[1] RAS, PN Lebedev Phys Inst, Moscow, Russia
[2] Shandong Inst Adv Technol, Jinan, Shandong, Peoples R China
[3] Natl Space Sci Ctr, Beijing, Peoples R China
[4] North West Univ, Ctr Space Res, Potchefstroom, South Africa
[5] North West Univ, Sch Phys & Chem Sci, Mmabatho, South Africa
[6] Univ Kiel, Inst Expt & Appl Phys, Kiel, Germany