CLOCK sync

Discussion in 'GPS Technical Discussion' started by PAGOVIND, Nov 20, 2019.

  1. PAGOVIND

    PAGOVIND

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    How is user clock is synchronized with satellite clock to determine the transit time of the signal
     
    PAGOVIND, Nov 20, 2019
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  2. PAGOVIND

    johnl

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    AFAIK, the user time is treated as a free variable, like the user position. That's why at least four GPS satellites are needed. Or are you asking something else?
     
    johnl, Nov 28, 2019
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  3. PAGOVIND

    Nuvi-Nebie Moderator

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    From time to time questions of this sort pop up on this forum, I have to say that even if I was capable of explaining these questions myself (which I am not), I wouldn't do so because you get the impression that you are being asked to complete a student's homework for them, however, in this case as Johnl has hinted at, the pseudorange (distance to) each satellite and the 'real' time is calculated simultaneously by using data from 4 or more satellites, the formulae are detailed in Bewitt's Basics of GPS, starting at page 13, I'm guessing that this is what the lecturer is asking the student to find
     
    Nuvi-Nebie, Nov 28, 2019
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