Yo Eric! On Tue, 25 Apr 2017 18:59:44 -0400 "Eric S. Raymond via devel" <[email protected]> wrote:
> Hal Murray <[email protected]>: > > > > [email protected] said: > > > We can't fix *that*, either. All we can do is add a warning to > > > the man pages for NMEA-related drivers that if your GPS is older > > > than 1024 weeks you may be cruising for a bruising. I think I'll > > > go do that. > > > > We need to find out when they added the 3 extra bits. > > That is messy. IIRC they came in with the Block III version of the > sats, but (a) I think Block IIs are still flying, and (b) we don't > know whether or when receiver firmware has been updated by anybody. > Of course this is never documented. I think only some Block II output CNAV, and only then on the L2 and L5 bands which are not used in consumer GPS. You GPS only needs to get a CNAV message now and again to know the proper GPS epoch, so you only need a few birds transmitting it. Until there are a lot of Block III's in service I do not expec to see any L1C band GPS. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 [email protected] Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can’t measure it, you can’t improve it." - Lord Kelvin
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