A New Approach to Solve the Rotation Issue of the Autonomous Navigation Constellation
- Paper number
IAC-07-B2.I.08
- Author
Dr. Ping Shuai, China Academy of Space Technology (CAST), China
- Coauthor
Dr. Ming Li, China Academy of Space Technology (CAST), China
- Coauthor
Mr. Shaolong Chen, China Academy of Space Technology (CAST), China
- Coauthor
Mr. Yifan Wu, China Academy of Space Technology (CAST), China
- Coauthor
Dr. Chunqing Zhang, China Academy of Space Technology (CAST), China
- Year
2007
- Abstract
There is the issue of the whole constellation rotation error accumulating with time for the autonomous navigation constellation based on the inter-satellate links. Therefore it is very difficult to keep the constellation autonomously operating for a long time. A new approach to solve the constellation rotation issue is using the X-ray signal emitted by the pulsar as an exterior space-time reference. When the X-ray photons from the pulsar are detected with the on-board detector, the pulse profile of the pulsar is folded and the image also obtained. And then pulse arrival time is recorded with the on-board atomic clock. Moreover, the navigation parameters for the satellites, including the position, velocity, attitude and time, can be determined highly-accurately by the data processing with the on-board computer. The X-ray signal from the pulsar provides an absolute space-time reference for the autonomous navigation of the navigation satellite, and thus there is not the constellation rotation issue. Consequently, the constellation is able to operate autonomously during a long time. The basic principle and algorithm using X-ray pulsar navigation (XPNAV) are described systematically in this paper. Especially, the robust filtering algorithms of the autonomous information processing for the navigation satellite are studied in detail.Finally, by analyzing the results of simulating example, the feasibility and rationality to solve the rotation issue for the autonomous navigation constellation using the X-ray pulsar is demonstrated significantly.
- Abstract document
- Manuscript document
IAC-07-B2.I.08.pdf (🔒 authorized access only).
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