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Abstract
The effect of the radiation pressure and Poynting-Robertson effect on the evolution of the orbits of satellites in low-order resonance regions is studied, depending on their area-to-mass ratio (AMR). The regions of low-order resonance zones 1:1, 1:2 and 1:3 are considered. The orbital evolution of geosynchronous, supergeosynchronous, GPS, Molniya and circular equatorial objects for resonances 1:2, 1:3 are studied from numerical simulations on period of time 240 yr and from positional observations at the SBG telescope of the Astronomical Observatory of the Ural Federal University. Secular perturbations of semi-major axes of orbits, caused by the Poynting-Robertson effect, are estimated in the region of low-order resonance zones at different AMR.