[time-nuts] GPS backup for the stationary time and frequencyuser

[J. Forster]

KISS. This seems like a lot of work for not particularily good results.
Among other things, you have no closure so no measure of how good your
measuremwent is.

FWIW,

-John

================


>
> On Oct 8, 2010, at 10:27 AM, J. Forster wrote:
>> GPS needs several birds to lock up,
>
> To get a position fix, this is true; 3 birds minimum for a 2D fix, 4 birds
> minimum for a 3D fix.
>
>
>> and if you look at a single bird, Dopplar will make the signal useless
>> as
>> a frequency reference.
>
> Only if you don't already know your position. Once your position has been
> determined accurately and you have the current ephemeris data for the bird
> you're listening to, you can factor out the predictable doppler and use a
> single bird for timing and frequency.
>
>
>
> --
> Mark J. Blair, NF6X <nf6x at nf6x.net>
> Web page: http://www.nf6x.net/
> GnuPG public key available from my web page.
>
>
>
>
>
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