Preliminary Experiments of GPS/INS Based Integrity Monitoring Using MSAS Differential Correction Data

Abstract

Japan Aerospace Exploration Agency (JAXA) has developed several GPS/INS systems called GAIA (GPS Aided Inertial navigation Avionics) for over ten years and succeeded in automatic landing of unmanned experimental vehicle in differential mode. In order to use GAIA for civil aviation, JAXA has been developing a fault detection and exclusion (FDE) software for integrity monitoring based on filter bank method. On the other hand, a Japanese satellite based augmentation system, MSAS (MTSAT Satellite-based Augmentation System) is planned to be operational in 2007, and the test signal is transmitted. A flight experiment to collect MSAS data was conducted and GPS/MSAS data were used to compute horizontal protection level (HPL). The GPS/INS filter bank method showed a reduced HPL, compare to MSAS-based HPL.