[time-nuts] End Of The World

Hal Murray hmurray at megapathdsl.net
Tue Jun 30 23:38:19 EDT 2015


> Any observations of anomalous behavior yet?

>From a BU-353:
57203 86380.750 $GPRMC,235940.000,A,3726.0893,N,12212.2627,W,0.52,64.49,300615
,,*20
57203 86381.748 $GPRMC,235941.000,A,3726.0889,N,12212.2627,W,0.45,78.54,300615
,,*2D
57203 86383.138 $GPRMC,235942.000,A,3726.0883,N,12212.2627,W,0.82,157.71,30061
5,,*14
57203 86383.752 $GPRMC,235943.000,A,3726.0874,N,12212.2628,W,1.71,186.96,30061
5,,*1A
57203 86384.750 $GPRMC,235944.000,A,3726.0866,N,12212.2630,W,1.33,180.14,30061
5,,*1D
57203 86385.752 $GPRMC,235944.000,A,3726.0858,N,12212.2631,W,1.10,178.01,30061
5,,*13
57203 86386.751 $GPRMC,235945.000,A,3726.0850,N,12212.2632,W,1.18,179.98,30061
5,,*10
57203 86388.136 $GPRMC,235946.000,A,3726.0842,N,12212.2630,W,1.67,146.83,30061
5,,*1C
57203 86388.752 $GPRMC,235947.000,A,3726.0836,N,12212.2627,W,1.15,129.24,30061
5,,*19

>From a MR-350P
57203 86382.186 $GPRMC,235941.000,A,3726.0808,N,12212.2649,W,0.27,67.38,300615
,,*2C
57203 86382.799 $GPRMC,235942.000,A,3726.0807,N,12212.2652,W,0.37,210.08,30061
5,,*1A
57203 86383.805 $GPRMC,235943.000,A,3726.0811,N,12212.2647,W,0.48,95.98,300615
,,*26
57203 86384.807 $GPRMC,235944.000,A,3726.0812,N,12212.2647,W,0.17,210.63,30061
5,,*13
57203 86385.806 $GPRMC,235944.000,A,3726.0810,N,12212.2648,W,0.29,145.10,30061
5,,*14
57203 86387.188 $GPRMC,235945.000,A,3726.0809,N,12212.2647,W,0.39,174.68,30061
5,,*1E
57203 86387.807 $GPRMC,235946.000,A,3726.0806,N,12212.2647,W,0.54,173.43,30061
5,,*17

They both use SiRF chips.  Above is just the GPRMC lines.  Some of them are 
delayed enough to fall into the next second because every 5th second includes 
the GPGSV sentences.

I'm pretty sure this was reported 3 years ago,  I don't remember who found 
it, but I did remember to look back to find the insertion at midnight TAI 
rather than UTC.

----------

Overall, pretty boring.
Jun 30 16:59:59 shuksan klogd: Clock: inserting leap second 23:59:60 UTC

>From a Z3801A:
57203 86397.032 T22015063023595830+1046
57203 86398.032 T22015063023595930+1047
57203 86399.034 T22015063023596030+103F
57203 86399.034 T22015070100000030+1025
57204 0.034 T220150701000001300102B
57204 1.032 T220150701000002300102C
57204 2.032 T220150701000003300102D

>From a Z3811A:
86397.050728  T22015063023595830+0045
86398.050667  T22015063023595930+0046
86399.050712  T22015063023596030+003E
86399.050765  T22015070100000030+0024
    0.050696  T220150701000001300002A
    1.050750  T220150701000002300002B
    2.050685  T220150701000003300002C

Google's external time servers do their smear dance at 50 ms/hour starting 10 
hours before the leap.  It's linear rather than a fancy cosine.  I'll get a 
graph together one of these days.


-- 
These are my opinions.  I hate spam.






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