Electrons with energies from 10 to 100 keV were measured by an electrostatic analyzer flown on OAR satellite OV3-1 (1966-34A). Spherical quadrants were used to focus the electrons into a thin Pilot B scintillator. The exponential energy parameter (E sub o) and power-law energy parameter (gamma) were determined for electrons mirroring in the auroral zone. For slowly varying precipitation events when K sub p = or> 3, spectra before local midnight were softer than those after local midnight. At high latitudes, enhanced fluxes of electrons were seen only during periods of enhanced magnetic activity. The spectra parameters did not seem to depend upon K sub p. (Author).

Electrons with energies from 10 to 100 keV were measured by an electrostatic analyzer flown on OAR satellite OV3-1 (1966-34A). Spherical quadrants were used to focus the electrons into a thin Pilot B scintillator. The exponential energy parameter (E sub o) and power-law energy parameter (gamma) were determined for electrons mirroring in the auroral zone. For slowly varying precipitation events when K sub p = or> 3, spectra before local midnight were softer than those after local midnight. At high latitudes, enhanced fluxes of electrons were seen only during periods of enhanced magnetic activity. The spectra parameters did not seem to depend upon K sub p. (Author).

Particle flux measurements made with particle detectors aboard a polar orbiting satellite near the northern auroral zone were correlated with radio attenuation and optical measurements on auroras. The incident particle energy deposition was measured in two plastic scintillators shielded by aluminum foils. The detector thresholds correspond to 2 and 28 kev electron energy respectively. Data were obtained for six satellite passes over the auroral zone. Analysis shows good spatial and temporal correlation of particle flux measurements from the satellite and data from ground-based optical and radio detectors. Large variations in the energy distribution of the observed particles were indicated by large changes in the ratio of the detector outputs. For portion of four passes, incident particle information was acquired simultaneously with optical and radio measurements. From data on one well-defined auroral form, comparison was made between the observed luminosity distribution and the distribution calculated from the particle data. (Author).