Re: [time-nuts] Any clock disturbances during the July 11solareclipse?
Getting back to the original question, I noticed no out-of-the ordinary change in the offset of the observatory's hydrogen maser to GPS. Attached is a graph. Note the GPS is an old TAC and plotted are five minute averages of ten second samples. The y axis is in microseconds and the x axis is days since 1900. The variations you see can mostly be attributed to diurnal atmospheric changes and the high jitter in the TAC unit itself. Jim Palfreyman Tasmania Australia Hi all, did anybody out there observe any disturbances in his clocks during (and/or before or after) the July 11 solar eclipse? (due to other duties I've been prevented from doing any tests) Thanks, Antonio I8IOV attachment: eclipse.png___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Handy iPhone app
Hi, just found a handy free iPhone app called Emerald Time. It uses ntp and visually shows the time to within 100 msec. I've videod the screen and compared it with a real clock and found the claim to be accurate. Certainly not up to nut standard, but for a mobile phone it's great. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Handy iPhone app
On 15/07/2010, Jim Palfreyman jim77...@gmail.com wrote: Hi, just found a handy free iPhone app called Emerald Time. It uses ntp and visually shows the time to within 100 msec. I've videod the screen and compared it with a real clock and found the claim to be accurate. You know you can be excommunicated from the list for being off by 1E-1 s :) Steve Certainly not up to nut standard, but for a mobile phone it's great. Jim Palfreyman ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. -- Steve Rooke - ZL3TUV G8KVD The only reason for time is so that everything doesn't happen at once. - Einstein ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PICTIC Backend
Hi Stanley, You might also like to consider BBC BASIC for Windows (http://www.rtrussell.co.uk/bbcwin/bbcwin.html), developed from the language written for the Acorn BBC Micro in the early 80's, the author, Richard Russell, is actively maintaining and enhancing it, and supports a Yahoo Group where discussions and advice are shared (http://tech.groups.yahoo.com/group/bb4w/). It is priced in UK pounds, but equates to about US$40 for the full version, or a free version is also available for trials that is limited to 8 Kbytes program size, and doesn't allow compilation. Regards, Peter On 10 July 2010 19:47, Stanley Reynolds stanley_reyno...@yahoo.com wrote: A terminal emulator like PuTTY is a good starting point to talk to PICTIC. But I was thinking of a GUI that would appear like a virtual instrument. Buttons instead of the @ commands, display of various settings and data. My language of choice is Basic looking at Just Basic now. Wonder if anyone else is thinking about this ? Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] PICTIC Backend
Hi If Windows is the main target - Microsoft now is giving away several compilers for free. They all are quite capable and have no real limitations to them. The downside is that they are indeed Visual what ever based. Not much use on my Mac or on a Linux box. Bob On Jul 15, 2010, at 4:39 AM, Peter Vince wrote: Hi Stanley, You might also like to consider BBC BASIC for Windows (http://www.rtrussell.co.uk/bbcwin/bbcwin.html), developed from the language written for the Acorn BBC Micro in the early 80's, the author, Richard Russell, is actively maintaining and enhancing it, and supports a Yahoo Group where discussions and advice are shared (http://tech.groups.yahoo.com/group/bb4w/). It is priced in UK pounds, but equates to about US$40 for the full version, or a free version is also available for trials that is limited to 8 Kbytes program size, and doesn't allow compilation. Regards, Peter On 10 July 2010 19:47, Stanley Reynolds stanley_reyno...@yahoo.com wrote: A terminal emulator like PuTTY is a good starting point to talk to PICTIC. But I was thinking of a GUI that would appear like a virtual instrument. Buttons instead of the @ commands, display of various settings and data. My language of choice is Basic looking at Just Basic now. Wonder if anyone else is thinking about this ? Stanley ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Handy iPhone app
Now if only Apple would allow Emerald Time to correct the i-phone's internal clock we'd actually have something. By using Emerald Time my i-phone's internal clock has shown itself to be off by as much as 12.4 seconds. That no longer qualifies as a usable clock to me. If I am out somewhere and want to know what time it is I have to bring Emerald Time up in order to see. You would think the phone would be receiving it's time from ATT's standards... but apparently not. There is no way ATT would be 12.4 seconds off which makes it apparent that Apple does not allow any correction of the phone's internal clock. To others here using the i-Phone... how far off is your i-Phone's internal clock??? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Handy iPhone app
Hate to say it. ATT is wrong and so are the rest of us. Its Apple time on Apple stuff thats the standard. You can have your own reference when you control a particular world. On Thu, Jul 15, 2010 at 10:47 AM, Bob Bownes bow...@gmail.com wrote: I put ntp on mine. :) On Thu, Jul 15, 2010 at 10:40 AM, Mark Gulbrandsen ksa50...@yahoo.com wrote: Now if only Apple would allow Emerald Time to correct the i-phone's internal clock we'd actually have something. By using Emerald Time my i-phone's internal clock has shown itself to be off by as much as 12.4 seconds. That no longer qualifies as a usable clock to me. If I am out somewhere and want to know what time it is I have to bring Emerald Time up in order to see. You would think the phone would be receiving it's time from ATT's standards... but apparently not. There is no way ATT would be 12.4 seconds off which makes it apparent that Apple does not allow any correction of the phone's internal clock. To others here using the i-Phone... how far off is your i-Phone's internal clock??? ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] GPS Timing Source -- looking at buying
On 07/12/2010 02:15 PM, Bob Camp wrote: Hi The original post simply mentioned EBU. Thus the confusion. I think they mean SMPTE 12M LTC. VITC would also be possible, and not completely without its merrits, but I doubt it. AES has not cranked out any synchronisation specs beyond the DARS in AES-11 (essentially an AES-3 with certain properties), and I don't recall that EBU specified any synchronisation protocols, where as both specify refer to timing relationships and SMPTE-12M. I hope nobody is considering MTC Cheers, Magnus ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] Handy iPhone app
On 7/15/2010 9:40 AM, Mark Gulbrandsen wrote: ... There is no way ATT would be 12.4 seconds off ... I used to work in the cell infra business. While it's less true today, there are still a number of operators that do not sync system clocks. The time supplied to users can be **minutes** off. Most newer operational standards can't tolerate this and accurate time (better than a ms) is important. WiMAX requires TDD base stations to base station alignment to be better than 1 microsecond. Most telecom operators want to avoid GPS at every site. It's a logistical PITA. -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport) ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] rapid startup GPSDO
(*) uW Radio ham application where you arrive on the top of the hill and switch all equipment on and can be making contacts minutes after having better than 1e-8(1e-9). that's precisely the sort of application I'm looking at.. Wheels stopped to on-the-air in 20 minutes. Then... Look no further ;-) Reflock to 1pps is your thing. Take a look of all variants by VE1ALQ and G8ACE (there is also a japanese variation... can't recall). all those variants may use my reflockI 1pps CPLD config. Luis Cupido. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] 74AC175PC Update
Hi All The 74AC175PCs I ordered arrived today and I can now confirm they do have the correct part number and are manufactured by National Semiconductor, all look to be from the same batch. Over the next day or so I'll contact directly all those confirmed as being on my list with full cost including delivery etc. regards Nigel GM8PZR ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] might be 5060A extenders on the E
290454675707 no assoc with the seller -pete ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] Handy iPhone app
Oz-in-DFW writes: ... There is no way ATT would be 12.4 seconds off ... I used to work in the cell infra business. While it's less true today, there are still a number of operators that do not sync system clocks. The time supplied to users can be **minutes** off. Most newer operational standards can't tolerate this and accurate time (better than a ms) is important. WiMAX requires TDD base stations to base station alignment to be better than 1 microsecond. Most telecom operators want to avoid GPS at every site. It's a logistical PITA. Here in the Bay Area, ATT/iPhone time has gotten noticeably worse recently. The error used to be around 4 seconds; now it's 49 seconds (!). Emerald Time is fine for interactive use, but what I find very impolite is that ATT's bad timestamps are written into the EXIF headers on photos. Sometimes I take pictures of sundials, for example, and a 49-second error is not negligible for a carefully made dial. It would be amusing to arrange for a long-term record of the offset of one's phone (which can of course change across multiple providers during travel), say by using a background process to take a sample every few hours against NTP sources or against GPS if the phone has it (or both). Then any photos can be batch-corrected later if desired. Apple, give me control over the time on my own phone, and please don't force me to resort to these schemes :-). Cheers, Peter Monta ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
