Accession Number : ADP006324

Title :   Ionospheric Modification Experiments with Satellite-Borne and Ground-Based Transmitters,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE PLASMA FUSION CENTER

Personal Author(s) : Lee, M. C.

Report Date : 03 MAY 1990

Pagination or Media Count : 11

Abstract : A research program is outlined to investigate the nonlinear VLF propagation and interaction with ionospheric plasmas with the satellite-borne and ground-based transmitters. Coordinated space and ground-based ionospheric modification experiments have been planned to study nonlinear propagation and mode conversion of VLF waves into lower hybrid waves in the presence of HF heater created ionospheric irregularities. Space experiments with the mother (ACTIVE)-daughter (CZAK) satellites are also discussed to examine the excitation of parametric instability by powerful VLF waves. Proposed ground-based radar, optical, and VLF measurements can provide effective diagnoses of the induced ionospheric effects. It is expected that electron acceleration caused by the lower hybrid waves will produce intense airglow emissions. In addition, a broad height distribution of enhanced plasma lines is also expected for radars to detect.

Descriptors :   *IONOSPHERIC PROPAGATION, *IONOSPHERIC MODIFICATION, RADIO SIGNALS, VERY LOW FREQUENCY, AIRGLOW, ELECTRON DENSITY, PLASMAS(PHYSICS), RADIO LINKS, SURFACE TO SPACE.

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE