Hi The Trimble empire here (NetRS’s and NetR8) seem to be reasonably happy with everything. I haven’t dug into any of the data. They all show L2C tracking along like normal.
Bob > On Mar 8, 2018, at 9:23 PM, J. Grizzard <elfchief-timen...@lupine.org> wrote: > > I got a message from the Swiftnav support folks yesterday (I have a piksi > multi amongst my little fleet of GPSen) because they had an emergency > firmware patch to their kit because of a change in the L2C signal was giving > them issues. (Props to them for getting a firmware update out in ~12 hour, > too) > > After a little bit of inquiring, it looks like what happened is that > yesterday, the L2 CNAV message started marking all of the L1 signals as > unhealthy. If a device actually listens to this health signal (apparently > their GPS did), suddenly most GPS satellites become unusable (with the only > remaining ones being ones that aren't transmitting an L2C signal). > > (According to NANU 2014039, you shouldn't be using those health indicators, > though it does also say that the L1 health indicators would all indicate > "healthy", so this seems to be a departure from their stated plan.) > > Anyhow, probably doesn't affect anyone here, but I thought it was > interesting. Sadly, I can't see what's actually being transmitted, since my > only pieces of kit that can decode L2C are my piksi (which won't give me raw > NAV/CNAV, and they apparently have zero interest in adding that > functionality), and the Novatel OEM628 that I picked up off eBay last year > ... which crashes every 20 or 30 minutes if I ask it to decode L2C. Argh. > > (Maybe u-blox's upcoming kit will be affordable(ish) and have good raw CNAV > output... I can hope, right?) > > -j > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
