[time-nuts] over-determined clock solution

[Hal Murray]

steve65 at suddenlink.net said:
> The phrase "over-determined clock solution" is used in the Trimble
> Thunderbolt user manual in describing operation of the Thunderbolt GPS
> receiver.  

> What does "over-determined clock solution" mean?

You are trying to solve for X, Y, Z, and T.  (or the polar equivalents)  4 
unknowns takes 4 equations.  You get one equation from each satellite, so you 
need 4 satellites to get an answer.

If you have more satellites, you have more information than you need, hence 
the solution is over-determined.


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