Modelling of the Propagation of Radio Waves Transmitted by GPS Satellites in an Ionosphere with Irregularities

Abstract

The results concerning the modelling of the propagation of radio waves transmitted by GPS satellites in the presence of sporadic E layers are described. The greatest deviations of the difference between the true path and the geometrical path found for the higher frequency from the difference true path-geometrical path obtained for the lower frequency attain values of the order of 26 cm at the zenith angle 75° of the satellite in the N-S direction (summer, night and low solar activity conditions) and about 7 cm in the W-E direction (summer and winter night, as well as low solar activity conditions).