ABSTRACT: DMSP SSJ/4 data provide a complete energy spectrum of the low energy particles that cause the aurora and other high atitude phenomena. The data set consists of electron and ion particle fluxes between 30 eV and 30 KeV recorded every second, satellite ephemeris and magnetic coordinated where the particles are likely to be absorbed by the atmosphere. Differential particle fluxes may be as ... large as 10 at the lowest energies. The detectors also record high energy ions that penetrate both the satellite and the instrument. This is most noticeable in the South Atlantic Anomaly and the "horns" of the radiation belts.
SUPPLEMENTAL INFORMATION: Hardy, D.A., et al. September 1979. The precipitating electron detector (SSJ/3) for the block 5D/flights 2-5. DMSP satellites calibration and data presentation. Air Force Geophysics Laboratory. Space Physics Division Project 7601.Observing station type: Satellite. Observing station name: DMSP Block 5D: F1, F2, F3, F4. Instrumentation: Special Sensor J, Version 3, SSJ-3. Data collection type: Grid.Quality control: Satellite readouts may be out of chronological order. For some dates, the instruments were operated above 45 degrees only or during daytime only. Low energy photoelectrons are recorded equatorward of the auroral zone. Both types of channeltrons are very stable and show no degradation with time. No effort is made to correct erroneous spikes, which occur less than 0.01 percent of the time. High energy proton contamination exists for the South Atlantic Anomaly, 0-70 degrees south and 15 degrees east-60 degrees west. Plasmasphere contamination occurs in the higher energy channels just equatorward of the auroral zone. The 5.5- and 9-Kev channels on satellite F3 malfunctioned.
CURRENTNESS REFERENCE: Ground Condition