Performance optimization of the optical clock “SOC2”, installation and operation at Wettzell for geodesy and fundamental physics studies

该项目将精确的光学钟“SOC 2”引入到Wettzell大地测量观测站（GOW）。这是一个基于晶格捕获的88Sr原子的时钟。时钟性能、可靠性和鲁棒性将在项目的前两年得到改善。然后，时钟将被传送到GOW，在那里它将与SLR系统集成，以便通过ELT链路将光学时间传送到ACES。它还将与GOW授时系统和ACES微波链路相结合。目标是从2025年起，在一些测量活动中，以大约1周的时间间隔以高精度（1×10^−17）运行时钟。通过与PTB的光学钟反复比较，目标是通过光学链路在大地测量学和相对论大地测量学中使用精确时间传递的第一个演示。另一个目标是测试引力时间膨胀（GTD）的普遍性。

This project introduces the accurate optical clock “SOC2” to the Geodätisches Observatorium Wettzell (GOW). This is a clock based on lattice-trapped 88Sr atoms. The clock performance, reliability, and robustness will be improved during the first two years of the project. Then, the clock will be transferred to GOW, where it will be integrated with the SLR system for optical time transfer to ACES via the ELT link. It will also be integrated with the GOW timing system and the ACES microwave link. The goal is to operate the clock with high accuracy (1×10^−17) for intervals of approximately 1 week duration, in a number of measurement campaigns from 2025 onwards. Goals are the first demonstration of the use of precise time transfer in geodesy and relativistic geodesy via optical link, by repeated comparisons with the optical clocks at PTB. Another goal is a test the universality of gravitational time dilation (GTD).