Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence

Details Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....9615985f&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Sept. 1, 1991, p. 15,985-16,008. Research supported by Aerospace Corp

Mathematics

Logic

48

Atmospheric Turbulence, Backscattering, Earth Ionosphere, Electrostatic Waves, Radar Scattering, High Frequencies, Meteorological Radar, Periodic Variations, Plasma Density, Ultrahigh Frequencies

Scientific paper

Results are presented of observations of the spectrum of the 430-MHz radar backscatter from HF-induced Langmuir turbulence with height discrimination. During very stable ionospheric conditions under which the height of the below-threshold backscatter spectrum changed by less than 300 m during a 7-min period, a 20-s-long temporary increase in the HF power from 3 MW ERP to 38-MW-equivalent-radiated HF power is found to result in subsequent strong above-threshold spectra extending to heights up to 1200 m greater than the height of the below-threshold spectrum for more than a minute. The generation of irregularities in the plasma density during the 20 s of enhanced HF power is suggested as a possible cause of this persistence of strong above-threshold spectra at greater heights. The initial temporal evolution of the backscatter spectrum from Langmuir turbulence after the start of HF transmissions is observed for different heights. The observational results are compared with the predictions of existing theories of Langmuir turbulence.

Affiliated with

Also associated with

No associations

Rating

Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Height dependence of the observed spectrum of radar backscatter from HF-induced ionospheric Langmuir turbulence will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1340933