. >>> Hint: the holdover estimator does not handle warmup as well as it should Thanks for the interesting responses. Especially interesting re importance of accurate location / using low elevation sats / sky view / warm-up.

Thus, there is a bias in the estimation and overoptimistic or even seemingly physically impossible (until you understand the mechanics). This have been occupying the mind of some of the best folks we have in the field. Just interacting and discussing this with some of them have been a great learning experience.

Any estimate on when they will ship new firmware? Has anybody else noticed the problem? (I tried google news and NANOG but didn't find anything.) -- These are my opinions. I hate spam.

I was wondering how can I estimated the age of the Rubidium oscillator. I think the age is related to the lamp voltage but which voltage should I read ?

Shimkin, "Clock synchronization using maximal margin estimation" 2011 19th Mediterranean Conference on Control & Automation (MED), Corfu, 2011, pp. 1182-1187. https://doi.org/10.1109/MED.2011.5983128

I just stumbled over this sentence in [1]: ---schnipp--- The shift of the Rb-hyperfine center frequency νRb resulting from buffer gas pressure (2.6 kPa) is measured as 3390 Hz, this is in excellent agreement with theoretically estimated value of 3385 Hz.

phk@phk.freebsd.dk said: > I later talked to a geologist who knows the Danish underground well, and he > estimated I would have needed to drill to at least 25m depth to escape > seasonal temperature-changes and cited a research paper from the 1950'ies > where the did precisely that experiment.

These birds were on the same path (flying east to west) as the Canadas, following behind and this flock (hard for me to estimate but it had to be hundreds, probably thousands) continued for about 2 minutes as I continued to watch in awe.

I did my best to make conservative estimates of the number of birds based off of perceived duplication of calls, or lack thereof, within a given interval of about 40 seconds.

We also saw 1-2 BLACK TERNS and about 12 ROSEATE TERNS on the island- among an estimated 1600 COMMON TERNS. During the ride back to the dock, we found a ROYAL TERN resting on a small rock isle about 1/2 mouth south of the Guilford shoreline. Frank Mantlik Stratford Sent from my iPhone