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Re: ✘TSIPv1 12 hour plot
From: |
Gary E. Miller |
Subject: |
Re: ✘TSIPv1 12 hour plot |
Date: |
Sun, 13 Feb 2022 13:08:58 -0800 |
Yo Greg!
On Sun, 13 Feb 2022 15:13:43 -0500
Greg Troxel <gdt@lexort.com> wrote:
> "Gary E. Miller" <gem@rellim.com> writes:
>
> > Seee attached 12 hour gpsprof plot from a new Trimble RES720 using
> > the new TSIPv1 protocol. The RES720 routinely uses 40 or more
> > "satellites" from an indoor antenna, and start up alsmost
> > instantly. Sadly it has no Battery Back Ram (BBR) so you setill
> > need to wait for the UTC offset to arrive in an Almanac subframe.
> >
> > I say "satellites" because this is a multifrequency part, L1 and L5,
> > plus multi GNSS (GPS, GLONASS, Beidou, Galileo, etc.). gpsd counts 2
> > signals from one satellite as two "used satellites".
>
> Interesting to have an L1/L5 part but not L2. I have never seen that
> before.
Yes, pretty new. L5 was only marked "healthy" in the last few months,
and still does not have a full constellation. That is scheduled for
2027.
But L5 makes sense. The L5 signal is stronger than the L2 signal, and
has a higher data rate of subframes.
> roger the request to start testing.
Thanks.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
gem@rellim.com Tel:+1 541 382 8588
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"If you can't measure it, you can't improve it." - Lord Kelvin
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