{"paper":{"title":"Testing gravitational redshift based on microwave frequency links onboard China Space Station","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["gr-qc","physics.geo-ph"],"primary_cat":"astro-ph.IM","authors_text":"Abdelrahim Ruby, An Ning, Chenghui Cai, Kuangchao Wu, Lei Wang, Lihong Li, Mostafa Ashry, Pengfei Zhang, Rui Xu, Wei Xu, Wenbin Shen, Xiao Sun, Yifan Wu, Ziyu Shen","submitted_at":"2021-12-06T03:22:36Z","abstract_excerpt":"In 2022 China Space Station (CSS) will be equipped with atomic clocks and optical clocks with stabilities of $2 \\times 10^{-16}$ and $8 \\times 10^{-18}$, respectively, which provides an excellent opportunity to test gravitational redshift (GR) with higher accuracy than previous results. Based on high-precise frequency links between CSS and a ground station, we formulated a model and provided simulation experiments to test GR. Simulation results suggest that this method could test the GR at the accuracy level of $(0.27 \\pm 2.15) \\times10^{-7}$, more than two orders in magnitude higher than the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2112.02759","kind":"arxiv","version":3},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2112.02759/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}