Theoretical model for the temporal evolution of HF-enhanced plasma lines

Technical Report · Thu May 31 04:00:00 EDT 1990

OSTI ID:7275624

Kuo, S P; Ho, A Y; Lee, M C; Djuth, F T

The HF-enhanced plasma lines (HFPLs) observed in the Arecibo heating experiments refer to the radar returns at frequencies near the sum and difference of the radar frequency and the HF-heater frequency. These enhanced spectral lines are caused by backscatter of radar signals from parametrically excited plasma waves having a wavenumber of 18m-l. A nonlinear theory has been developed to describe the temporal evolution of those specified plasma waves and their originating altitude interval. Both phenomena of intensity overshoot and expansion of originating altitude interval of HFPLs observed at Arecibo, Puerto Rico are explained. The theoretical results agree well with the observation Djuth and Sulzer, 1989.

• Research Organization: Polytechnic Univ., Farmingdale, NY (United States). Weber Research Inst.
• OSTI ID: 7275624
• Report Number(s): AD-P-006501/1/XAB; CNN: AFOSR-88-0127; AFOSR-85-0316
• Country of Publication: United States
• Language: English

Related Subjects

661320* -- Auroral
Ionospheric
& Magnetospheric Phenomena-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
DISTURBANCES
EARTH ATMOSPHERE
ENERGY TRANSFER
HEATING
HIGH-FREQUENCY HEATING
IONOSPHERE
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NONLINEAR PROBLEMS
PLANETARY IONOSPHERES
PLASMA HEATING
PLASMA WAVES
RADAR
RANGE FINDERS
TIME DEPENDENCE