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With the timing information and the ephemerides from 4 satellites, a GPS receiver can perform trilateration, which allows a point to be plotted accurately to within about 5 to 15 meters (15 to 45 feet).— Ars Technica
Quot capita, tot ephemerides (Quidquid latine dictum sit, altum videtur).— Blogs are like opinions. Everybody has one...
He published a series of ephemerides, beginning in 1659.— A Budget of Paradoxes, Volume I (of II)
As these ephemerides are published several years in advance, there would be plenty of time for navigators to become familiar with the proposed change in time-reckoning before they were called upon to employ it in their calculations I believe that they would soon come to think it more convenient and natural to reckon according to civil time than according to the present astronomical time.— International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884. Protocols of the Proceedings

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