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] _______________________________________________ Xastir mailing list [email protected] http://xastir.org/mailman/listinfo/xastir
