The transformation between τ and TCB for deep space missions under IAU resolutions  

作　　者：Xue-Mei Deng 

机构地区：[1]Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008, China

出　　处：《Research in Astronomy and Astrophysics》2012年第6期703-712,共10页天文和天体物理学研究（英文版）

基　　金：funded by the National Natural Science Foundation of China (Grant Nos. 11103085 and 11178006)

摘　　要：For tracking spacecraft and performing radio science, the transformation between the proper time （τ） given by a clock carried onboard a spacecraft and the barycentric coordinate time （TCB） is investigated under IAU resolutions. In order to more clearly demonstrate manifestations of a physical model and improve computa- tional efficiency, an analytic approach is adopted. After numerical verification, it is confirmed that this method is adequate to describe a Mars orbiter during one year, and is particularly good at describing the influence from perturbing bodies. Further analyses demonstrate that there are two main effects in the transformation： the gravi- tational field of the Sun and the velocity of the spacecraft in the barycentric coordinate reference system. The combined contribution of these effects is at the level of a few sub-seconds.For tracking spacecraft and performing radio science, the transformation between the proper time （τ） given by a clock carried onboard a spacecraft and the barycentric coordinate time （TCB） is investigated under IAU resolutions. In order to more clearly demonstrate manifestations of a physical model and improve computa- tional efficiency, an analytic approach is adopted. After numerical verification, it is confirmed that this method is adequate to describe a Mars orbiter during one year, and is particularly good at describing the influence from perturbing bodies. Further analyses demonstrate that there are two main effects in the transformation： the gravi- tational field of the Sun and the velocity of the spacecraft in the barycentric coordinate reference system. The combined contribution of these effects is at the level of a few sub-seconds.

关 键 词：reference systems -- time -- method： analytical -- method： numerical-- space vehicles 

分 类 号：O242.23[理学—计算数学] P1[理学—数学]