中国空间科学技术
Quaternion Method with Modified Constraint Equation for Nonsingular Orbital Elements
WEI Peng-Xin, JING Wu-Xing, GAO Chang-Sheng
Chinese Space Science and Technology . 2012, (1): 66 -71 .  DOI: 10.3780/j.issn.1000-758X.2012.01.010