A.S. Davidenco - Head of Group, LTD «Special Technological Center» (St. Petersburg). E-mail: ammodo@yandex.ru A.P. Melikhova - Software Engineer, LTD «Special Technological Center» (St. Petersburg). E-mail: antonina_92@list.ru

The accuracy of user-s coordinates estimations by signals of global navigation satellite systems (GNSS) can be significantly reduced due to the impact of intentional or unintentional interferences to the system. In this case estimated coordinates would significantly differ from their true values and in order to increase the reliability user-s positioning it is necessary to process GNSS integrity monitoring. The receiver-autonomous Angle-of-Arrival (AOA) integrity monitoring method is based on the comparison between tow kinds of direction-finding (DF) parameters - calculated and measured. Differences between them are used for decision-making procedure about the GNSS integrity. The situation when module of the difference exceeds the threshold value is interpreted as the fact of integrity violation. The effectiveness of this method increases with accuracy of DF parameters estimation. This accuracy can be improved by appropriate antenna configuration. The analysis of two-dimensional R-function reflect the potential accuracy of such measurements. It was found that in case of antenna elements number limiting the configuration «triangle in triangle» provides the best accuracy of DF parameters estimation. This configuration was used for experimental tests of the AOA method which confirmed method effectiveness.

 

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