GPS global detection of the ionospheric response to solar flares

This author suggests the concept of a new technology for global detection ( GLOBDET) of atmospheric disturbances of natural and technogenic origin, on the basis of phase measurements of the total electron content (TEC) in the ionosphere using an international GPS network. Temporal dependencies of TEC are obtained for a set of spaced receivers of the GPS network simultaneous ly for the entire set of "visible" (over a given time interval) GPS satelli tes (up to 5-10 satellites). These series are subjected to filtering in the selected range of oscillation periods using algorithms for spatiotemporal analysis of signals of nonequidistant GPS phased antenna arrays which are a dequate to the detected disturbance. An analysis is made of the possibiliti es of using the GLOBDET when detecting the ionospheric response of solar fl ares. In this case it is best to make the coherent summation of the filtere d series of TEC. Powerful impulsive flares of July 29, 1999, and December 2 5, 1999, were chosen to illustrate the practical implementation of the prop osed method.