A Study of the D-Region Ionosphere during the Intense Solar Particle Events of August 1972.
LOCKHEED MISSILES AND SPACE CO INC PALO ALTO CALIF PALO ALTO RESEARCH LAB
Pagination or Media Count:
During the intense solar particle events of 3-11 August 1972 twenty-eight cases of simultaneous data were obtained between the polar orbiting satellite 1971-089A and the incoherent-scatter radar at Chatanika, Alaska. These data were analyzed to derive effective electron loss rates in the D-region ionosphere as a function of altitude, solar zenith angle and the magnitude of the production rate. Production rate profiles extending from 300 to 30,000 ion-pairscc sec were calculated for the 40-90 km region. Electron density profiles extending from 5000 to 100,000 elcc were measured in the D-region at Chatanika, with useful data being obtained down to altitudes as low as 50 km. Values of electron loss rate were obtained for daytime and sumrisesunset twilight conditions over a range of solar zenith angles from 50.4 degrees to 98.6 degrees.
- Atmospheric Physics