Home SRX-10i Interference Detection and Analysis System. Print General Information Real-time dual-band spectrum monitoring, interference detection and analysis system. SRX-10i is a complete spectrum monitoring, interference detection and analysis system in the GNSS bands fully developed by GMV following ICAO 8071 recommendations. Unintentional interference can emanate from telecommunication and electronic systems. Intentional interference can also emanate from jamming devices and GPS repeaters. The system has been designed to fulfill the need of spectrum monitoring whenever GNSS (such as GPS, Galileo, Glonass, etc.) is used in support of the operation of critical infrastructures such as airports. Download the Srx-10i brochure Eleven airports SRX-10i is currently installed at 11 major airports in Spain. Licensing and Prices For details on the licensing conditions and prices, please contact firstname.lastname@example.org. Benefits Uninterrupted, automatic interference monitoring in two GNSS bands. Dual-band simultaneous monitoring (e.g., GPSL1/Galileo E1 and GPSL5/GalileoE5a). Identification and characterization of detected interference. Sensor designed to optimize production costs and enable implementation at multiple points in the area to be monitored. Connectivity with the client and/or national alert management systems. Features SRX-10i Data Sheet SRX-10i provides the following capabilities for interference detection and analysis: Supported bands: GPS L1/Galileo E1 Glonass L1 GPS L5/Galileo E5a GPS L2 Galileo E5b Bandwidth: up to 40 MHz (20 MHz are normally required for each band). Configurable interference mask in dBW measured at the antenna port (the ICAO threshold is -150.5 dBW). Configurable spectrum resolution (600 Hz recommended). Continuous wave (CW; i.e., narrow band) and band-limited interference characterization Outputs Interference characteristics: Power Spectral Density (PSD) [dBW/Hz] Central frequency Bandwidth Voltage Timestamp Reports: Daily/weekly reports Summary of interference detected in all nodes Components The SRX-10i system is comprised of two components: Sensor network. Each monitoring node includes RF front-end real-time processing software running on an integrated computer (see figure below). Central analysis node. The central node collects the data sent by the sensors and provides analysis capabilities to process the recorded signal samples and characterize interference events. Procedures The system can be integrated easily into existing GNSS monitoring networks. Each local monitor processes the RF signal potentially contaminated by interference by digitally converting the I/Q samples obtained from the front end to compute the power spectrum density (PSD), which is used to identify and characterize interference in the input signal. When interference is detected, an alarm is sent to the central node and a local file is created with the characterization of the alarm. This file is downloaded by the central node to complete the analysis. Interference Monitoring The SRX-10i core system includes a built-in autonomous interference event monitor. This monitor informs the operator about the interference detected by the remote local monitors. Based on the information provided, the operator can order detailed analyses of the reported interference events. The system generates three types of alarm messages: Interference Alarms: alarms sent by the sensors when they detect local interference. Life Signal: this is a keep-alive message sent by the sensors to indicate that they are running and that the communication link is operational. Station Unavailable: these alarms are generated internally by the central analysis service in case the life-signal from a given remote station is not received in due time. Interference Analysis The SRX-10i system includes a built-in analysis tool that enables operators to plot the measured spectrum and obtain quantitative information on the interference detected. The analysis tool can also generate reports with the following content: Power spectrum density, including maximum power [dBm] and bandwidth [kHz] for each maximum frequency [MHz]. Interference location and timestamp. Real Cases The following figures show real cases of GPS interference detected with SRX-10i. Details on the location where interference was detected and the source are confidential, so they have been omitted from the graphical representations.