Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 38137 10.12737/stp-62202004 Reviews Reviews Reviews All-atmosphere IS-MST Radar All-atmosphere IS-MST Radar https://orcid.org/0000-0003-0660-8474 Медведев Андрей Всеволодович Medvedev Andrey Vsevolodovich medvedev@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Потехин Александр Павлович Potekhin Aleksandr Pavlovich potekhin@iszf.irk.ru

доктор физико-математических наук;

doctor of physical and mathematical sciences;

 Сетов Артём Геннадьевич Setov Artem Gennadyevich artemsetov@gmail.com

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Кушнарев Дмитрий Сергеевич Kushnarev Dmitriy Sergeevich ds_k@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 https://orcid.org/0000-0002-8662-9058 Лебедев Валентин Павлович Lebedev Valentin Pavlovich lebedev@iszf.irk.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 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 6 2 41 48 https://naukaru.ru/en/nauka/article/38137/view

The IS-MST radar, as the name implies, combines two different methods for studying the atmosphere using a backscatter signal. Turbulent fluctuations of the medium cause scattering in the mesosphere—stratosphere—troposphere (MST). In the upper atmosphere, incoherent scatter (IS) appears in ionospheric plasma. Special-purpose instruments have been built before such that measurements in one of these modes were the most effective. MST radars were utilized for studying wave activity in the lower and middle atmosphere; the IS radar, for ionospheric research. Nowadays, however, for a comprehensive investigation of atmospheric phenomena, it is necessary to have an idea of processes in all atmospheric layers and near-Earth space. The radar, which combines capabilities of IS and MST measurements, will be able to cover layers from the troposphere to the plasmosphere and to study processes of energy transfer from the lower and middle atmosphere to the ionosphere as well as the interaction of the magnetosphere with the upper atmosphere. Apart from atmospheric research, the radar will allow us to track spacecraft and space debris, determining precise coordinate characteristics. The antenna system is also suitable for radio astronomical observations. In the paper, we provide justification for the 154–162 MHz frequency range and discuss technical solutions of the IS-MST radar project and basic operating modes. In addition, we estimate radar diagnostic capabilities for different types of measurements.

The IS-MST radar, as the name implies, combines two different methods for studying the atmosphere using a backscatter signal. Turbulent fluctuations of the medium cause scattering in the mesosphere—stratosphere—troposphere (MST). In the upper atmosphere, incoherent scatter (IS) appears in ionospheric plasma. Special-purpose instruments have been built before such that measurements in one of these modes were the most effective. MST radars were utilized for studying wave activity in the lower and middle atmosphere; the IS radar, for ionospheric research. Nowadays, however, for a comprehensive investigation of atmospheric phenomena, it is necessary to have an idea of processes in all atmospheric layers and near-Earth space. The radar, which combines capabilities of IS and MST measurements, will be able to cover layers from the troposphere to the plasmosphere and to study processes of energy transfer from the lower and middle atmosphere to the ionosphere as well as the interaction of the magnetosphere with the upper atmosphere. Apart from atmospheric research, the radar will allow us to track spacecraft and space debris, determining precise coordinate characteristics. The antenna system is also suitable for radio astronomical observations. In the paper, we provide justification for the 154–162 MHz frequency range and discuss technical solutions of the IS-MST radar project and basic operating modes. In addition, we estimate radar diagnostic capabilities for different types of measurements.

 IS-MST radar National Heliogeophysical Complex incoherent scatter mesosphere-stratosphere-troposphere radar ionosphere atmosphere IS-MST radar National Heliogeophysical Complex incoherent scatter mesosphere-stratosphere-troposphere radar ionosphere atmosphere

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