PEGASUS

PEGASUS (Prototype EGNOS and GBAS Analysis System Using SAPPHIRE) is a prototype which allows analysis of GNSS data collected from different SBAS and GBAS systems and using only algorithms contained in the published standards. The tool has been developed in the frame of the GNSS-1 operational validation activity defined in the EUROCONTROL SBAS project and aims to be a first step forward the development of a standard processing and analysing tool to be used for the future EGNOS operational validation.

PEGASUS was designed to facilitate the output data handling and interchange. The tool provides several functionalities such as computation of position and GNSS systems attributes like accuracy, reliability, and availability simulating MOPS-compliant receivers, computation of trajectory errors, prediction of accuracy and availability with the required integrity and simulation of GBAS Ground Station processing algorithms

Since June 2003 the GBAS Modular Analysis and Research System (MARS) is integrated in PEGASUS in order to support GBAS data processing needs and activities. The GBAS MARS allows to collect and evaluate relevant data and provide required results and is able to assist Air Traffic Service Providers to aid site approval and obtain operational approval of a GBAS installation for supporting CAT-I precision approach conditions at an airport from their respective safety regulation authorities.

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