Search Results - "Johnstone, A.D."

Pitch angle diffusion of low energy electrons and positive ions in the inner magnetosphere: A review of observations and theory by Johnstone, A.D

“…One of the most important loss processes of trapped particles in the outer radiation belts is pitch angle diffusion. A basic phenomenology was established more…”
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Statistical studies of energetic electrons in the outer radiation belt by Johnstone, A.D., Rodgers, D.J., Jones, G.H.

“…The medium electron A (MEA) instrument aboard the CRRES spacecraft provided data on terrestrial radiation belt electrons in the energy range from 153 to 1582…”
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Cometary ion pickup processes: Halley and Grigg-Skjellerup compared by Johnstone, A.D.

“…After Giotto's encounters with two comets of quite different gas production rates we attempt to compare the results to see:- 1. a) to what extent theories…”
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Solar wind control of spacecraft charging conditions in geostationary orbit during magnetic storms by Degtjarev, V.I., Popov, G.V., Johnstone, A.D.

“…Investigations of spacecraft charging at geostationary orbit reveal close relations between magnetospheric disturbances and electrostatic fields on spacecraft…”
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Low energy plasma analyzer by Hardy, D.A., Walton, D.M., Johnstone, A.D., Smith, M.F., Gough, M.P., Huber, A., Pantazis, J., Burkhardt, R.

“…The low energy plasma analyzer (LEPA) that operates in a direct wave-particle mode in which waves (below 30 kHz), measured by separate onboard electric field…”
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An investigation into the roles of ECH and whistler mode waves in the formation of “pancake” electron distributions using data from the CRRES satellite by Meredith, N.P., Johnstone, A.D., Szita, S., Horne, R.B., Anderson, R.R.

“…Electron pitch angle distributions sharply peaked at 90° pitch angle were first recorded in the energy range 50 eV < E < 500 eV by the GEOS-1 and GEOS-2…”
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Influence of geostationary spacecraft charging on measurements of low energy (0.05–20 keV) electron spectra by Popov, G.V, Degtjarev, V.I, Sheshukov, S.S, Johnstone, A.D

“…We find that the electron distributions measured from the Meteosat spacecraft in geosynchronous orbit have some characteristic spectral shapes associated with…”
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Suspected wave-particle interactions coincident with a pancake distribution as seen by the CRRES spacecraft by Watkins, N.W, Bather, J.A, Chapman, S.C, Mouikis, C.G, Gough, M.P, Wygant, J.R, Hardy, D.A, Collin, H.L, Johnstone, A.D, Anderson, R.R

“…On 1990 October 13 the Sussex Particle Correlator Experiment on the USAF/NASA Combined Release and Radiation Effects Satellite (CRRES) observed modulation in…”
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Evidence for Velocity Dispersion in Auroral Electrons by BRYANT, D. A, COLLIN, H. L, COURTIER, G. M, JOHNSTONE, A. D

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