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27 April 2007 Use of X-band weather radar to support the terrain database integrity monitoring and terrain referenced navigation function
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Abstract
To enable safe use of Synthetic Vision Systems (SVS) at lower altitudes, real-time sensor measurements are required to ensure the integrity of terrain and obstacle models stored in the onboard SVS and to detect hazards that may have been omitted from the stored models. This paper discusses various aspects of using X-band weather radar for terrain database integrity monitoring and terrain referenced navigation. Feature extraction methods will be addressed to support the correlation process between the weather radar measurements and the stored terrain databases. Furthermore, improved weather radar antenna models will be discussed to more reliably perform the shadow detection and extraction (SHADE) functionality. In support of the navigation function, methods will be introduced to estimate aircraft state information, such as velocity, from the geometrical changes in the observed terrain imagery. The outputs of these methods will be compared to the state estimates derived from Global Positioning System (GPS) and Inertial Navigation System (INS) measurements. All methods discussed in this paper will be evaluated using flight test data collected with a Gulfstream V in Reno, NV.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Abhijeet Singh and Maarten Uijt de Haag "Use of X-band weather radar to support the terrain database integrity monitoring and terrain referenced navigation function", Proc. SPIE 6559, Enhanced and Synthetic Vision 2007, 655909 (27 April 2007); https://doi.org/10.1117/12.725075
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