Splitting of the Doppler frequency shift of bi-static backscatter signals during the Sura experiments |
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| Authors: | T. D. Borisova N. F. Blagoveshchenskaya V. A. Kornienko V. L. Frolov G. G. Vertogradov V. G. Vertogradov |
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| Affiliation: | (1) Arctic and Antarctic Research Institute, Russian Academy of Sciences (AANII), ul. Beringa 38, St. Petersburg, 199397, Russia;(2) Radiophysical Research Institute, Bol’shaya Pecherskaya ul. 25, GSP-51, Nizhni Novgorod, 603600, Russia;(3) Rostov State University, Rostov-on-Don, Russia |
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| Abstract: | The experimental studies of the specific behavior of small-scale artificial ionospheric irregularities at midlatitudes, performed using the Sura HF heating facility, are analyzed. The observations were performed in September 2006, using the method of bi-static backscatter by artificial ionospheric irregularities on the Armavir-Sura-St. Petersburg and Samara-Sura-Rostov-on-Don diagnostic paths. It has been detected that the Doppler frequency shift of scattered signals at 3–7 Hz was split on the Armavir-Sura-St. Petersburg path from 1500 to 1600 UT on September 6, 2006. The simultaneous measurements on the Samara-Sura-Rostov-on-Don path indicated that only one signal of bi-static backscatter was present. An analysis of the experimental data, performed using the numerical simulation results, indicated that the ordinary and extraordinary polarization modes of bi-static backscatter signals could be simultaneously observed on September 6, 2006, on the Armavir-Sura-St. Petersburg path. |
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