Yu.V. Vekshin – Master, Junior Research Scientist, Institute of Applied Astronomy RAS (Saint Petersburg) E-mail: yv.vekshin@iaaras.ru

V.O. Ken – Junior Research Scientist, Institute of Applied Astronomy RAS (Saint Petersburg) E-mail: ken@iaaras.ru

E.Yu. Khvostov – Research Scientist, Institute of Applied Astronomy RAS (Saint Petersburg) E-mail: hey@iaaras.ru

A.P. Lavrov – Dr.Sc.(Phys.-Math.), Senior Research Scientist, Professor, Higher School of Applied Physics and Space Technologies of Peter The Great St. Petersburg Polytechnic University E-mail: lavrov_ap@spbstu.ru