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temporal evolution of HF‐enhanced plasma lines
Author(s) -
Kuo S. P.,
Ho A. Y.,
Lee M. C.
Publication year - 1990
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/gl017i012p02209
Subject(s) - radar , plasma , physics , backscatter (email) , wavenumber , computational physics , overshoot (microwave communication) , altitude (triangle) , geology , optics , telecommunications , mathematics , geometry , quantum mechanics , computer science , wireless
The temporal evolution of HF‐enhanced plasma lines (HFPLs) is investigated theoretically. The HFPLs refer to the radar echoes at frequencies near the sum and difference of the radar frequency and the HF heater wave frequency. These enhanced spectral lines are caused by backscatter of radar signals from plasma waves having a wavenumber of 18 m −1 . A nonlinear theory has been developed to explain both the intensity overshoot and altitude expansion of HFPLs observed at Arecibo, Puerto Rico [Djuth and Sulzer, 1989] with good agreement.