Evaluation of GPS L5 and Galileo E1 and E5a Performance for Future Multifrequency and Multiconstellation GBAS

Mihaela-Simona Circiu, Michael Meurer, Michael Felux, Daniel Gerbeth, Steffen Thölert, Mariano Vergara, Christoph Enneking, Matteo Sgammini, Samuel Pullen and Felix Antreich

Peer Reviewed

Abstract: This paper presents the performance analysis of signals from the Galileo satellites in the E1 and E5a frequency bands and GPS L5 signals as measured by DLR’s experimental ground-based augmentation system. The results show that the raw noise and multipath level of Galileo signals and of the GPS L5 signals are smaller than that of GPS L1. The new signals are also less sensitive to the choice of carrier-smoothing time constant. Furthermore, the inter-frequency biases that affect dual-frequency processing are investigated. These biases differ between satellites and depend on satellite and receiver hardware, but they can be determined a priori. With known receiver and antenna configurations, it is possible to correct for these biases. A residual uncertainty associated with the bias correction has to be taken into account. This can be modeled as part of the ground and airborne bounding standard deviations (spr_gnd and spr_air) used in GBAS processing.
Published in: NAVIGATION: Journal of the Institute of Navigation, Volume 64, Number 1
Pages: 149 - 163
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