Computer Science
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985icrc....5..210p&link_type=abstract
In NASA. Goddard Space Flight Center 19th Intern. Cosmic Ray Conf., Vol. 5 p 210-213 (SEE N85-34991 23-93)
Computer Science
Cosmic Rays, Galactic Radiation, Heliosphere, Solar Wind, Solar Wind Velocity, Energy Spectra, Pioneer 10 Space Probe, Pioneer 11 Space Probe, Propagation Velocity, Solar Activity, Solar Cycles
Scientific paper
Near solar maximum, a series of large radial solar wind shocks in June and July 1982 provided a unique opportunity to study the solar modulation of galactic cosmic rays with an array of spacecraft widely separated both in heliocentric radius and longitude. By eliminating hysteresis effects it is possible to begin to separate radial and azimuthal effects in the outer heliosphere. On the large scale, changes in modulation (both the increasing and recovery phases) propagate outward at close to the solar wind velocity, except for the near-term effects of solar wind shocks, which may propagate at a significantly higher velocity. In the outer heliosphere, azimuthal effects are small in comparison with radial effects for large-scale modulation at solar maximum.
Pyle Roger K.
Simpson André J.
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