The GNSS interference monitoring system which can detect, characterize and geo-locate the interference sources plays an important role for monitoring interference environment and generating situational awareness of possible degradation of GNSS performance to users. The geolocation of the interference sources can be obtained using several kinds of measurements from multiple sensor nodes such as angle-of arrival (AOA), time difference of arrival (TDOA), frequency difference of arrival (FDOA), and power difference of arrival. And the performance of geolocation accuracy depends on the measurement’s errors and relative location between sensor nodes and interference sources. In this paper, the geolocation accuracy of GNSS interference monitoring system using AOA measurements is analyzed by simulation in terms of CEP contour in monitoring region and error ellipse for specific points according to the distribution of multiple static sensor nodes.

Keywords: GNSS interference, angle of arrival, geolocation