Interplanetary Monitoring Platform (IMP-8) Energetic Particle Experiment (EPE) Data

IMP-8 (IMP-J) was launched by NASA on October 26, 1973 to measure the
magnetic fields, plasmas, and energetic charged particles (e.g.,
cosmic rays) of the Earth's magnetotail and magnetosheath and of the
near-Earth solar wind. IMP-8 continues to operate.

The Energetic Particle Experiment (EPE) on IMP-8 provide
text-formatted data files containing energetic ion and electron count
rates and fluxes that cover a wide variety of ion species, energy
ranges, angular distributions, and time resolutions.
EPE data at JHU/APL consists of:
- 5.5 min averged intensities
- 1-day plots of 20-second averaged count rates for five key EPE
channels
- Merged data with the IMP-8 Charged Particle Measurements Experiment
(CPME)

Data at NSSDC consists of:
- Histogram Plots on Microfilm
- Four-Album Averaged Electron and Proton Data
- 20-s CPME + EPE Particle, 15-s Magnetic Field and 1-min Plasma
Merged Data Set
- 30-Min Averaged Count Rates for All Modes
- High Resolution Electron & Ion Data
- Simulated Three-Dimensional Contour Listings on Microfilm