HEPL, Stanford University, Stanford, California 94305-4085, USA.
Phys Rev Lett. 2011 Jun 3;106(22):221101. doi: 10.1103/PhysRevLett.106.221101. Epub 2011 May 31.
Gravity Probe B, launched 20 April 2004, is a space experiment testing two fundamental predictions of Einstein's theory of general relativity (GR), the geodetic and frame-dragging effects, by means of cryogenic gyroscopes in Earth orbit. Data collection started 28 August 2004 and ended 14 August 2005. Analysis of the data from all four gyroscopes results in a geodetic drift rate of -6601.8±18.3 mas/yr and a frame-dragging drift rate of -37.2±7.2 mas/yr, to be compared with the GR predictions of -6606.1 mas/yr and -39.2 mas/yr, respectively ("mas" is milliarcsecond; 1 mas=4.848×10(-9) rad).
“引力探测器 B”于 2004 年 4 月 20 日发射，是一项在地球轨道上使用低温陀螺仪测试爱因斯坦广义相对论（GR）两个基本预测的空间实验，这两个预测分别是测地线效应和框架拖拽效应。数据收集始于 2004 年 8 月 28 日，结束于 2005 年 8 月 14 日。对四个陀螺仪的数据进行分析得出的测地线漂移率为-6601.8±18.3 mas/yr，框架拖拽漂移率为-37.2±7.2 mas/yr，分别与 GR 的预测值-6606.1 mas/yr 和-39.2 mas/yr 进行比较（“mas”是毫角秒；1 mas=4.848×10(-9) rad）。
