Chinese Space Science and Technology ›› 2021, Vol. 41 ›› Issue (3): 70-81.doi: 10.16708/j.cnki.1000.758X.2021.0040
JIANG Ping，ZHANG Yasheng*，TAO Xuefeng，XU Can，FANG Yuqiang，LI Zhi，WANG Hao
The initial orbit determination is important to cataloging the space objects. It is challenging to determine the initial orbit using optical anglesonly observations effectively. A prominent method to solve the shortarc problem is to correlate and match the shortarcs obtained at different times to find observations from the same object. Based on the admissible region, the minimum error between the predicted sequence and the actual observation sequence was calculated by finding the optimal orbit to fit multiple optical observations. Then, based on the study of the statistical characteristics of observation errors, the feasibility of the linearized error propagation method in applying shortarc observations was theoretically verified and a reasonable error limit was given. The chisquare test was used to determine the correlation between shortarcs. At the same time, the results applying the proposed shortarc correlation analysis method to LEO, HEO, MEO and GEO orbits were given. The difficulty of applying in the longinterval loworbit object observations was described. Aiming at resolving this difficulty, a method was proposed to improve the loworbit observations association using the error characteristic law of the angle predicted value. The results show that the success rate of correlation recognition for LEO shortarc observations has increased from 87% to 99%.
JIANG Ping, ZHANG Yasheng, TAO Xuefeng, XU Can, FANG Yuqiang, LI Zhi, WANG Hao. Short-arc correlation analysis method based on optical observations only[J]. Chinese Space Science and Technology, 2021, 41(3): 70-81.
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