Galactic Cosmic Ray Intensity 0.99 to 5.26 A.U. from the Sun.
Abstract
The intensity of galactic cosmic radiation in interplanetary space has been observed over the heliocentric radial range 0.99 less than r less than 5.26 a.u. with five Geiger-Mueller tubes on the Jupiter-bound spacecraft Pioneer 10 and over the range 1.00 less than r less than 3.59 a.u. with three similar tubes on Pioneer 11, also bound for Jupiter. The observations span the time period 1972 March 3 to 1974 April 29, near the epoch of minimum solar activity. The contributions of solar energetic particles are eliminated.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1975
- Accession Number
- ADA014613
Entities
People
- James A. van Allen
- Michelle F. Thomsen
Organizations
- University of Iowa