Abstract
As the Ground Based Augmentation Systems (GBAS) have to often operate in close proximity to high traffic roads, parking garages, and other transportation infrastructure, the chances of being affected by unintentional Radio Frequency Interference (RFI) from low-cost jamming devices and malfunctioning equipment are high. Multiple recent studies have indicated that interference levels in such environments are frequently exceeding the tolerable limits for safety-critical system/infrastructure operations. It is therefore important for GBAS to have effective RFI detection and mitigation mechanisms. This article presents sample results and analysis of GNSS receiver responses to different RFI signal types generated based on real life observations made as part of multi-dimensional parameter spaces extracted from a multi-site, multi-year monitoring campaign carried out in Europe and Scandinavia. The obtained results are discussed in light of RFI monitor design in support of the dual frequency multi constellation (DFMC) GBAS ground system providing initial recommendations for the potential monitoring scheme with respect to which observables should be used and how they interrelate over the various RFI signal types.