IONOSPHERIC EFFECT OF LUNAR ECHO FROM A SPACE GAMMA-RAY FLARE

According to the data of the method of partial reflections (PRM), the behavior of the polar lower ionosphere above the settlement of Tumanny in the Murmansk region is considered during the registration of a powerful gamma-ray flare from the Soft Gamma-ray Repeater (SGR) 1806-20. It is shown, that observable disturbances of the night dark ionosphere can be caused by the flux of gamma-photons from this repeater reflected from the Moon.