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[gpsd-dev] Disturbing numbers


From: Eric S. Raymond
Subject: [gpsd-dev] Disturbing numbers
Date: Sat, 2 Nov 2013 02:10:37 -0400 (EDT)

Here are some numbers I collected through a GR601-W while trying to
write code to plot sytem clock difference from PPS. Columns are:

1 Real second (GPS time of last PPS)
2 Real nanosecond (definitionally 0)
3 System clock second
4 System clock nanosecond

Yes, the same data as in the PPS JSON report.

1383365763      0       1383365761      657868000
1383365764      0       1383365762      657867000
1383365765      0       1383365763      657869000
1383365766      0       1383365764      657868000
1383365767      0       1383365765      657865000
1383365768      0       1383365766      657867000
1383365769      0       1383365767      657863000
1383365770      0       1383365768      657867000
1383365771      0       1383365769      657866000
1383365772      0       1383365770      657866000
1383365773      0       1383365771      657867000
1383365774      0       1383365772      657868000
1383365775      0       1383365773      657869000
1383365776      0       1383365774      657868000
1383365777      0       1383365775      657870000
1383365778      0       1383365776      657871000
1383365779      0       1383365777      657865000
1383365780      0       1383365778      657868000
1383365781      0       1383365779      657871000
1383365782      0       1383365780      657870000
1383365783      0       1383365781      657871000
1383365784      0       1383365782      657871000
1383365785      0       1383365783      657871000
1383365786      0       1383365784      657874000
1383365788      0       1383365786      656876000
1383365789      0       1383365787      656873000
1383365790      0       1383365788      656875000
1383365791      0       1383365789      656877000
1383365792      0       1383365790      656878000

Either my system clock is off by two seconds or something is
very wrong with our instrumentation.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>

The end move in politics is always to pick up a gun.
        -- R. Buckminster Fuller



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