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M. Nechaeva
Radiophysical Research Institute (NIRFI), 25/12a B. Pecherskaya Str., Nizhnij Novgorod, 603950, Russian Federation
D. Adamchik
Lobachevsky State University of Nizhnij Novgorod (UNN), 23 Gagarin Ave., Nizhnij Novgorod, 603950, Russian Federation
Vl. Bezrukovs
Engineering Research Institute “Ventspils International Radio Astronomy Centre” of Ventspils University College (VIRAC), 101 Inzenieru Str., Ventspils, LV-3601, Latvia
N. Dugin
Radiophysical Research Institute (NIRFI), 25/12a B. Pecherskaya Str., Nizhnij Novgorod, 603950, Russian Federation
Lobachevsky State University of Nizhnij Novgorod (UNN), 23 Gagarin Ave., Nizhnij Novgorod, 603950, Russian Federation
I. Shmeld
Engineering Research Institute “Ventspils International Radio Astronomy Centre” of Ventspils University College (VIRAC), 101 Inzenieru Str., Ventspils, LV-3601, Latvia
Y. Tikhomirov
Radiophysical Research Institute (NIRFI), 25/12a B. Pecherskaya Str., Nizhnij Novgorod, 603950, Russian Federation