DETERIORATION OF POSITIONING ACCURACY OF THE GPS SYSTEM DUE TO THE EFFECT OF IONOSPHERIC BUBBLES
State of the ionosphere influences stability of operation of satellite radio navigation systems. The dense network of GEONET GPS stations in Japan allows us to make a thorough study of stability of the system operation at middle latitudes under different heliogeophysical conditions. This paper explores the deterioration of positioning accuracy of the GPS system due to the effect of a large-scale ionospheric disturbance (ionospheric bubble) over Japan on 12 February 2000.