Prediction of solar energetic particle event histories using real-time particle and solar wind measurementsThe comparatively well-ordered magnetic structure in the solar corona during the decline of Solar Cycle 20 revealed a characteristic dependence of solar energetic particle injection upon heliographic longitude. When analyzed using solar wind mapping of the large scale interplanetary magnetic field line connection from the corona to the Earth, particle fluxes display an approximately exponential dependence on heliographic longitude. Since variations in the solar wind velocity (and hence the coronal connection longitude) can severely distort the simple coronal injection profile, the use of real-time solar wind velocity measurements can be of great aid in predicting the decay of solar particle events. Although such exponential injection profiles are commonplace during 1973-1975, they have also been identified earlier in Solar Cycle 20, and hence this structure may be present during the rise and maximum of the cycle, but somewhat obscured by greater temporal variations in particle injection.
Document ID
19790009952
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roelof, E. C. (Johns Hopkins Univ. Silver Spring, MD, United States)
Gold, R. E. (Johns Hopkins Univ. Silver Spring, MD, United States)
Date Acquired
August 10, 2013
Publication Date
November 1, 1978
Publication Information
Publication: AGARD Operational Modelling of the Aerospace Propagation Environ., Vol. 1 and 2