Abstract
We present the results of observations of round-the-world (RTW) signals by the Russian chirp-sounder network in 1997-1999. The frequency-time intervals of the RTW propagation with minimum attenuation are determined. Using numerical simulations of HF signals based on the waveguide and geometric-optical approaches, we perform the interpretation of the experimental data. It is shown that RTW-signal attenuation is mainly determined by the state of the low-latitude ionosphere in African and Asian-Pacific longitude regions. The possibilities of monitoring large-scale structures of the low-latitude ionosphere in regions poorly equipped with diagnostic tools using the RTW-signal characteristics of the Russian chirp-sounder network are discussed.
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Kurkin, V.I., Nosov, V.E., Matyushonok, S.M. et al. The Features of Round-the-World Signal Propagation over the Paths of the Russian Chirp-Sounder Network during Low and Mild Solar Activity. Radiophysics and Quantum Electronics 43, 755–765 (2000). https://doi.org/10.1023/A:1010324315738
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DOI: https://doi.org/10.1023/A:1010324315738