Interplanetary cosmic ray intensity: 1972-1984 and out to 32 AU

Details Interplanetary cosmic ray intensity: 1972-1984 and out to 32 AU Interplanetary cosmic ray intensity: 1972-1984 and out to 32 AU

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iowa.reptq....v&link_type=abstract

Progress Report Iowa Univ., Iowa City. Dept. of Physics and Astronomy.

Astronomy and Astrophysics

Astronomy

Cosmic Rays, Intensity, Interplanetary Space, Cycles, Data Acquisition, Geiger Counters, Kinetic Energy, Protons, Radioisotope Batteries, Saturn (Planet), Solar Activity, Thermoelectric Generators

Scientific paper

Using a number of Geiger-Mueller tubes in the University of Iowa instruments on Pioneer 10 and Pioneer 11, we have measured the interplanetary intensity of cosmic rays EP > 80 meV) over a complete solar activity cycle and out to a helicocentric distance of over 32 AU. Free space values of the background corrections due to the radioisotope thermal generators were determined during passage of Pioneer 11 under the dense rings of Saturn during the 1 September 1979 encounter. These improved corrections and ones inferred therefrom for Pioneer 10 have supplanted earlier estimates and have been applied to all data.

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