Results 271 to 280 of about 401,503 (306)

Positron-electron ratio of precipitating electrons

Journal of Geophysical Research, 1964
A balloon observation of the X-ray spectrum from 37 to 700 kev over Minneapolis during the July 1961 solar event series has allowed an upper limit to be placed on the ratio of positrons to electrons during a precipitation as well as on other geophysical processes.
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Transmission Electron Microscopy and Nano‐Precipitation

Advanced Engineering Materials, 2006
AbstractWe have presented here a rapid survey of some of the stringent results obtained by TEM and associated techniques in the precipitation studies conducted during the CPR ‘Précipitation'. It clearly appears that TEM plays an irreplaceable role in the link between the understanding of the structure and chemistry of small precipitates and the ...
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Precipitation of electrons after geomagnetic substorms

Studia Geophysica et Geodaetica, 1988
Precipitating electrons Ee>10 keV and Ee>30 keV and protons Ep=150 to 300 keV are analyzed using data obtained from the low-altitude polar-orbiting satellite Interkozmos-17 after the magnetic storm of December 2, 1977. On December 3, an isolated substrom occurred, and strong electron precipitation was observed in the midnigt sector, while the sequence ...
Yu. V. Gotselyuk, M. S. Kazaryan, S. N. Kuznetsov, Karel Kudela, Ivan Kimák   +4 more
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Patterns of magnetospheric electron precipitation

Journal of Atmospheric and Terrestrial Physics, 1967
Using an idealised magnetospheric-ionospheric circuit between conjugate points, a determination has been made of the relative, world-wide precipitation of magnetospheric electrons into the lower, denser atmosphere. The precipitation considered is that due to the superposition of a longitudinal electric field along the direction of the magnetic field ...
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ELF emissions and relativistic electron precipitation

Journal of Geophysical Research: Space Physics, 1984
Simultaneous measurement of ELF emissions and bremsstrahlung X rays were made by using a balloon borne experiment flow from Fairbanks, Alaska, on September 30, 1976. Several intense auroral X ray bursts of 2–3 minute duration were detected that have been interpreted to be the result of relativistic electron precipitation (REP).
R. H. West, G. K. Parks
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Measurements of inner zone electron precipitation

Journal of Geophysical Research: Space Physics, 1980
Energetic electron (≳0.16 MeV) data taken from November 1972 to April 1973 from over 1000 passes of a low‐altitude (∼750 km) noon‐midnight polar‐orbiting satellite across the L=1.75 field line in both the northern and southern hemispheres have been analyzed for evidence of the longitude and local time distributions in electron precipitation on that ...
W.L. Imhof, J.B. Reagan, E.E. Gaines
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Electron precipitations and polar auroras

Space Science Reviews, 1978
In the first part (Sections I–III) a brief historical review of the progress of our knowledge of the precipitation of auroral electrons is given. Observations by different techniques, in terms of detectors aboard balloons, sounding rockets, and polar-orbiting satellites, are reviewed (Sections I).
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Electron precipitation patterns and substorm morphology

Journal of Geophysical Research, 1973
Patterns of the precipitation of low energy electrons observed by polar satellites were examined as functions of substorm phase. Precipitation boundaries are generally identifiable at the low latitude edge of polar cusp electron precipitation and at the poleward edge of precipitation in the premidnight sector.
R. A. Hoffman, J. L. Burch
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Precipitation of accelerated electrons at Mars

2023
Accelerated electron populations observed in the nightside ionosphere of Mars are investigated using measurements obtained by MAVEN’s Solar Wind Electron Analyzer. The measurements are of particular interest as they extend to altitudes as low as 130 km and to regions characterized by strong crustal magnetic fields, allowing us to investigate ...
Hassanali Akbari, Christopher Fowler, Laila Andersson   +2 more
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Mechanisms for Intense Relativistic Electron Precipitation

1980
From an indepth analysis of over fourteen months of data from the S3-3 satellite, 313 relativistic electron precipitation events have been detected with essentially isotropic flux over the upward looking hemisphere. The majority of events occur at night in a narrow latitudinal zone embedded within a broader region of intense energetic ion precipitation.
Richard M. Thorne, Leo J. Andreoli
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