ABSTRACT
Signal monitoring is one of the basic tasks, which are included in the satellite system maintenance. Currently, the civil aviation, in terms of navigation, above all, develops solutions based on satellites, indicating them as future-orientated. This activity is coordinated by the ICAO (International Civil Aviation Organization), which oversees the operations of the Global Navigation Satellite System (GNSS). The analysis of satellite system errors is a major aspect limiting the operational functioning of such systems in air transport. From the point of view of this study, the tropospheric and ionospheric errors deserve special attention. It turns out that the time of year and even time of day can have a significant impact on the quality of the satellite signal and, therefore, on the operational safety of aircraft. Relationships occurring between selected external factors (temperature, pressure, cloudiness, precipitation, air humidity) and their very effect on the signal interferences—will be tested using fuzzy reasoning.
