Interplanetary Monitoring Platform (IMP-8) Electrostatic Energy-Charge Analyzer (EECA) 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 Electrostatic Energy-Charge Analyzer (EECA) is the University of
Maryland experiment on the IMP-8 satellite. Online plots and data of
selected rates from EECA since 1990 are available from UMD
(http://imp8.umd.edu/). Each plot covers one orbit,
and each is color-coded to show the nominal positions of the bow shock
and the magnetopause. Data are available from the P3, P5, P7 and A2
detectors.

Complete data are available from NSSDC including:
- Ion and Electron Summary Data
- Solar Ion and Electron Count Rates on Encyclopedia Files
- Hourly Average Low Energy Protons(.16-.22 MeV) Data
- 10-Min Averaged, 220-KeV Proton Count Rate Plots on Microfilm
- 11-min Fluxes from EECA Instrument
- Solar Geophysical Data