Description: In the article there were described certain conditions for experimental research of the efficiency of navigation signal recep-tion and the accuracy of positioning of satellite navigation systems by single-frequency receivers under the influence of irregular variations of space weather based on the use of the method of spaced-up reception on the principle of phase interferometer. There were carried out the analysis of the obtained results of experimental researches. We present recommendations, developed on the basis of experimental research regarding the implementation of mechanisms for increasing the efficiency of reception of signals and the accuracy of the positioning of aircraft using three single-frequency receivers of satellite navigation systems sig-nal under conditions of destabilizing influences of geomagnetic storms. According to the results of experimental research, the op-timal geometry of the distance between antennas of receivers is determined. The efficiency criteria are qualitative reception of signals of satellite navigation systems and the correlation of ionospheric navigational errors of on-board navigation equipment of satellite navigation system user in the composition of the flight and navigation complex of civil aviation aircraft with the use of three single-frequency GPS signal receivers. It leads to an increasing of the reception efficiency of satellite navigation systems signals compared to existing approaches in conditions of destabilizing effects of space weather. Three onboard single-frequency receivers of the satellite navigation signal should form an equilateral triangle with a length of sides 5 (where = 0,19029367 m - operating wavelength of the navigation signal). It is determined that during a weak magnetic storm (Ar = 35-45 nTl), com-pared to a calm geomagnetic environment (Ar= 8-10 nTl), the amplitudes of short-period variations of the fluctuation part of the ionospheric error increase from the first centimeters to tens of centimeters. The compensation of the fluctuation part of the iono-spheric error, in addition to correction of the regular component of the ionospheric error, can increase the accuracy of determin-ing the location of the aircraft.
Keywords: single-frequency satellite signal receivers, destabilizing factors, functional stability, quality of satellite signals receipt, positioning accuracy