On the possibility of bistatic HF ionospheric sounding by exact time signals von S. B. Kashcheev, A. V. Zalizovskij, A. A. Sopin, I. I. Pikulik

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Statistic of Seasonal and Diurnal Variations of Doppler Frequency Shift of HF Signals at Mid-Latitude Radio Path von A. I. Reznichenko, A. V. Koloskov, A. A. Sopin, Ju. M. Jampolskij

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