Re: SparkFun GNSS L1/L5 Breakout - NEO-F10N, SMA - GPS-24114 - SparkFun Electronics

[Gary E. Miller]

Yo Greg!

On Mon, 25 Mar 2024 19:50:09 -0400
Greg Troxel <gdt@lexort.com> wrote:

> "Gary E. Miller" <gem@rellim.com> writes:
> 
> > You don't need a peer reviewed paper, just look at the protocol.
> > Faster chip rate, stronger RF, better modulation, faster data rate.
> >  
> 
> Some of that says it ought to work better, and faster data rate says
> it ought to work less well.  I believe it is highly likely better.
> But that's different from someone actually measuring it.

This topic started off about time keeping receivers.  Any u-xlox
8 or above will perform the same in timekeeping.  They are all better
than the 50 ns a Pi can measure.

OTOH, if you have an atomic standard, you can tell.

> And, the blurb says it is because of better spectrum protection, not
> because of signal structure and power.   That I  am particularly
> skeptical of.

The US Military designed the GPS signal to be very hard to find, unless
you new the tricks.  On obfuscation was putting GPS L2 is a band reserved
for other uses.  If someone with the right to the band interferes with
GPS, there is nothing anyone can do about it.

OTOH, the L5 is reserved for GPS, and anyone interfering can be fined.

But as a practical matter, it has never been a problem.  Those Russian,
and trucker, jammers are a problem.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@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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