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" <e...@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
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