Results 201 to 210 of about 1,100 (241)

Intensity variations in outer Van Allen radiation belt

Journal of Geophysical Research, 1961
Using data from Explorer VII, the changes in the intensity of the outer Van Allen radiation belt were investigated in detail over the period October 26, 1959, to December 9, 1959. To relate the intensities to location in the belt, the parameter L was used.
D. Venkatesan, Scott E. Forbush, Carl E. McIlwain   +2 more
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Charged particles in the inner Van Allen radiation belt

Journal of Geophysical Research, 1961
A nuclear emulsion stack was flown through the lower part of the inner Van Allen radiation belt a few days after the intense solar flares of July 10 to 16, 1959. The stack looked out through a thin window on the mounting plate at the rear of the nose cone. Protons with incident energies down to 42 Mev were recorded.
H. H. Heckman, F. B. Harrison, L. Rosen, A. H. Armstrong   +3 more
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An impenetrable barrier to ultrarelativistic electrons in the Van Allen radiation belts

Nature, 2014
Early observations indicated that the Earth's Van Allen radiation belts could be separated into an inner zone dominated by high-energy protons and an outer zone dominated by high-energy electrons. Subsequent studies showed that electrons of moderate energy (less than about one megaelectronvolt) often populate both zones, with a deep 'slot' region ...
J. F. Fennell, Wen Li, Richard M. Thorne, John Wygant, Louis J. Lanzerotti, Andrew J. Gerrard, William S. Kurth, Qianli Ma, Allison Jaynes, Daniel N. Baker, Quintin Schiller, David M. Malaspina, Shrikanth Kanekal, V. Hoxie, John C. Foster, Lauren Blum, Philip J. Erickson, Xinlin Li   +17 more
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Ring currents in the region of the Van Allen radiation belts

Journal of Geophysical Research, 1961
By measurements of the earth's magnetic field in the region of the Van Allen radiation belts clear differences between the calculated dipole field and the observed values were found. During the flight of the cosmic rocket Mechta (2/1/1959) an anomaly of the magnetic field at a geocentric distance of about 21,000 km was discovered [Dolginow and Puschkow,
R. Fiebig, H. Voelcker
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Maximum total energy of the Van Allen radiation belt

Journal of Geophysical Research, 1960
It is the purpose of this letter to point out that the results of the spherical harmonic analysis of the geomagnetic field place an upper limit on the energy that can be stored in the Van Allen radiation belt. It will be shown that conservative figures indicate a maximum energy in trapped radiation of 6×1015 joules.
A. J. Dessler, E. H. Vestine
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The Savage Radiation of the Van Allen Belts Is Homegrown

Science, 2013
The solution to a decades-old space mystery may help save satellites from deadly radiation.
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Source of High-Energy Protons in the Van Allen Radiation Belt

Physical Review Letters, 1970
Proton distribution in radiation belt inner zone from radial diffusion addition to cosmic ray produced albedo-neutron decay and atmospheric collision ...
Thomas A. Farley, Martin Walt, A. D. Tomassian   +2 more
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Relationship of the Van Allen radiation belts to solar wind drivers

Journal of Atmospheric and Solar-Terrestrial Physics, 2008
Abstract Discovery of the Van Allen radiation belts by instrumentation flown on Explorer 1 in 1958 was the first major discovery of the Space Age. A view of the belts as distinct inner and outer zones of energetic particles with different sources was modified by observations made during the Cycle 22 maximum in solar activity in 1989–1991, the first ...
Jordan A. Zastrow, Brian Kress, Hans-R. Mueller, Mary K. Hudson, J. Bernard Blake   +4 more
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Radio frequency synchrotron radiation from the Van Allen belts

Journal of Geophysical Research, 1967
Consider the case of Figure 1 in which an observer in space observes the earth at radio frequencies. In particular, consider the radio brightness distribution in one dimension; i.e. let the observer look at the earth such that he looks in the equatorial plane of the centered dipole model for the geomagnetic field.
A. M. Peterson, J. F. Vesecky
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On the possibility of detecting synchrotron radiation from electrons in the Van Allen belts

Journal of Geophysical Research, 1959
It is known that a moving charged particle can be trapped in the earth's magnetic field indefinitely. Indeed, high-speed charged particles, presumably electrons, have recently been observed in nature by United States satellites and lunar probes. These electrons are relativistic and should emit radiofrequency wide-band noise similar to that observed in ...
M. P. Nakada, R. B. Dyce
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