[gpsd-dev] refclock 28 gone wacky on me

[Mike]

On 06/10/2016 03:17 PM, Gary E. Miller wrote:
> Yo Eric!
>
> On Fri, 10 Jun 2016 03:49:22 -0400
> "Eric S. Raymond" <esr at thyrsus.com> wrote:
>
>> That's... very weird.  I've never seen it happen.
> But it would explain some old complaints.
>
> Now that we know which Skytraq option it is, I recall always selecting
> the workaround.
>
>> It sounds as though for some crazy reason the GPS is delivering the
>> PPS pulse late.
> Not late, as such.  Late in the second, but the time stamp of the
> fix (xxX.940) is pretty close to when actually sent.
>
>> I'm hard put to imagine how gpsmon could screw this up.
> Or Hal with his O-scope.
>
> RGDS
> GARY
I'm seeing this happen now, PPS is good NMEA is off nearly half a 
sec...  NMEA delivery viewed in gpsmon is 0.011 after top of second.

*SHM(1)          .PPS.            0 l   10   16  377    0.000 -0.002   0.004
-SHM(0)          .GPS.            0 l    9   16  377    0.000 -496.59   
6.661

sample NTP0 1466365999.284354339 1466365999.212852562 
1466365999.012000083 0  -1
sample NTP1 1466365999.286413275 1466365999.000001179 
1466365999.000000000 0 -20
sample NTP0 1466365999.785199770 1466365999.595461668 
1466365999.012000083 0  -1
sample NTP1 1466365999.786913717 1466365999.000001179 
1466365999.000000000 0 -20
sample NTP0 1466366000.286105199 1466366000.203742759 
1466366000.012000083 0  -1
sample NTP1 1466366000.287910142 1466366000.000005092 
1466366000.000000000 0 -20
sample NTP0 1466366000.786555642 1466366000.588773790 
1466366000.012000083 0  -1
sample NTP1 1466366000.788280588 1466366000.000005092 
1466366000.000000000 0 -20
sample NTP0 1466366001.287075083 1466366001.194299967 
1466366001.012000083 0  -1
sample NTP1 1466366001.288849027 1466366001.000005006 
1466366001.000000000 0 -20
sample NTP0 1466366001.787245534 1466366001.579234001 
1466366001.012000083 0  -1
sample NTP1 1466366001.788960481 1466366001.000005006 
1466366001.000000000 0 -20