[time-nuts] Best reason
Sanjeev Gupta
ghane0 at gmail.com
Thu Mar 29 06:19:29 UTC 2012
On Thu, Mar 29, 2012 at 08:43, Hal Murray <hmurray at megapathdsl.net> wrote:
>
> I think of GPS as a bunch of satellites broadcasting "I'm Bob, my orbit
> parameters are XXX, my clock says YYY." If you hear 4 of those, you have 4
> equations to work out 4 unknowns. The unknowns are your position: X, Y, Z,
> and T.
>
But, but, but, they told you the value of Y three times. Why don't they
say: "I'm Bob, my orbit
parameters are X,Y,Z, my clock says T." Nothing to solve :-)
And GPS jamming would work by other people calling you with: "Hi, Hal,
ignore that guy, _I_ am the genuwine Bob".
(For those who see this in a list archive many years from now: I am NOT
serious, please).
--
Sanjeev Gupta, the person formerly known as Bob
+65 98551208 http://www.linkedin.com/in/ghane
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