Results 121 to 130 of about 3,931 (155)

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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Aeronomic effects of the South Atlantic Anomaly

Reviews of Geophysics, 1976
Experimental and theoretical values for precipitated electron and proton fluxes in the area of the South Atlantic geomagnetic anomaly are reviewed. Observations of airglow which have been reported in the literature suggest that there is no enhancement in the Brazilian region, though there may be some in the southeastern part of the Atlantic area. There
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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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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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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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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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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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Magnetic anomalies in the South Atlantic and ocean floor spreading

Journal of Geophysical Research, 1968
Magnetic profiles across the South Atlantic Ocean from the Rio Grande rise and Argentine basin to the southwest coast of Africa and between 25° and 50°S are presented. Anomalies have been correlated from profile to profile, and the resulting magnetic pattern is parallel to and symmetric about the axis of the mid-Atlantic ridge.
G. O. Dickson, W. C. Pitman, J. R. Heirtzler   +2 more
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Radiation belts in the region of the South-Atlantic magnetic anomaly

Space Science Reviews, 1967
The difference of the geomagnetic field from the field of the idealized dipole not only creates certain difficulties for studying the geomagnetically trapped radiation but also presents new possibilities for studying the processes which control the particle movement in the magnetosphere. It will be remembered that the fact that the geomagnetic field is
S.N. Vernov, E.V. Gorchakov, P.I. Shavrin, K.N. Sharvina   +3 more
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