Abstract
We provided an overview of various satellite-based augmentation systems (SBAS) options for augmented GNSS services in Australia, and potentially New Zealand, with the aim to tease out key similarities and differences in their augmentation capabilities. SBAS can technically be classified into two user categories, namely SBAS for aviation and “non-aviation” SBAS. Aviation SBAS is an International Civil Aviation Organization (ICAO) certified civil aviation safety-critical system providing wide-area GNSS augmentation by broadcasting augmentation information using geostationary satellites. The primary aim was to improve integrity, availability and accuracy of basic GNSS signals for aircraft navigation. On the other hand, “non-aviation” SBAS support numerous GNSS applications using positioning techniques such as wide-area differential-GNSS (DGNSS) and precise point positioning (PPP). These services mainly focus on delivering high-accuracy positioning solutions and guaranteed levels of availability, and integrity remains secondary considerations. Next-generation GNSS satellites capable of transmitting augmentation signals in the L1, L5 and L6 frequency bands will also be explored. These augmentation signals have the data capacity to deliver a range of augmentation services such as SBAS, wide-area DGNSS and PPP, to meet the demands of various industry sectors. In addition, there are well-developed plans to put in place next-generation dual-frequency multi-constellation SBAS for aviation. Multi-constellation GNSS increases robustness against potential degradation of core satellite constellations and extends the service coverage area. It is expected that next-generation SBAS and GNSS will improve accuracy, integrity, availability and continuity of GNSS performance.
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Acknowledgments
The authors would like to thank the Australian Cooperative Research Center for Spatial Information (CRCSI) and the School of Science in RMIT University for funding the project “Satellite Delivery of Augmented Positioning Data for PPP and PPP-RTK Services in Australia and New Zealand,” which this paper draws from. The authors gratefully acknowledge Dr. John Dawson from Geoscience Australia and an anonymous reviewer for reviewing this paper.
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Choy, S., Kuckartz, J., Dempster, A.G. et al. GNSS satellite-based augmentation systems for Australia. GPS Solut 21, 835–848 (2017). https://doi.org/10.1007/s10291-016-0569-2
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DOI: https://doi.org/10.1007/s10291-016-0569-2