[time-nuts] Turning off PPS when not enough satellites
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Aug 1 10:27:47 UTC 2006
In message <63849.212.181.149.145.1154423937.squirrel at webmail.lysator.liu.se>,
bg at lysator.liu.se writes:
>On Tue, August 1, 2006 10:56, Ulrich Bangert said:
>
>> Note that any gps receiver can not be really good for
>> timing and navigation at the same time, so all navigation receivers make
>> bad timing receivers.
>
>I am interested in your arguments for the above statement. Please elaborate!
The above statement should probably be read as:
"If you solve for both position and time you get worse time than if
you hold the position constant and solve only for time"
In other words, it has nothing to do with the receiver, it's about
what you ask it to do.
Not all receivers can do "position hold" mode of course.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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