In a paper instrumental and methodical peculiarities of a construction of two- frequency systems for a measurement of ionospheric parameters by a IS technique are considered. The structure and operation
exposition of a synchronization and assigning system of the radar IS by realizing a two- frequency mode of an ionosphere exploration is reduced. The results of experimental measurements in by using of this mode are presented
Abstract Parameters variations researches results of ionosphere, which accompanied a magnetic storm with the main phase on October 1, 2002, performed on the Kharkov incoherent scatter radar are presented. According to time variations of concentration, speed, ion temperature of solar wind, induction module variation of IMF measured on artificial satellite "ACE" the picture of the sudden beginning, and also courses of an ionospheres storm is restored
