A Novel Surface Feature Navigation Algorithm Using Ray Tracing

Gnam, Chris ; Liounis, Andrew ; Ashman, Benjamin ; Getzandanner, Kenneth ; Lyzhoft, Joshua ; Small, Jeffrey ; Highsmith, Dolan ; Adam, Coralie ; Leonard, Jason ; Antreasian, Peter(KinetX Aerospace, Inc, Simi Valley, CA, United States)

关键词: ALGORITHMS;    CAMERAS;    LANDMARKS;    POSITION (LOCATION);    RAY TRACING;    RELIEF MAPS;    SURFACE NAVIGATION;    TOPOGRAPHY;   

RP-ID  :  GSFC-E-DAA-TN74566

学科分类：航空航天科学

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

We demonstrate a novel single-bounce ray tracing approach to landmark identification for surface feature-based relative navigation. A priori knowledge of the camera pose and known topographic maps for each landmark are used to render the potentially visible landmarks via ray tracing into the image frame. These templates are registered with a search region around the predicted location for each landmark in the image, to locate its observed center. This procedure is applied to images from the OSIRIS-REx Orbital A and Orbital B mission phases, and the results are compared with those obtained via previous landmark identification methods.