Attitude DGPS/lNS Based Real-Time Flight Guidance System for Airborne Sensors

Guenter Hein, Bernd Eissfeller, and Juergen Pielmeier

Abstract:	At the ‘Institute of Geodesy and Navigation’, an advanced attitude DGPS/lNS based guidance system for high’ precision kinematic airborne sensor positioning and orientation in real-time is under development. The objective of this airborne system is to support the customer through all phases of flight with a reliable multifunctional navigation system. From take off over enroute navigation to remote sensing and back in real- time with high precision and maximum integrity. The navigation system has a flexible architecture. The kernel is a ‘Intel’ based multiprocessor system with scalable performance according the necessary requirements. Through the ‘Peripheral Component Interface’ up to three colour LC-Displays, a robust memory subsystem and other I/O interfaces as RS232/422, PC-Card and MilStd 1553B are connected to the system. This I/O interfaces enable it to connect nearly every navigation or remote sensor to the system to achieve the desired functionality. The main flight guidance program is responsible of time synchronization and control of the different program threads, parallel executed on the different processors, and the processing of the waypoint based flight plan. The onboard geographic and navigation database is used for optimal visualization of the actual flight situation and decision supporting of the flight crew. Two main conclusions can be summarized: At first, the integration of attitude, position and velocity information from the different navigation sensors increases precision and integrity for enroute navigation and complete airborne positioning of different remote sensors. Second, the flexible system architecture with it’s high performance multiprocessor kernel and open system interfaces enables easy application dependant integration of the desired navigation and/or remote sensors. The new aspects of this airborne application system can , be summarized as follows: - Scalable performance, open interfaces, easy integration, advanced visualization - High positioning precision and flight execution integrity - Complete navigation sensor integration of position, attitude and velocity in realtime - Easy remote sensor integration, monitoring and control.
Published in:	Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995) September 12 - 15, 1995 Palm Springs, CA
Pages:	1589 - 1596
Cite this article:	Hein, Guenter, Eissfeller, Bernd, Pielmeier, Juergen, "Attitude DGPS/lNS Based Real-Time Flight Guidance System for Airborne Sensors," Proceedings of the 8th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1995), Palm Springs, CA, September 1995, pp. 1589-1596.
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