Simulation of Integrity and Availability of multi-constellation and multi-frequency GNSS augmentation systems

GNSS augmentation systems (such as GBAS and SBAS) work around the central concept of providing Integrity to the user. The Integrity is a measure of reliability that the user can place on the system to provide a certain guaranteed performance and timely warning from potentially unfavorable scenarios. Various performance assessment studies use Integrity as a performance indicator and the computation of Integrity is a complex function of many inter-dependent system states. In the project described here an end-to-end software simulator has been designed and developed which uses simulated raw data for real scenarios. This paper provides a brief description of the capabilities of the simulator and example simulation results.