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Observations of double-peaked E region coherent spectra with the CUTLASS Finland HF radar

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journal contribution
posted on 2012-10-24, 09:05 authored by D. W. Danskin, A. V. Koustov, R. A. Makarevitch, M. Lester
Cooperative UK Twin Located Auroral Sounding System Finland HF radar observations of E region coherent spectra are presented for several events. The Burg spectrum method is applied to study microstructure of the spectra. It is discovered that many spectra are two-peaked, and quite often there is a systematic pattern in their occurrence; the double-peak echoes are typically observed at intermediate and far ranges of the E region echo band and at ranges farther than the power maximum in the range profile. The typical separation between the peaks is about 150 m/s and hardly changes with the azimuth of observations. Velocities of two components in a double-peak spectrum are typically larger and smaller than the velocity of the unresolved spectrum and single-peaked velocity of echoes at shorter ranges. It is hypothesized that the two components of the echoes occur because of signal reception from the top and bottom of the electrojet layer.

Funding

CUTLASS Finland radar is supported by PPARC, the Swedish Institute for Space Physics, Uppsala, and the Finnish Meteorological Institute. This research was supported by NSERC (Canada) grant to A.V.K.

History

Citation

Radio Science, 2004, 39 (2)

Published in

Radio Science

Publisher

American Geophysical Union (AGU), Wiley, International Union of Radio Science

issn

0048-6604

eissn

1944-799X

Available date

2012-10-24

Publisher version

http://onlinelibrary.wiley.com/doi/10.1029/2003RS002932/abstract

Language

English