Effects of the Chelyabinsk Meteoroid Entry at the Ionosphere

The transionospheric sounding by signals from the GPS cluster satellites carried out in the zone of explosion of the Chelyabinsk bolid has shown that the explosion had a very weak effect on the ionosphere. The observed ionosphere disturbances were asymmetric with respect to the explosion epicenter. The signals obtained were compared both in shape and in amplitude with the known Earth surface explosions. Ionosphere effects in the form of acoustic-gravity waves (AGW) produced by 260-500 tons TNT explosions on the ground are detected with confidence both by vertical sounding and by GPS techniques. This allows us to suggest that the reported equivalent of the meteoroid explosion was obviously overestimated.