Satellite OV 5-6 Measured Solar Proton Event Alpha/Proton Flux Ratios and Associated Atmospheric Effects.
Abstract
The time dependence of satellite OV5-6 measured proton and alpha fluxes has been determined for a series of events in the 1969-73 descent period of solar cycle 20. These fluxes have been used to investigate the variation of the alpha/proton flux ratio both within a given event and from event-to-event. An approximate relationship between riometer absorption and the square root of proton flux (above a threshold energy of 2.2 MeV) for nighttime PCA conditions is presented which is similar to that previously used for day conditions. By use of a new formulation the proton fluxes are used to make an accurate calculation of the absorption and this is compared with both the approximate and measured values. Also discussed are possible uses of alpha/proton measurements made soon after event onset for later time predictions, in particular the time evolution of absorption. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1976
- Accession Number
- ADA021909
Entities
People
- Bach Sellers
- Frederick A. Hanser