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Guivre46 Frequent Visitor
Joined: Apr 14, 2010 Posts: 1262 Location: West London
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Posted: Fri Jun 29, 2012 11:20 am Post subject: Leap Second to be Added Tomorrow [30 June 2012] |
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This might be the last time this occurs.
Edit: Subject _________________ Mike R [aka Wyvern46]
Go 530T - unsupported
Go550 Live [not renewed]
Kia In-dash Tomtom
Last edited by Guivre46 on Mon Jul 02, 2012 6:51 pm; edited 1 time in total |
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Fri Jun 29, 2012 11:34 am Post subject: |
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I followed the link and the link from that... and liked the line
Quote: | A leap second occurs at the same instant throughout the world, when the familiar 'six pips' radio time signal gains an extra pip before the long pip marking the hour, to become a 'seven pip' signal. So, the minute containing the leap second becomes a 61-second minute. |
But nowhere could I find WHEN they add the extra second.
Anyone know, is it midnight? _________________ "Settling in nicely" ;-) |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Fri Jun 29, 2012 11:58 am Post subject: |
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If the second is added to the 30th June, it must be an extra one so it will either be at midnight BST delaying the start of July 1st by a second, or more likely midnight GMT (or whatever they call it these days).
Do you believe Wikipedia? |
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Guivre46 Frequent Visitor
Joined: Apr 14, 2010 Posts: 1262 Location: West London
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Posted: Fri Jun 29, 2012 1:32 pm Post subject: |
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I expect NatWest's computers will go down again!
Edit: More interestingly, Nav2 devices have been through this before; I wonder if TT are ready for any Nav3 impact? _________________ Mike R [aka Wyvern46]
Go 530T - unsupported
Go550 Live [not renewed]
Kia In-dash Tomtom |
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AliOnHols Pocket GPS Verifier
Joined: Oct 15, 2008 Posts: 1936
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Posted: Fri Jun 29, 2012 4:01 pm Post subject: |
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Thanks for the link M8TJT, loved the screen grab of the time -
17:59:60
EDIT - Andy_P wrote: | ....But nowhere could I find WHEN they add the extra second.
Anyone know, is it midnight? |
From that screen grab, it says Quote: | Screencapture of the UTC-derived Central Standard Time clock from time.gov during the UTC leap second December 31, 2008, 23:59:60 |
Does that help in anyway?, I don't understand UTC's, v BST's
EDIT, EDIT - UTC = GMT _________________ Garmin Nuvi 2599
Android with CamerAlert, OsmAnd+, Waze & TT Europe.
TomTom GO 730, GO 930, GO 940 & Rider2.
SatMap Active 10 & 20. |
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Anita Pocket GPS Moderator
Joined: Mar 15, 2006 Posts: 3219 Location: Windlesham, Surrey
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Posted: Fri Jun 29, 2012 4:18 pm Post subject: |
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Here it says
Quote: | The next leap second will be added at 23:59:60 UTC on June 30, 2012 |
_________________ Anita
TomTom VIA 135 - App 12.075
UK map 1130.12368
Samsung Galaxy S21 |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Fri Jun 29, 2012 4:20 pm Post subject: |
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Quote: | The next leap second will be inserted on June 30 2012 at 23:59:60 UTC | The whole point is that 23:59:60 UTC does not normally exist. It goes from 23:59:59 to 00:00:00 And UTC is prettu much the same as GMT (Which is what they are synchronising).The actual time depends on your time zone, so in UK at the moment we are GMT+1 so the extra second will be at 00:00:60 BST
Edit. There's a damn echo round here!
Last edited by M8TJT on Fri Jun 29, 2012 4:35 pm; edited 1 time in total |
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Anita Pocket GPS Moderator
Joined: Mar 15, 2006 Posts: 3219 Location: Windlesham, Surrey
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Posted: Fri Jun 29, 2012 4:24 pm Post subject: |
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From the above link:
Quote: | Leap seconds are inserted at the end of the last day in June or December. When that is the case, UTC ticks from 23:59:59 to 23:59:60 before reverting to 00:00:00 |
Edit: So surely it will be at 00:59:60 BST? _________________ Anita
TomTom VIA 135 - App 12.075
UK map 1130.12368
Samsung Galaxy S21 |
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AliOnHols Pocket GPS Verifier
Joined: Oct 15, 2008 Posts: 1936
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Posted: Fri Jun 29, 2012 5:03 pm Post subject: |
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I've just remembered something (not completely off topic), probably wrong but happy to be shown the error of my ways.
I was once told that the time 23:59:59 lasts for two seconds because the time 00:00:00 can not exist due to potential errors/accidents/missed appointments i.e. Is that Wednesday or Thursday. So 23:59:59 goes straight to 00:00:01 to avoid any confusion.
Must remind myself to watch the clock at 23:59:59 UTC tomorrow.
nts- Need an Emoticon for "Sad" as in Anorak not just as in Unhappy. _________________ Garmin Nuvi 2599
Android with CamerAlert, OsmAnd+, Waze & TT Europe.
TomTom GO 730, GO 930, GO 940 & Rider2.
SatMap Active 10 & 20. |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Fri Jun 29, 2012 5:11 pm Post subject: |
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Anita wrote: | From the above link:
Quote: | Leap seconds are inserted at the end of the last day in June or December. When that is the case, UTC ticks from 23:59:59 to 23:59:60 before reverting to 00:00:00 |
Edit: So surely it will be at 00:59:60 BST? | Yes of course it is. All these missing seconds is getting me all in a tizzy.
@Ali. The millitary (when I was there anyway) ignore the :00 minutes at midnight so it goes from 23:59 to 00:01 just to save confusion |
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Guivre46 Frequent Visitor
Joined: Apr 14, 2010 Posts: 1262 Location: West London
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Posted: Mon Jul 02, 2012 9:50 am Post subject: |
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I understand from the TT forum that customer support is blaming the leap second for the problems with sirfstar3 devices over the last few days. But I think the problem started before that? _________________ Mike R [aka Wyvern46]
Go 530T - unsupported
Go550 Live [not renewed]
Kia In-dash Tomtom |
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M8TJT The Other Tired Old Man
Joined: Apr 04, 2006 Posts: 10118 Location: Bexhill, South Sussex, UK
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Posted: Mon Jul 02, 2012 10:15 am Post subject: |
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And isn't it strange that both my non TomTom Sirf Star 3 device times are exactly synchronised with my Radio clock (to better than a second) and neither of them give a tracking position error even with 'Lock to road' switched off
Sounds like more baloney from TT. Strange also that most of the posts regarding positional error seem to start with the line 'Since updating..... |
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JimmyTheHand Frequent Visitor
Joined: Apr 16, 2005 Posts: 386
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Guivre46 Frequent Visitor
Joined: Apr 14, 2010 Posts: 1262 Location: West London
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Posted: Tue Jul 03, 2012 10:22 pm Post subject: |
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There was 5 months warning of the leap second addition. I'd have thought this would be basic computer training stuff? _________________ Mike R [aka Wyvern46]
Go 530T - unsupported
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Andy_P Pocket GPS Moderator
Joined: Jun 04, 2005 Posts: 19991 Location: West and Southwest London
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Posted: Tue Jul 03, 2012 11:33 pm Post subject: |
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Tell that to Sirfstar! _________________ "Settling in nicely" ;-) |
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