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Cellular forums Home > Archive > Garmin GPS > March 2007 > Daylight Savings time question
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| Author |
Daylight Savings time question
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| Andrew 2007-03-10, 7:33 am |
| How does this work in GPSes? I believe my Garman has an option to use or
ignore DST. But I wonder what goes on behind the scenes? Is there some
standard time reference that the satellites download, and individual units
have to be aware of the local time and whether or not to 'use' DST? I would
think so, since all the satellite signals are used by multiple timezones
across the country if not world. Thus, they wouldn't know about 'local'
time; that would have to be in the unit.
So perhaps the firmware in the unit needs to understand the 'rules' of DST?
And a unit that was created several years ago before Congress mucked around
with this March DST date would need a firmware update?
Anyone know how this works from a technical point of view?
More curious than anything else!
(Please reply before 0200 EST Sunday morning. My computer may fail after
that time, and I wont' be able to read any posts. I'm convinced also the
power authority will shut down.)
--
-------------------------------------------------------------
Regards -
- Andrew
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| "Andrew" <andrew@jkl.com> wrote:
> How does this work in GPSes? I believe my Garman has an option to use =
or=20
> ignore DST. But I wonder what goes on behind the scenes? Is there =
some=20
> standard time reference that the satellites download, and individual =
units=20
> have to be aware of the local time and whether or not to 'use' DST? I =
would=20
> think so, since all the satellite signals are used by multiple =
timezones=20
> across the country if not world. Thus, they wouldn't know about =
'local'=20
> time; that would have to be in the unit.
>=20
> So perhaps the firmware in the unit needs to understand the 'rules' of =
DST?=20
> And a unit that was created several years ago before Congress mucked =
around=20
> with this March DST date would need a firmware update?
>=20
> Anyone know how this works from a technical point of view?
>=20
> More curious than anything else!
>=20
> (Please reply before 0200 EST Sunday morning. My computer may fail =
after=20
> that time, and I wont' be able to read any posts. I'm convinced also =
the=20
> power authority will shut down.)
It's very possible that GPS and other device like wall Clock, Cell phone
etc. use radio frequency to adjust the Daylight Savings Time and =
Time-Zone
etc.. And this is my wild guess., and we will soon find out
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| emanon 2007-03-10, 12:34 pm |
|
"Andrew" <andrew@jkl.com> wrote in message
news:6ZpIh.64$6W5.40@newsfe12.lga...
> How does this work in GPSes? I believe my Garman has an option to use or
> ignore DST. But I wonder what goes on behind the scenes? Is there some
> standard time reference that the satellites download, and individual units
> have to be aware of the local time and whether or not to 'use' DST? I
> would think so, since all the satellite signals are used by multiple
> timezones across the country if not world. Thus, they wouldn't know about
> 'local' time; that would have to be in the unit.
>
> So perhaps the firmware in the unit needs to understand the 'rules' of
> DST? And a unit that was created several years ago before Congress mucked
> around with this March DST date would need a firmware update?
>
> Anyone know how this works from a technical point of view?
>
> More curious than anything else!
>
> (Please reply before 0200 EST Sunday morning. My computer may fail after
> that time, and I wont' be able to read any posts. I'm convinced also the
> power authority will shut down.)
>
I'm not sure it realy matters other than maybe if the backlight comes on at
night. I recently went from US East Coast to Mountain Time and back to East
Coast. I never bothered to reset the time zones and I was able to navigate
around my travel destinations no problem. The only problem I had was not
related to time zones, but that pesky problem of my GPSr needing to be told
where I was when first statrting up at the extreme locations. (I flew, so
the unit was off during travel.)
For the record, I was using a Vista Cx. I am told units with the SIRF
chipset, such as the 60 / 76 CSx, self orient much quicker in situations
like this.
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| Wendell 2007-03-10, 10:33 pm |
| Andrew wrote:
[snip]
> (Please reply before 0200 EST Sunday morning. My computer may fail after
> that time, and I wont' be able to read any posts. I'm convinced also the
> power authority will shut down.)
oh goody, I get to use my leftover y2k supplies!
| |
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| On Mon, 12 Mar 2007 20:30:30 -0400, Bob Bailey
< bobat@messagebuilder
sdot.com> wrote:
>Fred McKenzie wrote:
>
>I had the same problem with my Nuvi 350. I found this on
>http://www.gpspassion.com/forumsen/...051&whichpage=2
>
>That update may be available before the actual change, but if not, you
>can go into the settings menu > locale > time > hit OK, hit OK again >
>select ON. This will give you the correct time, and when the update
>becomes available, you can download that and reset your DST setting in
>the unit to AUTO.
That works also but I went into the Travel Kit>World Clock>(touch the
clock)>Daylight Savings.
Mike
| |
| Fred McKenzie 2007-03-13, 12:33 pm |
| In article < uqacv2l9e8b30gj5evnk
dncqg27cv91nul@4ax.com>,
MikeK <mkriegel@houston.rr.com> wrote:
>
> That works also but I went into the Travel Kit>World Clock>(touch the
> clock)>Daylight Savings.
Bob & Mike-
Thanks for the pointers. Somehow I missed both alternatives when I
searched my various menus.
After going the Travel Kit route, I tried the Locale approach and found
a reversed Auto/Off/On screen with the "On" already checked.
Fred
| |
| Andrew 2007-03-14, 10:33 am |
| Jerry M wrote:
>
> Andrew I reread your post and do not see what garmin unit you are
> talking about. I have a garmin gpsmap60CSx and loaded 3.20 software
> before the time change. I have daylight saving time set to auto and
> the unit changed at 2am to 3am with no problem.
> Jerry
Good point Jerry - should of mentioned that somewhere along the line - it's
the Garmin Quest (not the newer Quest 2).
Their software site
http://www.garmin.com/support/downl...ails.jsp?id=615 doesn't indicate
(unlike some other sites that specifically list a DST fix, for example,
http://www.garmin.com/support/downl...ils.jsp?id=1847 for the Nuvi 360)
any DST fixes.
From what I gather, their support for DST was kind of spread across some,
but not all, of their units. A little disturbing.
--
-------------------------------------------------------------
Regards -
- Andrew
| |
| John Richards 2007-03-14, 10:33 pm |
| "Andrew" <andrew@jkl.com> wrote in message news:7zRJh.127$07.30@newsfe12.lga...
> Their software site
> http://www.garmin.com/support/downl...ails.jsp?id=615 doesn't indicate
> (unlike some other sites that specifically list a DST fix, for example,
> http://www.garmin.com/support/downl...ils.jsp?id=1847 for the Nuvi 360)
> any DST fixes.
>
> From what I gather, their support for DST was kind of spread across some,
> but not all, of their units. A little disturbing.
I agree, Garmin's spotty DST support does not bode well.
I had to manually switch my Nuvi 350 from Auto DST to DST On.
--
John Richards
| |
| Kent Friis 2007-03-14, 10:33 pm |
| Den Wed, 14 Mar 2007 12:28:25 -0700 skrev John Richards:
> "Andrew" <andrew@jkl.com> wrote in message news:7zRJh.127$07.30@newsfe12.lga...
>
> I agree, Garmin's spotty DST support does not bode well.
> I had to manually switch my Nuvi 350 from Auto DST to DST On.
How about "The US governments spotty DST support does not bode well"?
Afterall, they were the one who decided to ruin things in the first
place.
/Kent
--
"So there I was surrounded by all these scary creatures
They were even scarier than what Microsoft call features"
- C64Mafia: Forbidden Forest (Don't Go Walking Slow).
| |
| Andrew 2007-03-14, 10:33 pm |
| John Richards wrote:
> "Kent Friis" <nospam@nospam.invalid> wrote in message
> news:45f84ed9$0$9027
1$14726298@news.sunsite.dk...
>
> How do you figure that? The law was passed by our representatives in
> Congress as part of a worldwide effort toward reducing energy usage.
> Garmin has known about this change since August 2005.
> The change was coordinated with our neighbor Canada, and will be
> picked up by the European Union soon. Not exactly a spotty effort.
This is getting a tad off subject, but what's amazing to me is that 2007 is
simply a test case (!). Someone (Congress?) gets to decide by 12/2007
whether this experiment was worth it, and we may (or may not) get to do it
again next year! And that change would only give 3 months notice to either
revert back to pre-2007 rules, or continue onward.
Bizarre.
--
-------------------------------------------------------------
Regards -
- Andrew
| |
|
| "John Richards" <jr70@blackhole.invalid> wrote:
<snip>
some,=20[color=darkr
ed]
>=20
> How do you figure that? The law was passed by our representatives in=20
> Congress as part of a worldwide effort toward reducing energy usage.=20
> Garmin has known about this change since August 2005.
> The change was coordinated with our neighbor Canada, and will be picked
> up by the European Union soon. Not exactly a spotty effort.
It may be for America and Canada which *might* share some similar (or at
least some job related) time effects by different seasons. But many =
other
countries don't share the same time zone's, different type of weather, =
don't
live by US law etc. so I don't think it's worldwide supported.=20
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| JBDragon 2007-03-18, 10:33 pm |
| "Jerry M" <moorheadbigj@aol.com> wrote in message
news:1173664911.189616.256760@t69g2000cwt.googlegroups.com...
> Many of garmins units like my 2610 did not get the software update for
> the new dates on daylight savings time. So if they are on auto setting
> still wont change until aprils old time change setting programmed in
> older software.
> Jerry
Yep even now my 2610 is a Hour behind. I guess everything will be fine once
it gets to the old DST date. It'll be both late to switch and early to
switch back later this year.
| |
| mike vore 2007-03-18, 10:33 pm |
| JBDragon wrote:
> "Jerry M" <moorheadbigj@aol.com> wrote in message
> news:1173664911.189616.256760@t69g2000cwt.googlegroups.com...
>
> Yep even now my 2610 is a Hour behind. I guess everything will be fine
> once it gets to the old DST date. It'll be both late to switch and
> early to switch back later this year.
>
My C320 hasn't been updated yet, but the time setting has 3 choices, Standard
Time, Daylight Time, and Auto. I just selected Daylight Time till I get
around to updating the firmware. Your 2610 may have the same choices.
--
Mike Vore
http://www.OhMyWoodness.com
http://mike.vorefamily.net/twr
| |
| Jack Erbes 2007-03-18, 10:33 pm |
| JBDragon wrote:
> "Jerry M" <moorheadbigj@aol.com> wrote in message
> news:1173664911.189616.256760@t69g2000cwt.googlegroups.com...
>
> Yep even now my 2610 is a Hour behind. I guess everything will be fine
> once it gets to the old DST date. It'll be both late to switch and
> early to switch back later this year.
>
Just go to the options menu, time, and click on Daylight Savings and it
will be right. The next time it is not right, go there and change it to
Off or Auto.
But I'm with you on the need for an update. The 2610 is going to go
down in history as one of the things that built the Garmin empire and
they will be used for many years to come. It is an insult 2610 owners
to not update the software.
Jack
--
Jack Erbes in Ellsworth, Maine, USA (jackerbes at adelphia dot net)
(also receiving email at jacker at midmaine dot com)
| |
| JBDragon 2007-03-19, 4:33 am |
|
"Jack Erbes" <jackerbes@adelphia.net> wrote in message
news:I7udnTRh49J8TGD
YnZ2dnUVZ_v2knZ2d@ad
elphia.com...
> JBDragon wrote:
>
> Just go to the options menu, time, and click on Daylight Savings and it
> will be right. The next time it is not right, go there and change it to
> Off or Auto.
>
> But I'm with you on the need for an update. The 2610 is going to go down
> in history as one of the things that built the Garmin empire and they will
> be used for many years to come. It is an insult 2610 owners to not update
> the software.
>
> Jack
I noticed today my GPS60 also has the same problem. I would have thought at
least the 2610 would have been FIXED since it was and still is a great
Navigation unit. A very popular unit sold by Garmin. I have no plans to
replace it any time soon either. Other then the TIME it works great. Maybe
this DST thing will change back for next year if it just doesn't work out
and then there won't be any problem.
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