Attached a paper on this topic from my old colleagues.

Ricky

On 6/14/2021 1:18 PM, Gary E. Miller wrote:
> Yo Nathan!
>
> On Mon, 14 Jun 2021 12:13:55 -0700
> Nathan Owens <nathan@nathan.io> wrote:
>
>> I am able to buy the same chip, the uBlox M8Q as hat:
>> https://www.amazon.com/MAX-M8Q-Raspberry-Multi-Constellation-Receiver-Support/dp/B08HJFYPGX/
> Yeah, I saw that.  Looks good, but no reports on it yet. u.fl is OK,
> but a PITA.  The antenna does not specify it works with Galileo.  You
> want at least 15MHz to 20 Mhz for Galileo E1.  A "GPS" antenna is often
> not good enough.  A good antenna would be marked as good for Galileo.
> GLONASS needs a much wider bandwidth, but timing people turn off the
> GLONASS as unstable.
>
> For the price you can buy a better antenna if required.
>
> 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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