Initial Orbit Determination of Initial Phase of Cislunar Transfer Trajectory with Space-based Angle Measurements
- Paper number
IAC-11,A3,2.P,13,x10502
- Author
Dr. Lei Liu, 1)Science and technology on aerospace flight dynamics laboratory, Beijing; 2)Beijing aerospace control center, Beijing;, China
- Coauthor
Mr. Zhi-fei Rong, Beijing Aerospace Control Center, China
- Coauthor
Ms. Ying Cui, Beijing Aerospace Control Center, China
- Year
2011
- Abstract
\S Initial orbit determination (IOD) of initial phase of cislunar Transfer Trajectory (IPCTT) with space-based angle measurements (SBAM) is discussed in this article. As errors of IPCTT play an important role on lunar exploration, tracking and IOD of IPCTT are vital to the lunar exploration. The tracking ways of IPCTT all rely on ground stations over the past few decades, which are nothing the matter to a global TT&C network but difficult to a local network. As to the local network, the SBAM can be adopted to determine IPCTT. Currently, the SBAM by SBV (i.e. space based visible) is already in test phase and can be employed to provide angle measurement for IOD of IPCTT. \S Based on the favorable measurement condition and current development of the space-based platform, the article focuses on IOD of IPCTT with SBAM to overcome limits of the local network. The space-based platforms include a single satellite, two constellation satellites, and several formation flying satellites, respectively. First, the space-based IOD models are studied, including synchro and unsynchro models for the latter two platforms. Second, noise smoothness of measurement data, effects of arc length and measurement geometry on the IOD precision are analyzed and worked over. Finally, numerical simulations on IOD of IPCTT with SBAM are presented and the model error disposal for the single platform is investigated. \S According to the simulation results, conclusions are drawn as follows: \begin{itemize}\item The IOD precision of IPCTT by the single platform is lower than common space targets, and the model error has to be modeled to restrain and even to eliminate its negative effect when using a long arc measurement. \end{itemize} \begin{itemize}\item As to the constellation platform, the IOD precision of the synchro model is equal to the unsynchro model with a short arc measurement, but is preferable to the latter with a long arc measurement. A long arc measurement is not always preferable for IOD of IPCTT because of the model error. Furthermore, the measurement geometry affects the IOD result little. \end{itemize} \begin{itemize}\item To the formation flying platform, the synchro model is obviously more favorable than the unsynchro one that is nearly the same as the single satellite platform on impacts of arc length and geometry. When the formation flying configuration is small, its size has a tiny impact on the results.\end{itemize}- Abstract document
- Manuscript document
(absent)