Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm22a..04w&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM22A-04
Physics
[2431] Ionosphere / Ionosphere/Magnetosphere Interactions, [2752] Magnetospheric Physics / Mhd Waves And Instabilities
Scientific paper
The detection of ULF waves at ionospheric heights reveal some features of the solar - terrestrial connection. The ionospheric perturbations are detected using the Doppler shift obtained from HF radars as a variation in the Doppler velocity. We have analysed Bruny Island SuperDARN radar data and ground magnetometer data located on Macquarie Island over 2006-2009 year period. The temporal, spatial and spectral variation of ULF wave occurrence and properties have been investigated using a 3-year statistical data analysis. We find a consistent, low frequency band with frequency around 2 mHz and independent of latitude. A second population exists around 8 mHz. Using the ray-tracing signal method the ionospheric and ground backscatter populations have been determined. The backscatter ranges are compared with an empirical model for plasmapause location. These results will be discussed in terms of present understanding of ULF generation and propagation models.
Norouzi Sedeh L.
Waters Colin L.
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