High Energy Cosmic Ray Nuclei Results on Ulysses: 1. Mission Overview

Details High Energy Cosmic Ray Nuclei Results on Ulysses: 1. Mission Overview High Energy Cosmic Ray Nuclei Results on Ulysses: 1. Mission Overview

Apr 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ssrv...72..391h&link_type=abstract

Space Science Reviews, Volume 72, Issue 1-2, pp. 391-396

Physics

11

Heliosphere, Solar Modulation, Ulysses

Scientific paper

The cosmic ray flux observed with the Kiel Electron Telescope on board the ULYSSES spaceprobe varies with solar activity as well as with heliospheric position. Determination of the latitudinal gradients requires a careful analysis of the influences of the current sheet tilt angle, the number of major solar flares, interplanetary shocks and interaction regions evolving in the expanding solar wind. In this paper we concentrate on nuclei with rigidity above 1 GV. We discuss the effects of the variable solar activity in the declining phase of the present solar cycle and the variation with radial distance as a basis for separating latitudinal effects. We show that during this phase of the solar cycle modulation of GV nuclei is ordered by temporal evolution, radial distance and negligible latitudinal effects even at latitudes between 30° and 50° South.

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