Physics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995jatp...57..169k&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 57, no. 2, p. 169-176
Physics
Auroras, Backscattering, Boundaries, Comparison, Earth Ionosphere, Edge Detection, Irregularities, Scintillation, Ionograms, Mapping, Navigation Satellites, Radar Measurement
Scientific paper
A study is described of the equatorwards boundary of high-latitude ionospheric irregularities using measurements obtained by two different experimental techniques. Auroral traces observed on backscatter ionograms from an HF radar have been used to identify the boundary of the decameter scale-size irregularities responsible for the coherent backscatter. Simultaneous observations of scintillation on the 150 MHz signals from Navy Navigation Satellite System (NNSS) satellites have enabled the boundary for irregularities in the sub-kilometer scale regime to be located. Comparisons of the results from the two techniques indicate that reconciliation between boundary positions can be made in only about 50% of the cases considered. In general the scintillation boundary lies on average well polewards of that identified by the HF radar, suggesting that caution should be exercised in the mapping of irregularity boundary positions.
Bradley Paul Andrew
Kersley L.
Pryse S. E.
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