Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 22243 10.12737/stp-42201804 Results of current research Results of current research Results of current research Diagnostics of HF radio channel: based on data from backscatter ionospheric sounding by continuous chirp signal Diagnostics of HF radio channel: based on data from backscatter ionospheric sounding by continuous chirp signal https://orcid.org/0000-0002-1371-6855 Пономарчук Сергей Николаевич Ponomarchuk Sergey Nikolaevich spon@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-6472-5006 Грозов Виктор Петрович Grozov Viktor Petrovich grozov@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Котович Галина Васильевна Kotovich Galina Vasilyevna kotovich@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0001-5120-1150 Куркин Владимир Иванович Kurkin Vladimir Ivanovich kurkin@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Пензин Максим Сергеевич Penzin Maksim Sergeevich penzin.maksim@gmail.com Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar-Terrestrial Physics SB RAS Irkutsk Russian Federation Институт солнечно-земной физики СО РАН Иркутск Россия Institute of Solar Terrestrial Physics SB RAS Irkutsk Russian Federation 4 2 17 23 https://naukaru.ru/en/nauka/article/22243/view

Backscatter ionospheric sounding (BIS) is a powerful tool for monitoring and predicting conditions of operation of HF communication systems. The BIS method is adopted to determine coverage areas of radio waves and maximum usable radio frequencies, distance along the ground to a scatterer, as well as to gain information about ionospheric structure and conditions. To solve these problems, we propose a method for direct diagnostics of HF radio channel at the leading edge of BIS signals on ionograms. The method relies on real-time automatic processing and interpretation of BIS ionograms. We present algorithms for determining the maximum usable frequencies and characteristics of oblique sounding signals from current BIS data, without correcting ionospheric parameters. We realize the algorithm for recovering ionospheric parameters at the path midpoint.

Backscatter ionospheric sounding (BIS) is a powerful tool for monitoring and predicting conditions of operation of HF communication systems. The BIS method is adopted to determine coverage areas of radio waves and maximum usable radio frequencies, distance along the ground to a scatterer, as well as to gain information about ionospheric structure and conditions. To solve these problems, we propose a method for direct diagnostics of HF radio channel at the leading edge of BIS signals on ionograms. The method relies on real-time automatic processing and interpretation of BIS ionograms. We present algorithms for determining the maximum usable frequencies and characteristics of oblique sounding signals from current BIS data, without correcting ionospheric parameters. We realize the algorithm for recovering ionospheric parameters at the path midpoint.

 ionosphere ionogram radio wave propa-gation backscatter ionospheric sounding ionosphere ionogram radio wave propagation backscatter ionospheric sounding

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