You are certainly justified to be cautious of only using an xDEV for state of health. I don't know what GPS does for example to mark SV's as healthy or not healthy.
On Fri, Jan 13, 2017 at 1:11 PM, Bob Camp <[email protected]> wrote: > Hi > > I do agree with their point that systematics will get buried in giant data > blocks. > What I’m not quite as sure of is the utility of even 300 sample blocks to > spot > systematic issues. > > Bob > > > On Jan 13, 2017, at 1:08 PM, Scott Stobbe <[email protected]> > wrote: > > > > I think you might be overthinking their point, that if you plan to use an > > xDEV as a measure for state of health, don't use years worth of data. > > Otherwise it could be days before the xDEV visually changes. > > > > On Fri, Jan 13, 2017 at 11:04 AM, Bob Camp <[email protected]> wrote: > > > >> Hi > >> > >> There’s an interesting comment buried down in that paper about limiting > >> ADEV to > >> < 300 samples per point. Their objective is apparently to better > highlight > >> “systematic > >> errors”. I certainly agree that big datasets will swamp this sort of > >> thing. I’m not quite > >> sure that I’d recommend ADEV to find these things in the first place. My > >> guess is that > >> it’s the only spec they have to call the device good or bad in this case > >> …They don’t seem > >> to have Hadamard in their list of variances. If I was going after > >> systematics with a deviation, > >> that’s the one I’d use. Of course I probably would not use a > something-dev > >> in the first place. > >> > >> Bob > >> > >> > >>> On Jan 13, 2017, at 1:52 AM, Ole Petter Ronningen < > [email protected]> > >> wrote: > >>> > >>> Hi, all > >>> > >>> The question of phase shifts in cables pops up every now and then on > this > >>> list - I stumbled across a good table of measured phase shifts with > >>> temperature in different cable types in this paper: > >>> http://www.ira.inaf.it/eratec/gothenburg/presentations/ERATEC_2014_ > >> PresentationWSchaefer.pdf > >>> that I though would be of interest to others. > >>> > >>> A quick summary given below, see pdf for full details. Lots of other > >>> interesting stuff in there also. > >>> > >>> Values in ppm/K, for 10 Mhz except when otherwise stated. (The paper > >> gives > >>> values for 5, 10 and 100Mhz) > >>> > >>> Huber-Suhner Multiflex 141: -6 > >>> RG-223: -131.9 > >>> Semiflex Cable: -11.5 > >>> Huber-Suhner: -8.6 > >>> Times Microwave LMR-240: -3.4 > >>> Times Microwave SFT-205: 7.7 > >>> Meggitt 2T693 SiO2: 30.6 > >>> Andrew FSJ-1 (@5Mhz): 25 > >>> Andrew FSJ-4 (@5Mhz): 10 > >>> Andrew LDF-1P-50-42: 2.8 > >>> Andrew LDF4-50A: 4.7 > >>> Times Microwave TF4FLEX (@100Mhz):6.4 > >>> Phasetrack PT210 (@100Mhz): 2 > >>> > >>> Ole > >>> _______________________________________________ > >>> time-nuts mailing list -- [email protected] > >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ > >> mailman/listinfo/time-nuts > >>> and follow the instructions there. > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to https://www.febo.com/cgi-bin/ > >> mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
