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Radiation Around the Earth to a Radial Distance of 107,400 km.
Radiation detectors and the radio-telemetry system for Pioneer III observations of the Earth's radiation belt are described. Information is given on the vehicle and its trajectory, and logs of flight…
Sources and Sinks of Energetic Electrons and Protons in Saturn's Magnetosphere
- J. Allen, B. A. Randall, M. Thomsen
- Physics
- 1 November 1980
This paper reports the results of continuing analysis and interpretation of energetic particle observations obtained by the University of Iowa instrument on Pioneer 11 during traversal of Saturn's…
The geomagnetically trapped corpuscular radiation
- J. Allen
- Geology
- 1 November 1959
Introduction—One of the most interesting geophysical discoveries of recent years was that made with the early United States satellites Explorer I (satellite 1958α) and Explorer III (satellite 1958γ).…
Absorption of energetic protons by Saturn's ring g. Progress report for FY83
- J. Allen
- Physics
- 1 March 1983
In a preliminary paper on Pioneer 11 observations of energetic particles in Saturn's inner magnetosphere, Van Allen et al. 1980a reported a distinctive absorption feature at a radial distance r…
Radiation observations with satellite 1958 ε
- J. Allen, C. Mcilwain, G. Ludwig
- Physics, Geology
- 1 March 1959
A preliminary account is given of the radiation observations made with Satellite 1958e. The earlier discovery of the great radiation belt around the earth with Satellites 1958α and 1958γ has been…
On the modulation of galactic cosmic ray intensity during solar activity cycles 19, 20, 21, 22 and early 23
- J. Allen
- Physics
- 15 August 2000
Cross-plots of annual mean sunspot number against the annual mean intensity of galactic cosmic rays for the period 1953–1999 show a striking difference between such modulation loops for solar…
Radiation Measurements to 658,300 Km. with Pioneer IV
The flight of deep-space probe Pioneer IV is described, and radiation observations obtained are reported and discussed in comparison with Pioneer II and the first Soviet cosmic rocket results. In…
Recovery of interplanetary cosmic ray intensity following the Great Forbush Decrease of mid-1991
- J. Allen
- Physics
- 23 December 1993
There was a succession of major solar flares in late-May to mid-June 1991. Their effects on cosmic ray intensity were observed by six spacecraft at various points in the heliosphere and by…
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