[time-nuts] ublox NEO-M8T improved by insulated chamber?
Gary E. Miller
gem at rellim.com
Wed Nov 8 16:45:10 UTC 2017
Yo jimlux!
On Wed, 8 Nov 2017 06:33:19 -0800
jimlux <jimlux at earthlink.net> wrote:
> On 11/7/17 8:39 PM, Gary E. Miller wrote:
> > Yo Tom!
> >
> > On Tue, 7 Nov 2017 20:16:09 -0800
> > "Tom Van Baak" <tvb at LeapSecond.com> wrote:
> >
> >>> Which is small compared to the published GPS time resolution
> >>> (IS_GPS_200H, page 54) of 90 ns.
> >>
> >> Correct. GPS performs far better than the original spec. Like the
> >> Mars rovers...
> >
> > Of course, but then you are on a wing and a prayer, not
> > engineering.
>
> Not really - the original spec for GPS was based on being able to
> track to a single chip of the PN code at 1 MHz, or about 300m
> position error, and 30m for the precise code at 10MHz.
I agree with almost all you ssid. And none of it applies to the point I
made. I'm talking about the current GPS standard (IS-GPS-200H), nothing
dated at all. No one here has yet bothered to address the issues I raise
in Section 3.3.4. What I say about 3.3.4 is perfectly compatible with with
your arguments.
I'll be happy to discuss my interpretation of 3.3.4 and what I think it
means, when someone shows they actually read it.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem at rellim.com Tel:+1 541 382 8588
Veritas liberabit vos. -- Quid est veritas?
"If you can’t measure it, you can’t improve it." - Lord Kelvin
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