广义相对论效应以离地球引力场无限远去为基准，地面时钟每天慢60050^-10 ，可是在这篇重要资料中却仅有如下文字，不知你是如何得出“GPS已经算入了引力钟慢”结论的？

In Einstein’s theory of general relativity (GR), gravitational potential changes the rate of a clock by the factor (1 - GM_?/b> / Rc²) , where G = gravitational constant, M_?/sub> = mass of Earth, R = distance of clock from center of Earth, and c = speed of light. A similar but much smaller effect caused by the change in gravitational potential of the Sun across the orbit of a GPS satellite will be discussed in the analysis section. For now, this will be neglected. Adopting a mean value for R = 26,560,000 m for all GPS satellites and taking the other constants from Table 7, their rate slowing due to Earth’s gravitational potential is 1.67x10^-10 relative to clocks at infinity. The rate slowing due to Earth’s gravitational potential for a clock located on the Earth’s geoid, say, at the north pole where R = 6,357,000 m, is 6.98x10^-10 relative to clocks at infinity. Since clocks on the Earth’s geoid are used to define the international standard second of time, GPS satellite clocks run fast relative to ground clocks by the difference of these two factors, 5.31x10^-10. So satellite atomic clocks are rate-adjusted downward before launch by that factor, resulting in clocks in orbit that tick at the same average rate as ground clocks. Because this compensation is complete for the mean altitude of GPS satellites, the GR effect on the GPS system can essentially be ignored.