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arXiv 2406.16147astro-ph.EPastro-ph.IMgr-qc
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太阳系质心、地球与月球之间的相对论时间变换

Relativistic Time Transformations Between the Solar System Barycenter, Earth, and Moon

Slava G. Turyshev, James G. Williams, Dale H. Boggs, Ryan S. Park

AI总结:

本文推导了月球表面时间尺度(TL)与地球时间(TT)的相对论变换,量化了长期漂移与周期项,并计算了月心坐标的空间尺度与Lorentz contraction,在JPL星历软件中实现了亚纳秒级精度,为地月空间导航与科学操作提供了稳健框架。

摘要:

为了考虑引力势和相对运动的差异,相对论修正在地心、太阳系质心和月心参考系之间的时间变换中是必不可少的。作为地球系统的主参考,Terrestrial Time (TT) 为跨时空框架的精确同步提供了基础。为确保与 TT 的一致性,Barycentric Dynamical Time (TDB) 必须表现出与 TT 无平均速率差。尽管 International Astronomical Union (IAU) 已制定了 TT 和 TDB 之间变换的决议,但扩展这些框架以定义月球表面时间尺度 (TL) 对推进月球探索至关重要。本文推导了 (TL - TT) 变换,量化了 56.0256 us/day 的长期漂移和周期项,其中最大振幅在平均近点周期时约为 0.470 us。此外,计算了兼容 TT 的空间尺度和月心位置坐标的 Lorentz contraction,实现了亚纳秒级的授时精度。这些变换在 JPL ephemeris generation software 中实现,为月球授时的高保真相对论模型提供了稳健框架,支持地月空间导航、通信和科学操作。

英文摘要:

Relativistic corrections are essential for time transformations between geocentric, solar system barycentric, and luni-centric reference systems to account for differences in gravitational potential and relative motion. As the primary reference for Earth-based systems, Terrestrial Time (TT) provides the foundation for precise synchronization across spatial and temporal frameworks. To ensure consistency with TT, Barycentric Dynamical Time (TDB) must exhibit no average rate difference from TT. Although the International Astronomical Union (IAU) has established resolutions for transformations between TT and TDB, extending these frameworks to define a lunar surface time scale (TL) is essential for advancing lunar exploration. This paper derives the (TL - TT) transformation, quantifying a secular drift of 56.0256 us/day and periodic terms, with the largest amplitude of ~0.470 us at the mean anomalistic period. Additionally, the TT-compatible spatial scale and Lorentz contraction of Moon-centered positional coordinates are computed, achieving sub-nanosecond timing precision. These transformations, implemented in JPL ephemeris generation software, provide a robust framework for high-fidelity relativistic models of lunar timekeeping, enabling further refinements and supporting navigation, communication, and scientific operations in cis-lunar space.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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