Ionospheric and magnetospheric modifications caused by VLF (very low frequency) waves. Scientific report

Technical Report · Fri Jun 01 04:00:00 EDT 1984

OSTI ID:6003398

Lee, M C; Kuo, S P

The ionosphere and the magnetosphere may be significantly modified by the injected VLF waves via the thermal filamentation instability and the excitation of lower hybrid waves. In VLF wave injection experiments performed, for example, at Siple, Antarctica, the ground-based transmitters are usually operated in a pulsed-wave mode with durations of a few seconds. These VLF wave pulses were used to study coherent wave-particle interactions in the magnetosphere such as the wave amplification, the triggering of wave emissions, the induced particle precipitation etc. (see e.g., Helliwell, 1983). It is shown that if the transmitters are operated continuously for a few minutes, significant ionospheric and magnetospheric disturbances can be caused by the following two processes. One is the thermal filamentation of the pump wave and the other one is the excitation of lower hybrid waves.

• Research Organization: Regis Coll., Weston, MA (USA)
• OSTI ID: 6003398
• Report Number(s): AD-A-148210/8/XAB
• Country of Publication: United States
• Language: English

Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
640203 -- Atmospheric Physics-- Magnetospheric Phenomena-- (-1987)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTARCTIC REGIONS
EARTH ATMOSPHERE
ELECTROMAGNETIC RADIATION
ENERGY-LEVEL TRANSITIONS
EXCITATION
F REGION
IONOSPHERE
LONG WAVE RADIATION
MAGNETOSPHERE
NOISE
PLANETARY IONOSPHERES
PLASMA WAVES
POLAR REGIONS
RADIATIONS
RADIO NOISE
RADIOWAVE RADIATION
WHISTLERS