E-region bifurcation and magnetic field related Bragg backscattered spectral events observed at high-latitude by MF radar
| dc.contributor.author | Morris, Ray James | en |
| dc.contributor.author | Holdsworth, David Andrew | en |
| dc.contributor.author | Murphy, Damian J. | en |
| dc.contributor.author | Monselesan, D. M. | en |
| dc.contributor.school | School of Chemistry and Physics : Physics and Mathematical Physics | en |
| dc.date.issued | 2005 | en |
| dc.description.abstract | We report on novel spectral characteristics of E-region backscatter acquired using a 1.94 MHz Medium Frequency (MF) radar above the high-latitude Antarctic station Davis (68.6°S). Two distinctive Doppler spectra are observed: one that exhibits bifurcation in Doppler velocity (or frequency) with one, or occasionally more, near symmetrical spectral side-bands (here labelled SSE); and a second that exhibits broad-band spectra related to the magnetic field topology (here labelled FRE). Both spectral forms reveal a characteristic quasi-hyperbolic spectral form that diverges in Doppler velocity with range. We discuss the properties of these two spectral forms including: Doppler spectral shape; power spectra; angle-of-arrival (AOA) of backscattered sources; and their diurnal and day-to-day occurrence distributions for our campaign interval. Interestingly, the E-region SSE observed at a height near 100 km were observed coincidentally with D-region polar mesosphere summer echoes (PMSE) in the height range 82–92 km, when colocated data were available. | en |
| dc.description.statementofresponsibility | R. J. Morris, D. A. Holdsworth, D. J. Murphy and D. M. Monselesan | en |
| dc.identifier.citation | Geophysical Research Letters, 2005; 32(23):23814-23814 | en |
| dc.identifier.doi | 10.1029/2005GL024429 | en |
| dc.identifier.issn | 0094-8276 | en |
| dc.identifier.uri | http://hdl.handle.net/2440/55965 | |
| dc.language.iso | en | en |
| dc.publisher | American Geophysical Union | en |
| dc.title | E-region bifurcation and magnetic field related Bragg backscattered spectral events observed at high-latitude by MF radar | en |
| dc.type | Journal article | en |