Boundary of the penetration of solar cosmic rays into the earth's magnetosphere at magnetically quiet times

Computer Science – Sound

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Earth Environment, Incident Radiation, Magnetospheric Instability, Satellite Sounding, Solar Cosmic Rays, Cosmos Satellites, Intercosmos Satellites, Solar Protons, Solar Wind

Scientific paper

Data from Intercosmos-17 and Cosmos-900 acquired during November 22-25, 1977 are used to construct the boundary of penetration into the high-latitude magnetosphere of electrons with energy not less than 30 keV and protons with energies of 1, 4, 10-13, 30, and 100 MeV. It is shown that these particles penetrate to lower latitudes than is predicted by theoretical calculations. An interrelationship is found between solar-wind pressure on the magnetosphere and the location of the penetration boundary of solar-cosmic-ray protons with Ep not less than about 1 MeV. The structural features of the daytime boundary of solar-cosmic-ray penetration are shown to be determined by the splitting of drift shells and nonadiabatic effects during the motion of particles in the asymmetric geomagnetic field.

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