Observations of angular distributions of low energy electron intensities over the auroral zones with Ariel 4

Comprehensive measurements of the angular distributions of low energy electron intensities have been gained with a pair of electrostatic analysers, or Lepedeas, carried on the low altitude satellite Ariel 4. This present report summarizes initial observations of the angular distributions of electron intensities within the energy range 244 eV to 10.8 keV at an altitude of approximately 570 km over the localevening sector of the auroral zone.