Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsa31c..04m&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SA31C-04
Physics
[0654] Electromagnetics / Plasmas, [2403] Ionosphere / Active Experiments, [2487] Ionosphere / Wave Propagation, [6929] Radio Science / Ionospheric Physics
Scientific paper
The University of Florida (UF) conducts D-Region modification experiments using the High Frequency Active Auroral Research Program (HAARP) HF transmitter in Gakona, Alaska. Over the last three years, UF research efforts at HAARP have focused on three areas of interest: 1) the generation of electromagnetic waves in the 1-5~kHz band (i.e., ELF/VLF wave generation), 2) the nonlinear heating effects that produce HF cross-modulation, and 3) the scattering, produced by HAARP heating of the lower ionosphere, of sub-ionospherically propagating VLF waves ( ˜20--30~kHz). Together, the experiments to be discussed provide a framework to advance the understanding of D-region absorption processes, with the overall goal to produce a validated D-region absorption model. In this paper, we provide a summary of our overall experiment goals and describe our progress toward these goals, supported by experimental results that will be compared with the predictions of a theoretical model. We will discuss, for instance, progress in predicting the effects of so-called dual-beam heating during ELF/VLF wave generation experiments. Furthermore, a time-of-arrival method will be employed to identify the location of the dominant ELF/VLF source region, and it will be additionally demonstrated that the method may be used to distinguish between multiple ionospheric reflection paths. Experimental observations during pulsed-heating cross-modulation experiments will be used to identify the relative change in D-region absorption as a function of altitude. Lastly, we will describe our most recent VLF scattering observations, and demonstrate the technique with which we intend to interpret the observations so that they may be compared with our other experimental results. Together, these experimental observations provide a unique context within which to interpret the absorption of high-power radio waves within the D-region ionosphere.
No associations
LandOfFree
D-Region Modification at HAARP: An Overview of Recent Experimental Results Obtained by the University of Florida (Invited) 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 D-Region Modification at HAARP: An Overview of Recent Experimental Results Obtained by the University of Florida (Invited), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and D-Region Modification at HAARP: An Overview of Recent Experimental Results Obtained by the University of Florida (Invited) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1504446