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

本项目为Geodätisches Wettzell天文台（GOW）引入了精确光学时钟“SOC2”。这是一个基于晶格捕获88Sr原子的时钟。时钟性能、可靠性和健壮性将在项目的前两年得到改进。然后，时钟将被转移到GOW，在那里它将与单反系统集成，通过ELT链路将光学时间传输到ACES。它还将集成GOW定时系统和ACES微波链路。目标是在2025年以后的一系列测量活动中，以高精度（1×10^−17）操作时钟，间隔时间约为1周。目标是通过与PTB光学时钟的反复比较，首次演示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。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).