Total System Error Performance During Precision Approaches

Abstract

Abstract—This paper gives an overview of the error performance of different navigation sensors used in an A320 research aircraft. In particular, the Total System Error (TSE) performance during precision approaches is investigated. Different approaches based on the Instrument Landing System (ILS) as well as based on the GNNS Landing System (GLS) were conducted manually with a research aircraft of the German Aerospace Center (DLR). The main focus of the work is put on comparing the TSE during the two different types of approaches. The goal is to show that the TSE performance is equivalent for both guidance systems and that GLS could therefore be used for simultaneous approach operations onto parallel runways. In addition, the position accuracy in the vertical domain of different sensors is investigated. Here we compare a Ground Based Augmentation System (GBAS) and the barometric altitude sensor of the basic aircraft.