Re: [time-nuts] chip scale atomic clock

Dear all, After very mild amount of homework, I think a followup was due. Magnus Danielson wrote: Peter Vince wrote: 2009/12/26 Robert Lutwak : ... CSAC is intended for portable battery-powered operation. Surely your basement has the space and wallplug power to support an LPRO. (p.s. don't

Re: [time-nuts] chip scale atomic clock

Peter Vince wrote: 2009/12/26 Robert Lutwak : ... CSAC is intended for portable battery-powered operation. Surely your basement has the space and wallplug power to support an LPRO. (p.s. don't cool the damn thing, heat it). ... Hi Robert, Do I understand you are suggesting heating an LPR

Re: [time-nuts] chip scale atomic clock

2009/12/26 Robert Lutwak : >... > CSAC is intended for portable battery-powered operation. Surely your > basement has the space and wallplug power to support an LPRO. (p.s. don't > cool the damn thing, heat it). >... Hi Robert, Do I understand you are suggesting heating an LPRO, not cooling

Re: [time-nuts] chip scale atomic clock

On Dec 26, 2009, at 10:36 AM, Robert Lutwak wrote: I pay pretty close attention to what people in this field are saying, and I've never heard anyone say "we'll get to 1e-11 short term stability at 1 second real soon now." 1e-11 at 1 second is the XPRO spec (and 2X better than LPRO or PRS

Re: [time-nuts] chip scale atomic clock

Hi Thanks, that's one I hadn't seen yet. I did not get Besancon this year. I guess my main point is that *if* the physics package is capable of ~2x10^-11 with good electronics, then what ever you get past that is simply mission related. A different system requirement could take the performance

Re: [time-nuts] chip scale atomic clock

So when do we see them on ebay?? ;-) Like the low power aspect. instead of 20-40 watts or more On Sat, Dec 26, 2009 at 11:14 AM, Bob Camp wrote: > Hi > > Not ment as a knock, just a comment that a lot of work is still being done > on getting short term stability closer to a 100~1000X bigger devi

Re: [time-nuts] chip scale atomic clock

Notwithstanding the performance of one physics package, I think it's safe to say that no-one is holding their breath waiting for a 1e-11 CSAC. That figure (5B) shows the Allan deviation of 10 physics packages (measured with optimal laboratory electronics) and you are correct that the best of t

Re: [time-nuts] chip scale atomic clock

Hi I *knew* I'd seen a chart somewhere that was getting close to 1x10-11 at 1 second for the best of the group. It's figure B on page 7 of your FSM 2008 paper. Bob On Dec 26, 2009, at 10:36 AM, Robert Lutwak wrote: > I pay pretty close attention to what people in this field are saying, and

Re: [time-nuts] chip scale atomic clock

In message , Robert Lutwak writes: >The cats were much happier during the CsIII development (see >http://home.comcast.net/~rlutwak). It was bigger and warmer. Any >Cat-Nuts out there who can help me find one with significantly lower SWAP? Just read a couple of the papers on your site: Impressi

Re: [time-nuts] chip scale atomic clock

Hi Not ment as a knock, just a comment that a lot of work is still being done on getting short term stability closer to a 100~1000X bigger device. Bob On Dec 26, 2009, at 10:36 AM, Robert Lutwak wrote: > I pay pretty close attention to what people in this field are saying, and > I've never h

Re: [time-nuts] chip scale atomic clock

I pay pretty close attention to what people in this field are saying, and I've never heard anyone say "we'll get to 1e-11 short term stability at 1 second real soon now." 1e-11 at 1 second is the XPRO spec (and 2X better than LPRO or PRS10). There are good (physics) reasons why those units all

Re: [time-nuts] chip scale atomic clock

Hi 1x10-11 at 1 second, going down by tau^0.5. That makes them candidates for the basement system Bob On Dec 26, 2009, at 9:33 AM, Robert Lutwak wrote: > How "good" do you want? > > > At 09:13 AM 12/26/2009, you wrote: >> Hi >> >> They still seem to be at the stage of "we'll get to g

Re: [time-nuts] chip scale atomic clock

How "good" do you want? At 09:13 AM 12/26/2009, you wrote: Hi They still seem to be at the stage of "we'll get to good short term stability at 1 second real soon now". Bob On Dec 26, 2009, at 8:23 AM, Ronald Held wrote: > I read about this a while ago. Has anyone seen anything recent abo

Re: [time-nuts] chip scale atomic clock

Hi They still seem to be at the stage of "we'll get to good short term stability at 1 second real soon now". Bob On Dec 26, 2009, at 8:23 AM, Ronald Held wrote: > I read about this a while ago. Has anyone seen anything recent about > it, notably desktop or even portable units? >

Re: [time-nuts] chip scale atomic clock

I have one here, on my desktop, at home. It's drawing about 100 mW and performing at about 8e-11/sqrt(tau). At 08:23 AM 12/26/2009, you wrote: I read about this a while ago. Has anyone seen anything recent about it, notably desktop or even portable units? Ronald _

Re: [time-nuts] chip scale atomic clock

On Sat, Dec 26, 2009 at 8:23 AM, Ronald Held wrote: > I read about this a while ago. Researcher Time Line Translations were explained here a few days ago: http://www.xkcd.com/678/ The mouse-overs always have interesting comments... -- http://www.wearablesmartsensors.com/ http://www.softwaresa

[time-nuts] chip scale atomic clock

I read about this a while ago. Has anyone seen anything recent about it, notably desktop or even portable units? Ronald ___ time-nuts mailing list -- time-nuts@febo.com To unsubscri

Re: [time-nuts] Chip-scale Atomic Clock !

Brooks Shera said the following on 09/19/2006 06:48 PM: > The excerpt below from GPS World refers to a Chip-scale atomic clock being > developed by DARPA. > > Does anyone know what technology they might be using for such a clock? > > "Atomic Clock Synchronization > The U.S. Navy Space and Na

Re: [time-nuts] Chip-scale Atomic Clock !

Go check the NIST pages as well. On Wed, September 20, 2006 0:56, Glenn said: > Could be this: > THE *CHIP*-SCALE *ATOMIC CLOCK* – RECENT DEVELOPMENT PROGRESS > > http://tycho.usno.navy.mil/ptti/ptti

Re: [time-nuts] Chip-scale Atomic Clock !

n of precise time and frequency measurement" Sent: Wednesday, September 20, 2006 12:48 AM Subject: [time-nuts] Chip-scale Atomic Clock ! > The excerpt below from GPS World refers to a Chip-scale atomic clock > being developed by DARPA. > > Does anyone know what technolog

Re: [time-nuts] Chip-scale Atomic Clock !

Could be this: THE *CHIP*-SCALE *ATOMIC CLOCK* – RECENT DEVELOPMENT PROGRESS http://tycho.usno.navy.mil/ptti/ptti2003/paper44.pdf#search=%22usno%20chip%20atomic%20clock%22 See also the conference pape

[time-nuts] Chip-scale Atomic Clock !

The excerpt below from GPS World refers to a Chip-scale atomic clock being developed by DARPA. Does anyone know what technology they might be using for such a clock? "Atomic Clock Synchronization The U.S. Navy Space and Naval Warfare Systems Center San Diego is incorporating a chip-scale at