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Record Details

Record 9 of 28010
Prediction of solar energetic particle event histories using real-time particle and solar wind measurements
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Author and Affiliation:
Roelof, E. C.(Johns Hopkins Univ., Silver Spring, MD, United States)
Gold, R. E.(Johns Hopkins Univ., Silver Spring, MD, United States)
Abstract: The 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.
Publication Date: Nov 01, 1978
Document ID:
19790009952
(Acquired Nov 15, 1995)
Accession Number: 79N18123
Subject Category: SOLAR PHYSICS
Document Type: Conference Paper
Publication Information: AGARD Operational Modelling of the Aerospace Propagation Environ., Vol. 1 and 2; 13 p
Publisher Information: International Organization
Contract/Grant/Task Num: AFGL-TR-76-0136; N00017-72-C-4401
Financial Sponsor: NASA; United States
Organization Source: Johns Hopkins Univ.; Silver Spring, MD, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution within the U.S. granted by agreement
NASA Terms: ENERGETIC PARTICLES; IONOSPHERIC DISTURBANCES; PREDICTION ANALYSIS TECHNIQUES; SOLAR FLUX; SOLAR TERRESTRIAL INTERACTIONS; SOLAR WIND VELOCITY; GEOMAGNETISM; INTERPLANETARY MAGNETIC FIELDS; IONOSPHERIC PROPAGATION; RADIO WAVES; SOLAR CYCLES
Imprint And Other Notes: In AGARD Operational Modelling of the Aerospace Propagation Environ., Vol. 1 and 2 13 p (SEE N79-18094 09-31)
Miscellaneous Notes: Sponsored in part by NASA and NSF
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