Journal ArticleDOI
The solar longitude dependence of proton event delay time
E. Barouch,M. Gros,P. Masse +2 more
TLDR
In this paper, the relationship between heliographic longitude and the delay between flare occurrence and solar proton observation was studied using results obtained aboard HEOS A1 during 1969, and the authors ascribe this to the formation of a long-lived magnetic field configuration close to the Sun associated with a particular group of active regions.Abstract:
The relationship between heliographic longitude and the delay between flare occurrence and solar proton observation is studied using results obtained aboard HEOS A1 during 1969. The result obtained differs from previous findings. We ascribe this to the formation of a long-lived magnetic field configuration close to the Sun associated with a particular group of active regions.read more
Citations
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Journal ArticleDOI
The variation of solar proton energy spectra and size distribution with heliolongitude
TL;DR: In this paper, a statistical study of the initial phases of 185 solar particle events was carried out using the data from cosmic ray experiments on IMP 4 and IMP 5, and the existence of a preferred-connection longitude between 20 W and 80 W was established by examining the heliolongitude of all the flare associated events.
Journal ArticleDOI
Propagation of flare protons in the solar atmosphere
R. Reinhard,G. Wibberenz +1 more
TL;DR: In this paper, the velocity dispersion for a large number of solar proton events is analyzed in the energy regime of 10-60 MeV and it is shown that the time from the flare to particle maximum is well represented by a sum of two components.
Journal ArticleDOI
Energetic Particle Observations
Berndt Klecker,H. Kunow,Hilary V. Cane,Silvia Dalla,Bernd Heber,Karoly Kecskemety,Karl-Ludwig Klein,József Kóta,Harald Kucharek,David Lario,M. A. Lee,Mark A. Popecki,A. Posner,Javier Rodriguez-Pacheco,T. R. Sanderson,G. M. Simnett,E. C. Roelof +16 more
TL;DR: The characteristics of solar energetic particles (SEP) as observed in interplanetary space provide fundamental information about the origin of these particles and the acceleration and propagation processes at the Sun as discussed by the authors.
Journal ArticleDOI
Development of a complex of activity in the solar corona
Robert Howard,Zdeněk Švestka +1 more
TL;DR: In this article, Skylab observations of the Sun in soft X-rays gave the first possibility to study the development of a complex of activity in the solar corona during its whole lifetime of seven solar rotations.
Journal ArticleDOI
PPS-87: A New Event Oriented Solar Proton Prediction Model
D.F. Smart,M.A. Shea +1 more
TL;DR: A new event-oriented solar proton prediction model has been developed and implemented at the USAF Space Environment forecast facility and converts the predicted solar particle flux into an expected radiation dose that might be experienced by an astronaut during EVA activities or inside the space shuttle.
References
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Journal ArticleDOI
A diffusive model for the initial phase of a solar proton event
TL;DR: In this paper, an attempt is made to treat the diffusion through the solar atmosphere in a quantitative fashion, and the results are applied to measurements carried out by Explorer 12 on September 28, 1961.
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Anisotropic diffusion of solar cosmic rays
TL;DR: In this article, a mathematical model is presented, and a relatively simple solution is obtained that describes the basic characteristics of solar cosmic-ray propagation, and it is demonstrated that the solution of the diffusion equation does apply during the anisotropic phase of several events.
Journal ArticleDOI
Solar cosmic ray phenomena
K. G. McCracken,U. R. Rao +1 more
TL;DR: In this paper, the authors present an integrated view of the several types of solar cosmic ray phenomena and present a single model to explain the various species of delayed event, including the halo and core events, energetic storm particle events, EDP events and proton recurrent regions.
Journal ArticleDOI
Comparison of solar cosmic rays injection including July 17, 1959, and May 4, 1960
TL;DR: In this paper, it was shown that the time scale of the cosmic-ray flare effect is a highly variable quantity, varying by a factor as great as 36 from event to event.