Electron precipitation in the vicinity of a VLF transmitter

Journal Article · Fri May 01 04:00:00 EDT 1987 · Journal of Geophysical Research; (United States)

DOI:https://doi.org/10.1029/JA092iA05p04525· OSTI ID:5398784

Vampola, A L ^[1]

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1. Aerospace Corp., Los Angeles, CA (United States)

Using high-resolution pitch angle measurements made by a magnetic focusing electron spectrometer on the S3-3 satellite, angular distributions of 235-keV electrons precipitated in the slot region of the magnetosphere by a ground-based VLF transmitter are compared with the pitch angle distributions that would be produced by various patterns of longitudinal interaction regions.The observed electrons are in the drift loss cone, necessitating the use of a trace-back-to-longitude-of-origin technique coupled with a two-dimensional convolution program describing the response of the electron spectrometer. The data are well fit both with theoretical calculations of ionospheric field intensity patterns above a transmitter and with a similar pattern of received field intensities measured along a traverse in the conjugate region. The agreement between the data dna field patterns implies a linear or quasi-linear wave-particle interaction. The energy-frequency relationship between the electrons and the waves implies an interaction region low on the magnetic field line rather than near the equator, as has been determined for similar precipitations in the inner zone.

• OSTI ID: 5398784
• Journal Information: Journal of Geophysical Research; (United States), Journal Name: Journal of Geophysical Research; (United States) Vol. 92:A5; ISSN 0148-0227; ISSN JGREA
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANGULAR DISTRIBUTION
CHARGED-PARTICLE PRECIPITATION
COMPARATIVE EVALUATIONS
DISTRIBUTION
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTROMAGNETIC RADIATION
ELECTRON PRECIPITATION
ELECTRON SPECTROMETERS
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
IONOSPHERE
LOSS CONE
MEASURING INSTRUMENTS
ORIGIN
PLANETARY IONOSPHERES
QUASILINEAR PROBLEMS
RADIATIONS
RADIO EQUIPMENT
RADIOWAVE RADIATION
SATELLITES
SPECTROMETERS