Conception, Implementation and Validation of a GAST-D Capable Airborne Receiver Simulation

Mirko Stanisak, Roman Schork, Marita Kujawska, Thomas Feuerle, Peter Hecker

Abstract:	The Ground Based Augmentation System (GBAS) allows approaching aircraft to perform precision approaches based on a Global Navigation Satellite System (GNSS) by providing differential corrections and integrity information to the aircraft. After some years of development, the first ground stations have recently been approved for Cat. I operations (e.g. in Bremen, Germany). Nevertheless support for precision approaches with a decision height of less than 200 ft is a crucial requirement especially for larger airports. Thus, the GBAS community has introduced the GBAS Approach Service Type D (GAST-D) that provides sufficient performance in order to allow Cat. II/III operations using single-frequency GPS. Other than for GBAS Cat. I, the GBAS ground facility is not responsible for mitigating all possible hazards for GBAS integrity, but shares the responsibility with the airborne GBAS receiver. Due to this, a GAST-D capable aircraft receiver is much more complex than for GBAS Cat. I. In this paper, the components required for such a receiver are explained and combined into a generic GAST-D airborne processing scheme. Two different implementations using this scheme are presented. Finally, based on an experimental GAST-D ground facility in Braunschweig (Germany), some validation results are presented as well.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	250 - 257
Cite this article:	Stanisak, Mirko, Schork, Roman, Kujawska, Marita, Feuerle, Thomas, Hecker, Peter, "Conception, Implementation and Validation of a GAST-D Capable Airborne Receiver Simulation," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 250-257.
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