Re: ✘TSIPv1 12 hour plot

[Gary E. Miller]

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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