Outer-zone electron precipitation produced by a vlf transmitter. Technical report

Technical Report · Tue Mar 01 04:00:00 EST 1988

OSTI ID:7023507

Vampola, A L; Adams, C D

Using high-resolution pitch-angle measurements made by a magnetic-focusing electron spectrometer on the S3-3 satellite while in the drift-loss-cone region of the magnetosphere, characteristics of fluxes of 108 to 654-keV electrons precipitated in the inner zone, in the slot region, and in the outer zone of the magnetosphere are all shown to be consistent with the precipitation having been produced by the same ground-based VLF transmitter, UMS. Pitch angle measurements are used to locate the longitude of precipitation. The temporal pattern of transmitter operation obtained from synoptic data from a ground-based VLF receiver is used along with drift-rate calculations to predict the electron energies as a function of L-shell which should be observable by the S3-3 instrument. The predicted energy response is then compared with the in-situ observations, getting complete agreement. Finally, wave-particle resonance calculations are made for each of the three regions. The study indicates that ground-based VLF transmitters, which have previously been shown to produce precipitation in the inner zone and slot regions, are almost certainly instrumental in precipitating electrons in the outer zone also.

• Research Organization: Aerospace Corp., El Segundo, CA (USA). Space Sciences Lab.
• OSTI ID: 7023507
• Report Number(s): AD-A-191944/8/XAB; TR-0086A(2940-05)-2
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED-PARTICLE PRECIPITATION
DOCUMENT TYPES
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTRON PRECIPITATION
ELECTRON SPECTROSCOPY
ELECTRONS
ELEMENTARY PARTICLES
FERMIONS
FOCUSING
GROUND LEVEL
LEPTONS
LEVELS
LOSSES
MAGNETIC FIELDS
OPERATION
PARTICLES
PROGRESS REPORT
RESONANCE
SPECTROSCOPY