Re: [time-nuts] Three-cornered hat on timelab?

-GPSDOs/info From: Bob kb8tq <kb...@n1k.org> To: Bob Stewart <b...@evoria.net> Cc: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wednesday, May 3, 2017 11:11 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi If you convert

Re: [time-nuts] Three-cornered hat on timelab?

and frequency measurement <time-nuts@febo.com> > Sent: Wednesday, May 3, 2017 10:48 AM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Hi > > Dump it to a csv file and do it in Excel would be one way. You want to be able > to control the process a bit so t

Re: [time-nuts] Three-cornered hat on timelab?

From: Bob kb8tq <kb...@n1k.org> To: Bob Stewart <b...@evoria.net> Cc: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wednesday, May 3, 2017 10:48 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Dump it to a csv file and do

Re: [time-nuts] Three-cornered hat on timelab?

11 at 1s tau in that dataset. Still, that test will verify that the 5370 hasn't degraded. Bob From: Tom Van Baak <t...@leapsecond.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wednesday, May 3, 2017 12:02 AM Subject: Re: [time-nuts] Three

Re: [time-nuts] Three-cornered hat on timelab?

Tom Van Baak <t...@leapsecond.com> > Sent: Wednesday, May 3, 2017 7:20 AM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Hi > > RMS: > > https://en.wikipedia.org/wiki/Root_mean_square > <https://en.wikipedia.org/wiki/Root_mean_square> > >

Re: [time-nuts] Three-cornered hat on timelab?

<t...@leapsecond.com> Sent: Wednesday, May 3, 2017 7:20 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi RMS: https://en.wikipedia.org/wiki/Root_mean_square When we talk about things like “6 sigma” in QA, the sigma is the RMS.  Bob On May 3, 2017, at 1:44 AM, Bob Stewart <b...

Re: [time-nuts] Three-cornered hat on timelab?

l verify that the 5370 hasn't degraded. Bob > > From: Tom Van Baak <t...@leapsecond.com> > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Wednesday, May 3, 2017 12:02 AM > Subject: Re: [time-nuts] Three-cornered hat on timelab? >

Re: [time-nuts] Three-cornered hat on timelab?

t;t...@leapsecond.com> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Wednesday, May 3, 2017 12:02 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi BobS, > I've also made the timelab file (compressed by 7z) available here: >

Re: [time-nuts] Three-cornered hat on timelab?

Jim, Errors aligning up due to sidreal time is most likely due to the multipath errors and repeated upload shifts. Solar shifts would align up on 24 h basis. The filtering of the time-constant is expected. Cheers, Magnus On 04/29/2017 04:14 PM, Jim Harman wrote: On Thu, Apr 27, 2017 at

Re: [time-nuts] Three-cornered hat on timelab?

On Thu, Apr 27, 2017 at 12:48 PM, Bob Stewart wrote: > So, back to my question: Where are the large ionospheric phase moves? > This question has been causing me doubt since I started on this project. > Or don't I still have enough data collected for this to happen? > > Bob >

Re: [time-nuts] Three-cornered hat on timelab?

GFS-GPSDOs/info > > From: Magnus Danielson <mag...@rubidium.dyndns.org> > To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency > measurement <time-nuts@febo.com> >Cc: mag...@rubidium.se > Sent: Tuesday, April 18, 2017 1:09 AM > Subj

Re: [time-nuts] Three-cornered hat on timelab?

Saturday, April 29, 2017 9:15 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? On Thu, Apr 27, 2017 at 12:48 PM, Bob Stewart <b...@evoria.net> wrote: So, back to my question:  Where are the large ionospheric phase moves?  This question has been causing me doubt since I

Re: [time-nuts] Three-cornered hat on timelab?

@rubidium.se Sent: Saturday, April 29, 2017 6:45 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Bob, On 04/27/2017 06:48 PM, Bob Stewart wrote: > Hi Magnus, > > Try as I might, the weather and the local power company had other ideas > about my long term capture.  I'm r

Re: [time-nuts] Three-cornered hat on timelab?

art <b...@evoria.net>; Discussion of Precise Time and Frequency Measurement <time-nuts@febo.com> *Cc:* mag...@rubidium.se *Sent:* Saturday, April 29, 2017 6:45 AM *Subject:* Re: [time-nuts] Three-cornered hat on timelab? Hi Bob, On 04/27/2017 06:48 PM, Bob Stewart wrote: Hi Magnu

Re: [time-nuts] Three-cornered hat on timelab?

Hi Bob, On 04/27/2017 06:48 PM, Bob Stewart wrote: Hi Magnus, Try as I might, the weather and the local power company had other ideas about my long term capture. I'm running everything but the 5370 from a UPS. I guess I'm going to have to get batteries for my other UPS and run the 5370 from

Re: [time-nuts] Three-cornered hat on timelab?

On 4/27/17 3:10 PM, Bob Stewart wrote: Hi Jim, said:"Ionosphere is one - if you're near a ionosonde you might be able to get a data set to correlate against. It's not necessarily a "worst at noon, best at midnight" thing - some of the satellites contributing to your fix will be on slant

Re: [time-nuts] Three-cornered hat on timelab?

From: jimlux <jim...@earthlink.net> > To: time-nuts@febo.com > Sent: Thursday, April 27, 2017 5:03 PM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > On 4/27/17 12:10 PM, Bob Stewart wrote: >> Hi Bob, >> said: >> "You have roughly 25 ns p-p

[time-nuts] Three-cornered hat on timelab?

One of the main reasons Lady Heather tracks the sun position, calculates solar noon, etc was at the request of some people researching solar effects on the GPS signal and multipath. You can enable logging of the satellite constellation used each second and the sun position (it shows up at sat

Re: [time-nuts] Three-cornered hat on timelab?

From: Bob kb8tq <kb...@n1k.org> To: Bob Stewart <b...@evoria.net> Cc: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Thursday, April 27, 2017 4:17 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Dig into spac

Re: [time-nuts] Three-cornered hat on timelab?

From: jimlux <jim...@earthlink.net> To: time-nuts@febo.com Sent: Thursday, April 27, 2017 5:03 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? On 4/27/17 12:10 PM, Bob Stewart wrote: > Hi Bob, > said: > "You have roughly 25 ns p-p in the data you show.&quo

Re: [time-nuts] Three-cornered hat on timelab?

> To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Magnus Danielson <mag...@rubidium.se> Sent: Thursday, April 27, 2017 1:18 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi You have roughly 25

Re: [time-nuts] Three-cornered hat on timelab?

t; > Bob > > > From: Bob kb8tq <kb...@n1k.org> > To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency > measurement <time-nuts@febo.com> > Cc: Magnus Danielson <mag...@rubidium.se> > Sent: Thursday, April 27, 2017 1:18 PM

Re: [time-nuts] Three-cornered hat on timelab?

t;; Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: Magnus Danielson <mag...@rubidium.se> Sent: Thursday, April 27, 2017 1:18 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi You have roughly 25 ns p-p in the data you show. There are a

Re: [time-nuts] Three-cornered hat on timelab?

neo/groups/GFS-GPSDOs/info > > From: Magnus Danielson <mag...@rubidium.dyndns.org> > To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency > measurement <time-nuts@febo.com> > Cc: mag...@rubidium.se > Sent: Tuesday, April 18, 2017 1:

Re: [time-nuts] Three-cornered hat on timelab?

measurement <time-nuts@febo.com> Cc: mag...@rubidium.se Sent: Tuesday, April 18, 2017 1:09 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Bob, That is a good solution indeed. Good luck with that measurement run! One of the fun stuff with Timelab is that you can walk by

Re: [time-nuts] Three-cornered hat on timelab? -> GPS

Hi There are a number of survey grade receivers that pop up on eBay from time to time. They rarely have “timing” features like an external reference and PPS output that both work properly. There’s also a bit of risk buying them and finding out they are non-functional. All that said, if you

Re: [time-nuts] Three-cornered hat on timelab?

quency measurement <time-nuts@febo.com> Sent: Monday, April 17, 2017 3:05 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Bob S, Here's an example of a one week GPSDO run: http://leapsecond.com/pages/tbolt-8d/ IIRC, this was a default, untuned, self-surveyed TBolt. Yo

Re: [time-nuts] Three-cornered hat on timelab?

Hi Hal, On 04/18/2017 03:33 AM, Hal Murray wrote: mag...@rubidium.dyndns.org said: You can fair better if you have a double-frequency GPS setup, as it can first-degree measure and compensate the ionospheric shifts, which allows for a benefit over L1 CA only receiver. Are any dual-frequency

Re: [time-nuts] Three-cornered hat on timelab?

nd frequency measurement <time-nuts@febo.com> Cc: mag...@rubidium.se Sent: Monday, April 17, 2017 5:28 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Bob, First of all, there is a first degree of compensation from the GPS transmitted Klobuchar ionspheric model. There is a limit

Re: [time-nuts] Three-cornered hat on timelab?

mag...@rubidium.dyndns.org said: > You can fair better if you have a double-frequency GPS setup, as it can > first-degree measure and compensate the ionospheric shifts, which allows > for a benefit over L1 CA only receiver. Are any dual-frequency receivers available at hobbyist prices? What is

Re: [time-nuts] Three-cornered hat on timelab?

time-nuts@febo.com> Sent: Monday, April 17, 2017 3:05 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Bob S, Here's an example of a one week GPSDO run: http://leapsecond.com/pages/tbolt-8d/ IIRC, this was a default, untuned, self-surveyed TBolt. You can see some level of dail

Re: [time-nuts] Three-cornered hat on timelab?

you aren't seeing them, either during your 8+ day capture of the Tbolt. > > Bob > > > From: Tom Van Baak <t...@leapsecond.com> > To: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Monday, April 17, 2017 3:05 PM >

Re: [time-nuts] Three-cornered hat on timelab?

ment" <time-nuts@febo.com> Sent: Monday, April 17, 2017 9:33 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Bob, OK, thanks. I've kicked off a 7 day run of a GFS against the PRS-45A. That should be long enough to separate out the GFS from the PRS' drift direction from t

Re: [time-nuts] Three-cornered hat on timelab?

ebo.com> Sent: Monday, April 17, 2017 9:33 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi Bob, OK, thanks. I've kicked off a 7 day run of a GFS against the PRS-45A. That should be long enough to separate out the GFS from the PRS' drift direction from the ionosphere. Bob

Re: [time-nuts] Three-cornered hat on timelab?

precise time and frequency measurement <time-nuts@febo.com> Sent: Monday, April 17, 2017 11:28 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi The ionosphere is the culprit in terms of the daily swing. The swing is a function of the goodness of fit between the GPS

Re: [time-nuts] Three-cornered hat on timelab?

rom: Bob kb8tq <kb...@n1k.org> > To: Bob Stewart <b...@evoria.net> > Cc: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Monday, April 17, 2017 11:28 AM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Hi >

Re: [time-nuts] Three-cornered hat on timelab?

n1k.org> > To: Bob Stewart <b...@evoria.net> > Cc: Discussion of precise time and frequency measurement <time-nuts@febo.com> > Sent: Monday, April 17, 2017 7:55 AM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Hi > > The data I have on the KS

Re: [time-nuts] Three-cornered hat on timelab?

precise time and frequency measurement <time-nuts@febo.com> Sent: Monday, April 17, 2017 7:55 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi The data I have on the KS boxes was posted to the list back when they were.a hot topic. I’m sure it is still in the archives.I’m guess

Re: [time-nuts] Three-cornered hat on timelab?

b Stewart <b...@evoria.net>; Discussion of precise time and frequency > measurement <time-nuts@febo.com> > Cc: John Miles <j...@miles.io> > Sent: Thursday, April 13, 2017 7:19 PM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Hi > &

Re: [time-nuts] Three-cornered hat on timelab?

t: Thursday, April 13, 2017 6:01 PM Subject: Re: [time-nuts] Three-cornered hat on timelab? Longer runs would be better to the extent that they give you smaller error bars in your tau range of interest, certainly. But any effects that influence one of your runs but not the others will render

Re: [time-nuts] Three-cornered hat on timelab?

be great! Bob  From: Bob kb8tq <kb...@n1k.org> To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency measurement <time-nuts@febo.com> Cc: John Miles <j...@miles.io> Sent: Thursday, April 13, 2017 7:19 PM Subject: Re: [time-nuts] Three-cornere

Re: [time-nuts] Three-cornered hat on timelab?

requency measurement' > <time-nuts@febo.com> > Sent: Thursday, April 13, 2017 6:01 PM > Subject: Re: [time-nuts] Three-cornered hat on timelab? > > Longer runs would be better to the extent that they give you smaller error > bars in your tau range of interest, certainly.

Re: [time-nuts] Three-cornered hat on timelab?

ril 13, 2017 8:41 AM To: Discussion of precise time and frequency measurement; John Miles Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi John, Thanks!  With lesser equipment, such as the 5370A, would longer runs be better?  I used a set of 1 hr runs and the result wasn't quit

Re: [time-nuts] Three-cornered hat on timelab?

To: Discussion of precise time and frequency measurement; John Miles Subject: Re: [time-nuts] Three-cornered hat on timelab? Hi John, Thanks! With lesser equipment, such as the 5370A, would longer runs be better? I used a set of 1 hr runs and the result wasn't quite what I had expected

Re: [time-nuts] Three-cornered hat on timelab?

t;j...@miles.io> To: 'Discussion of precise time and frequency measurement' <time-nuts@febo.com> Sent: Thursday, April 13, 2017 1:07 AM Subject: Re: [time-nuts] Three-cornered hat on timelab? > It was mentioned that Timelab can do a three-cornered hat.  I can't find it.  > I

Re: [time-nuts] Three-cornered hat on timelab?

> It was mentioned that Timelab can do a three-cornered hat. I can't find it. > Is > this something that can only be done with multiple Timepods connected, or > is there an option that I'm missing? Or is there some other tool that needs > to be used? For the record, I want to create the

[time-nuts] Three-cornered hat on timelab?

It was mentioned that Timelab can do a three-cornered hat.  I can't find it.  Is this something that can only be done with multiple Timepods connected, or is there an option that I'm missing?  Or is there some other tool that needs to be used?  For the record, I want to create the 3c-hat from