On Mar 25, 2024, at 7:16 PM, Gary E. Miller <gem@rellim.com> wrote:Yo Frank!
On Mon, 25 Mar 2024 19:05:56 -0400
Frank Nicholas <frank@nicholasfamilycentral.com> wrote:Without a reference to data published in a peer-reviewed journal,
I'm skeptical :-) It's certainly possible L5 is quieter.
L5 is 30 years after L2, they learned a lot in that time.
You don't need a peer reviewed paper, just look at the protocol. Faster
chip rate, stronger RF, better modulation, faster data rate.
Strictly for time keeping in my home/home lab, any benefit of replacing this:
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With this:
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(Note that I’d probably also have to replace my L1/L2 antenna…)
I’m in the country (not urban dwelling), and other than a few neighbor WiFi signals, I don’t see much other radio signals. I actively collect/share ADS-B data with FlightRadar24 (not generally related to GPS) with an SDR, so I monitor the spectrum.
Perhaps someone can get data out of an F9, which I think can measure
noise levels, with a L1/L2/l5 antenna, in a statistically valid
sample of urban locations. Or use a spectrum analyzer.
Does the F9 support L5? I don’t think I’ve seen L5 support
advertised for any of the boards I’ve looked at.
The F9P, F9T and D9S support L5. Check out the u-blox line card:
https://www.u-blox.com/sites/default/files/GNSS_LineCard_UBX-13004717.pdf
Doesn’t surprise me, but I wonder about the price, and I haven’t seen any breakout boards or pucks that includes those versions.
RGDS
GARY
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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