# The speed of a gps satellite ie the atomic clock

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Unformatted text preview: and con4nually transmits radio signals that include the precise &amp;me and its posi&amp;on in space. •  When a receiver on the ground picks up the signals from four satellites, the receiver can calculate its own posi&amp;on (by measuring the &amp;me delay between when each signal was emi7ed and when it was received). h7p://2.bp.blogspot.com/ ­D6m_XspHsPw/UG4LrckLk8I/AAAAAAAAKAg/ vJfGXv8IHNo/s1600/GPS ­constella4on.jpg Reference: Hart ­Davis, A. (2009). Science: The Deﬁni.ve Visual Guide. London, U.K.: Dorling Kindersley. h7p:// 3.bp.blogspot.co m/ ­ h9YWahc383M/ T0PPbmNNlII/ AAAAAAAAAmU/ xFJNCUzG ­cc/ s1600/gps ­ triangula4on.jpg 15 GPS and Rela.vity 16 h7p://www.youtube.com/watch?v=zQdIjwoi ­u4 How an Atomic Clock Works? h7p://www.youtube.com/watch?v=p2BxAu6WZI8 17 Special Rela4vity Employed in GPS According to Special Rela&amp;vity: •  A moving clock &amp;cks slower. •  The speed of a GPS satellite (i.e., the atomic clock onboard) in orbit is 3.9 km/s. •  In 1 s, the clock 4cks slower...
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## This document was uploaded on 03/22/2014.

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