Interesting NMEA WNRO quirk

[Hal Murray]

Anybody seen this yet?  (I assume not, or it would have been fixed.)

Has the new ntp_wrapdate.c been tested?  Should the warp be positive or 
negative?

This is on a 32 bit system.  The GPS chip is a MTK-3301

ntpq -p shows:
xNMEA(0)          .GPS.            0 l   29   64  377   0.0000 59184000009  
24.7495

ntpd.log shows:

26 Jul 13:43:10 ntpd[714]: NMEA(0) serial /dev/gps0 open at 9600 bps
26 Jul 13:43:11 ntpd[714]: PROTO: NMEA(0) 801b 8b clock_event clk_bad_format
26 Jul 13:43:11 ntpd[714]: NMEA(0) Changed GPS epoch warp to -4096 weeks
26 Jul 13:44:10 ntpd[714]: PROTO: NMEA(0) 8014 84 reachable

58691 2651.935 127.127.20.1 $GPRMC,004411.000,A,3726.1087,N,12212.2399,W,0.00,2
.07,111299,,,A*77  384 64 0 0 64 0

-------

It was working May 22.
58625 67186.457 127.127.20.1 $GPRMC,183945.000,A,3726.0859,N,12212.2567,W,0.00,
339.73,220519,,,A*7E  448 64 0 0 64 0

I don't have clockstats for May 23.

It's broken on May 24:
58627 1967.044 127.127.20.0 $GPRMC,003249.561,V,8960.0000,N,00000.0000,E,0.00,0
.00,081099,,,N*76  48 0 12 0 12 0
58627 86343.440 127.127.20.1 $GPRMC,235902.000,A,3726.0912,N,12212.2418,W,0.00,
173.06,081099,,,A*7E  384 64 0 0 64 0


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