Impact of GNSS-Band Radio Interference on Operational Avionics

Abstract

It is a well-known and documented problem within the aviation community that outages in satellite navigation services make performance-based navigation (PBN) operations, as defined by ICAO (2008), using low required navigation performance (RNP) values impossible in various parts of the world (Berz, 2016). In these areas, Global Navigation Satellite System (GNSS) receivers do not always function as desired. Radio-frequency interference (RFI) has long been touted as the main reason for such outages in GNSS-based services, not only for aviation users but also for maritime applications (Pérez Marcos, et al., 2018).Here, we summarize the findings of a test flight conducted specifically to assess the impact of the RFI on operational GNSS avionics' multimode receivers (MMR), such that the findings could be representative of a broader class of mainline passenger aircraft. The test flight included equipment to study the issue at different levels of abstraction: directly in the cockpit as observed by pilots in the operational environment, at the level of GNSS observables, and directly in the radio spectrum. EXPERIMENT DESIGNOne location that has reported difficulties with GNSS outages is the Nicosia Flight Information Region. The Department of Civil Aviation of the Republic 1 German Aerospace Center (DLR)

Statistical Analysis and Effects of Radio Frequency Interference in GPS Signal Quality in Thailand

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