To answer Jason's question about checksum, no I don't think we check it. We probably should.
Also: APRS _can_ have increased resolution: Use APRS compressed mode. I used to do that a lot, and it gives you precision of about a 2' by 3' rectangle. On Thu, Apr 11, 2019 at 1:02 PM Tom Russo <[email protected]> wrote: > I should point out that these updates only refer to handling of attached > location receivers, and do not add support for raw NMEA posits as Jason > had suggested. It should not be super difficult to add that support, but > it isn't done yet. > > On Thu, Apr 11, 2019 at 01:58:30PM -0600, we recorded a bogon-computron > collision of the <[email protected]> flavor, containing: > > GNSS, GLONASS, Beidou, and Gallileo support is no on the main branch of > > the Xastir repo, no fork needed. Update your clone, and you should be > able > > to use Xastir with multi-constellation receivers now. So far it has > only been > > tested with GPS and GNSS receivers, but it should work with all the > others. > > > > If you try it and it doesn't work, please open a bug report on GitHub, > and > > we'll run it to ground. > > > > On Wed, Apr 10, 2019 at 10:56:38PM -0600, we recorded a bogon-computron > collision of the <[email protected]> flavor, containing: > > > Turns out that the GNGGA/GNRMC vs. GPGGA/GNGGA issue is the reason for > > > the newly opened issue #53 on github ( > https://github.com/Xastir/Xastir/issues/53), > > > and I believe I have it fixed with pull request #58 ( > https://github.com/Xastir/Xastir/pull/58) > > > > > > If any users with GLONASS receivers that emit GNGGA/GNRMC sentences > (such > > > as the DRAWS hat for Raspberry Pi) would like to test it out, > > > you can get it via: > > > > > > cd <your clone> > > > git checkout master > > > git checkout -b tvrusso-feature-supportglonass master > > > git pull https://github.com/tvrusso/Xastir.git > feature-supportglonass > > > > > > Then rebuild Xastir and try it out. > > > > > > The more folks I can get testing this the better. I won't merge to > master > > > until I at least confirm that it helps the GN vs. GP thing. As far as > I can > > > tell so far, I haven't borken it for GP. > > > > > > On Sun, Dec 02, 2018 at 02:52:06PM -0600, we recorded a > bogon-computron collision of the <[email protected]> flavor, containing: > > > > I just started playing with a u-blox 8 family GPS. It's capable of > > > > receiving multiple GNSS simultaneously. At first glance this unit > doubles > > > > the number of available satellites just because it's listening to > GLONASS > > > > and GPS at the same time. > > > > > > > > Of course there's a downside. In APRS-land we're used to dealing > with a > > > > single "talker ID" that indicates we're dealing with GPS (the name > of the > > > > US system) - that's the "GP" in GPGGA and GPRMC. This system uses GN > as the > > > > talker ID when it's listening to multiple systems. I can configure > it to > > > > use GPS only and get my familiar GPGGA, but I stop listening to a > bunch of > > > > available satellites when I do that. > > > > > > > > Since APRS has limited resolution we (APRS users) wouldn't benefit > much > > > > from increased accuracy, but we would get something from having a > much > > > > larger constellation available. > > > > > > > > Has anyone messed with these multi-GNSS receivers? Are the benefits > that > > > > seem obvious at first glance real? > > > > > > > > Would it be appropriate to think about code changes to Xastir (or > other > > > > clients but i don't use those) to use G[PLABN]GGA or G[PLABN]RMC > instead of > > > > restricting ourselves to GP only? There would be 2 cases here, once > for the > > > > attached GPS interface to determine our position, and the GPGGA APRS > packet > > > > type. I'm actually considering using GGA and RMC packets to get > increased > > > > resolution on a non-144.39 tracking application. > > > > > > > > Does xastir verify the NMEA checksum from an attached GPS? > > > > > > > > -Jason > > > > kg4wsv > > > > _______________________________________________ > > > > Xastir mailing list > > > > [email protected] > > > > http://xastir.org/mailman/listinfo/xastir > > > > > > -- > > > Tom Russo KM5VY > > > Tijeras, NM > > > > > > echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z] > [n-z][a-m] > > > > -- > > Tom Russo KM5VY > > Tijeras, NM > > > > echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z] > [n-z][a-m] > > -- > Tom Russo KM5VY > Tijeras, NM > > echo "prpv_a'rfg_cnf_har_cvcr" | sed -e 's/_/ /g' | tr [a-m][n-z] > [n-z][a-m] > > _______________________________________________ > Xastir mailing list > [email protected] > http://xastir.org/mailman/listinfo/xastir > -- Curt, WE7U http://we7u.wetnet.net http://www.sarguydigital.com _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
