Effects of prolonged GNSS jamming on a continuously operating monitoring station
2025
Saajasto, Mika | Bhuiyan, Zahidul M. H. | Rikkinen, Topi | Marila, Simo | Kaasalainen, Sanna | Maanmittauslaitos | National Land Survey of Finland | 0000-0002-2701-2170 | 0000-0002-3801-1018 | 0000-0001-6628-418X
Recent changes in the geopolitical climate in Europe have led to increasing number of reported GNSS (Global Navigation Satellite System) interference incidents. Most of these incidents have been reported by civil aviation, however, the shipping industry has also suffered from the degraded availability of GNSS. The situation is challenging as these events are not transient and can last for several hours. In this paper, we discuss one such prolonged GNSS jamming event detected at one of the continuously operating monitoring stations belonging to the Finnish national monitoring station network. We show that the jamming was strong enough to cause loss of all signals at or close to the L1/E1 band, and loss of the L2 and L5 signals. However, the Galileo E5 and E6 bands were able to sustain the jamming. The station was able to provide a position fix throughout the jamming, but the accuracy was degraded by up to three orders of magnitude. Although the accuracy during the jamming is not sufficient for applications requiring high precision, it does show the advantages of utilising Multi Constellation Multi Frequency (MCMF) receivers, especially for applications where reliable availability of PVT or time synchronisation via GNSS are required.
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