Results 211 to 220 of about 3,859 (245)

Spatial shift of the South Atlantic Anomaly

Journal of Geophysical Research, 1977
From analysis of the background measured by the EUV spectrometer aboard the German-U.S. satellites Aeros A and B the spatial distribution of unidentified particle fluxes received east of the South American coast could be established. From January 1973 through August 1974, in the height range 700–800 km the center of the configuration (near 30°S, 40°W ...
Gerhard Knoll, Klaus Holzer, Gerhard Schmidtke   +2 more
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Airglow and the South Atlantic Geomagnetic Anomaly

Journal of Geophysical Research, 1961
Dessler [1959] suggested why the Capetown anomaly of the geomagnetic field should explain the ‘slot’ between the inner and outer zones of trapped radiation. For present considerations this anomaly is regarded as a part of the large negative anomaly (here called the South Atlantic anomaly) which extends from the South China Sea southeast across Brazil ...
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Evidence of nonfission electrons in the South Atlantic Anomaly

Journal of Geophysical Research, 1968
Nonfission electron evidence in South Atlantic anomaly determined by flux energy spectra of trapped particles measured on manned Gemini 12 ...
James R. Marbach, Carlos S. Warren, Reed S. Lindsey   +2 more
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South Atlantic anomaly and CubeSat design considerations

SPIE Proceedings, 2015
Effects of the South Atlantic Anomaly (SAA) on spacecraft in low Earth orbit (LEO) are well known and documented. The SAA exposes spacecraft in LEO to high dose of ionizing radiation as well as higher than normal rates of Single Event Upsets (SEU) and Single Event Latch-ups (SEL).
Judy A. Fennelly, William R. Johnston, Daniel M. Ober, Gordon R. Wilson, T. Paul O'Brien, Stuart L. Huston   +5 more
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Radiation fields specific to the South Atlantic Anomaly

International Journal of Radiation Applications and Instrumentation. Part D. Nuclear Tracks and Radiation Measurements, 1992
Abstract This paper contains the description of the spatial and temporal behavior of the radiation field inside the “MIR” space station during its crossing of the South Atlantic Anomaly (SAA) Region. It is shown that, even within the same area of the SAA, variations of the dose rate amplitude can exceed normal statistical fluctuations.
V.V. Benghin, N.A. Panova, V.M. Petrov, V.A. Shurshakov   +3 more
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Particle precipitation in the south atlantic geomagnetic anomaly

Planetary and Space Science, 1975
A simple model of the motion of charged particles in the closed-field-line magnetic field for L less than about 4.5 is used together with Injun 3 measurements of 40-keV precipitated electrons made in the northern hemisphere to estimate theoretically the extent of electron precipitation, the energy input, and the 3914-A airglow in the South Atlantic ...
D.G. Torr, Marsha R. Torr, James C.G. Walker, R.A. Hoffman   +3 more
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Magnetic Anomalies and Seafloor Spreading Rates in the Northern South Atlantic

Nature, 1970
A geomagnetic profile across the northern South Atlantic yields spreading rates for the last 70 m.y. which vary from 1.6 to 2.0 cm/year. There is evidence for three regional discontinuities in the spreading history of the South Atlantic.
T H, van Andel, T C, Moore
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South Atlantic anomaly filter for satellite UV observation

SPIE Proceedings, 2011
A South Atlantic Anomaly (SAA) filter has been developed to filter out large amounts of noise caused by high energy protons hitting onto the optical instrument focal plane when the satellite passes through the SAA region. The filter is based on the Principal Component Analysis (PCA)/Empirical Orthogonal Function (EOF) analysis.
Jianguo Niu, Lawrence E. Flynn
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Amplitude enhancement of events in the South Atlantic anomaly region

Journal of Atmospheric and Solar-Terrestrial Physics, 2005
Abstract South Atlantic Magnetic Anomaly (SAMA) due to its weak total geomagnetic field F is known to be a sink of trapped charged particles from the inner radiation belt during both magnetically quiet and disturbed periods. Ionosondes, riometers, and VLF radio propagation monitoring experiments have shown ionospheric effects due to increase of
N.B. Trivedi, M.A. Abdu, B.M. Pathan, S.L.G. Dutra, N.J. Schuch, J.C. Santos, L.M. Barreto   +6 more
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The South Atlantic Magnetic Anomaly: three decades of research

Journal of Atmospheric and Terrestrial Physics, 1992
Abstract This brief review of advances in our understanding of some physical processes related to the South Atlantic Magnetic Anomaly (SAMA) is intended to highlight specific issues on which further research is needed. The discussion focuses on the origin of the SAMA, the geomagnetic storm-related effects and the impact of the SAMA on orbiting ...
O. Pinto, W.D. Gonzalez, I.R.C.A. Pinto, A.L.C. Gonzalez, O. Mendes   +4 more
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