伽利略卫星偏心轨道引力红移的检验
Test of the Gravitational Redshift with Galileo Satellites in an Eccentric Orbit
摘要：
2014年8月22日，欧洲GNSS伽利略卫星系统的GSAT-0201和GSAT-0202被意外发射到偏心轨道。出乎意料的是，这已经成为一个幸运的科学机会，因为船上的氢脉泽允许对广义相对论预测的红移进行敏感的测试。在本信中，我们描述了对这些卫星（包括三个不同的时钟）大约三年数据的分析。对于其中之一，我们确定的测试参数量化的引力红移和相对论多普勒频移的综合效应的潜在违规。与1976年重力探测器A获得的值相比，我们的结果的不确定性减少了4倍以上。
英文摘要：
On August 22, 2014, the satellites GSAT-0201 and GSAT-0202 of the European GNSS Galileo were unintentionally launched into eccentric orbits. Unexpectedly, this has become a fortunate scientific opportunity since the onboard hydrogen masers allow for a sensitive test of the redshift predicted by the theory of general relativity. In the present Letter we describe an analysis of approximately three years of data from these satellites including three different clocks. For one of these we determine the test parameter quantifying a potential violation of the combined effects of the gravitational redshift and the relativistic Doppler shift. The uncertainty of our result is reduced by more than a factor 4 as compared to the values of Gravity Probe A obtained in 1976.
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