The Ground-based Regional Augmentation System (GRAS) Receiver Development project is an ARC Linkage collaboration between Airservices Australia, GPSat Systems Australia and ARCAA.
The aim of the project is to develop improved navigation methods for civilian General Aviation aircraft in regional areas of Australia.
The Ground-based Regional Augmenation System is a GNSS Augmentation system developed as an alternative to Space Based Augmentation Systems (SBAS) such as the United States' Wide Area Augmentation System (WAAS) or Europe's European Geostationary Navigation Overlay Service (EGNOS).
The objectives of the project are to:
- Develop new strategies for the use of low-cost MEMS technology inertial sensors, air data sensors, GPS and GRAS measurements to aid in the integrity monitoring process, to bridge outages in a GRAS VHF network;
- Implement the architecture onto a prototype system for use in flight testing;
To meet these objectives, ARCAA researchers are investigating the following approaches:
- Integration of an aircraft aerodynamic model with GNSS and Inertial sensors; and
- Investigation of Sigma-point Kalman Filters for improved GNSS integrity;
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A notional illustration of the potential of advanced integrity methods for approach procedures in regional areas. |
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