Results from UHF and HF Radar Studies of Ionospheric Interaction Experiments at HAARP

Details Results from UHF and HF Radar Studies of Ionospheric Interaction Experiments at HAARP Results from UHF and HF Radar Studies of Ionospheric Interaction Experiments at HAARP

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa23a0301s&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SA23A-0301

Other

6944 Nonlinear Phenomena (4400, 7839), 7863 Turbulence (4490)

Scientific paper

High power HF radiowave experiments have begun at the HAARP Ionospheric Research Observatory in Gakona, Alaska. The SuperDARN HF radar station in Kodiak, Alaska is now routinely employed to monitor HF backscatter from irregularities formed in the interaction volume over HAARP. A 16-panel prototype of a new UHF incoherent scatter radar facility, AMISR, has recently become operational on the HAARP site. Complementary to these radar probe diagnostics are new stimulated electromagnetic emissions (SEE) receivers which record the electromagnetic emissions that propagate to the ground. We report on series of experiments performed at HAARP which employ all of the new radar and SEE diagnostics. Employing HF pump pulses of varying lengths (from milliseconds to tens of seconds), we are able to reproduce, analyze, and compare prompt temporal and spectral signatures of Strong Langmuir Turbulence (SLT) measured by the HAARP AMISR UHF radar. The Kodiak HF radar measured the evolution of irregularities which may be compared with features in the UHF backscatter. These results are compared to measurements of SLT previously performed at other HF heating facilities. Duncan, L. M., and J. P. Sheerin, J. Geophys. Res., 90 (A9), 8371 (1985).

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