resolved visually the anisotropy is well enough defined for detailed studies. The data coverage plots display five traces that summarize the operation of the instrument. Two traces, labeled DLINE and LVT-COV, indicate whether data exist at each time and the percentage of the data coverage time in each hour, respectively. The three remaining traces, labeled LVTR-PRO, LVTR-PR1, and LVTR-PR2, give the "livetime ratios" for each of the three priority channels. The livetime ratio is defined as (total number of coincidences of a given priority)/(number of pulse height-analyzed events recovered).

Alternate Names

  • C.R.Elect&Protn Cnt Rte Plts,Mflm


  • Space Physics: Heliospheric Studies


  • 78-079A-06C

Additional Information



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



NameRoleOriginal AffiliationE-mail
Prof. Paul A. EvensonData ProviderBartol Research
Prof. Paul A. EvensonGeneral ContactBartol Research
[] NASA Logo -