擦肩而过到精准认知-光学%2f无线电融合测量在Toutatis小行星探测数据中的工程科学应用.pdfVIP

From A Simple Flyby to Comprehensive Understanding —Engineering and scientific applications of optical/radio fusion measurement in Toutatis flyby data 1,2 1 2 1 Yanlong Bu , Geshi Tang , Chibiao Ding , Songjie Hu 1. Aerospace Flight Dynamics Laboratory, Beijing Aerospace Control Center, Beijing 100094, China; 2. Institute of Electronics, Chinese Academy of Sciences, 100190, China Abstract: Measurement and navigation based on optical imaging is the core technology in deep space exploration and spacecraft autonomous navigation. However, Chinas related technical practice and mission experience is limited by the chances of real mission, so the experience of Change-2s successfully flyby of Asteroid Toutatis on Dec.13, 2012 and acquired image data are very valuable. In the actual mission, tracking and control of Change-2 is not realized by auto-navigation of the spacecraft, however, the optical images taken by Change-2 conceal rich information about Asteroid Toutatis, the spacecraft itself and the navigation relationship therebetween. According to characteristics of this detection, combined with strategies during flyby and imaging, we established a complete set of optical/radio fusion-based measurement model, carrying out systematic studies of the detection data. This paper describes the optical/radio fusion-based measurement model, and emphatically describes the important scientific and engineering application of the fusion model in the detection of Asteroid Toutatis. Through the optical/radio fusion measurement, we successfully extract important information on motion and navigation from a flash across of Change-2, acquire more accurate perception of the physical characteristics of Toutatis; therefore, full