Correlation Between Intensities of Auroral Absorption and Precipitated Electrons

Particle detectors on the Alouette I satellite and on rockets have been used to study the correlation between the intensity of electrons with energies greater than 40 keV and the intensity of auroral radio-wave absorption. The average relationship between the intensity of precipitated electrons and the amount of absorption is in approximate agreement with that expected from theory. For the same electron flux a day-to-night absorption ratio of about a factor of two is suggested by the measurements.