GPS services is generally being used in the navigation application such as the car navigation and the smart phone.  Recently, GPS services continue to increase in the timing application such as the mobile telecommunication network, the smart grid, and the financial network. As GPS signals are sensitive to GPS interference, it should be monitored and protected. By means of the project of the utilization technologies and monitoring technologies for multiple navigation frequencies, ETRI is developing the GPS interference equipment which provides the interference detection, the direction finding and the location. This paper presents the implementation and the test results of the GPS interference equipment.

Keywords: GPS, interference, monitoring equipment