The last item is the required frequency error estimate for a sense point, in this case +/-0.05ppb. bye, Said In a message dated 7/27/2010 17:07:31 Pacific Daylight Time, smace@intt.net writes: Said, Did the OEM units (from way back) ship with an open pad for the thermistor?

to a nice real time graph for UK :) http://www.nationalgrid.com/uk/Electricity/Data/Realtime/Frequency/Freq60.htm I've looked to see if Red Eléctrica de España, the equivalent organisation here, provides same data... but nothing interesting to time-nuts, only electrical production and demand graphs (and a very politically correct graph of corresponding estimates

tock shows ntp kernel estimated error of (avg/min/max) 1.72ms / 538us / 6.43ms over the last week. sparc is 1.37ms / 493us / 3.18ms. I should copy the Munin data to the webserver tonight...it's also doing live plots of the 60Hz error and frequency (1s, 60s, 600s, and 3600s moving averages).

The algorithmic advances is about to give as tight confidence interval as possible for as short measurement time as possible, and the basic trick is to use overlapping estimations in combination with "over the edge" analysis.

For the big quake in Japan the forecast software assumed a point source for the quake and that cause them > to under estimate the magnitude and get other things wrong. GPS is part of the solution to get better results. > > In the S. CA example he showed a 180 mile long rupture of the San Andreas fault.

However, you have been probably asking, how far from the limits imposed bhy single FPGA cell's inherent jitter are we -- this is what I exactly can not answer with certainty, but according to our indirect measurements, best cells of the given FPGA exhibited estimated jitter about 1..3ps, whereas our last complete design has overall 7ps RMS, under the assumption

That will give you an "estimate" of what the drift rate is. Compare it to the spec on the HP10811 and see if you are "in the ball park."

. > Ultimately, they measured the baseline (down on the flats) to 1 part in > 11.6 million, and they estimate the probable error of the > MICHELSON-ANTONIO line was 1 part in 5 million. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts

As such one must estimate and then defend to management, customers or the government, the non-recurring engineering costs for every project. So I can say with some confidence, rotary switches or not, this device required several hundred hours of design time for which the designer will never recover the true cost unless he values his time at 8 cents an hour.