HR: 1340h
AN: SA23A-0301 [Abstracts]
TI: Results from UHF and HF Radar Studies of Ionospheric Interaction Experiments at HAARP
AU: * Sheerin, J P
EM: jsheerin@emich.edu
AF: Eastern Michigan Univ., Physics and Astronomy, Ypsilanti, MI 48197
United States
AU: Ilie, R
EM: rilie@umich.edu
AF: Eastern Michigan Univ., Physics and Astronomy, Ypsilanti, MI 48197
United States
AU: Roesler, E L
EM: eroesler@emich.edu
AF: Eastern Michigan Univ., Physics and Astronomy, Ypsilanti, MI 48197
United States
AU: Bristow, W A
EM: Bill.Bristow@gi.alaska.edu
AF: U. Alaska-Fairbanks, Geophysical Inst., Fairbanks, AK 99775
United States
AU: Watkins, B J
EM: bjw4072@mailblocks.com
AF: U. Alaska-Fairbanks, Geophysical Inst., Fairbanks, AK 99775
United States
AU: Oyama, S
EM: soyama@gi.alaska.edu
AF: U. Alaska-Fairbanks, Geophysical Inst., Fairbanks, AK 99775
United States
AB:
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).
DE: 6944 Nonlinear phenomena (4400, 7839)
DE: 7863 Turbulence (4490)
SC: SPA-Aeronomy [SA]
MN: Fall Meeting 2005