Tomtom BST/GMT

Should the Tom Tom (XL, App 7.162) ) update the time its self, or do we have
the enter BST our selves?

In my case I had to do it my self. Could it be I did not wait long enough?

Mike

wrote:


The clock will never change automatically, you must do it manually when you
travel to another time zone or for the clock change on the seasons.

Tony

On Thu, 03 Apr 2008 11:08:32 +0100, "Anthony R. Gold"


Why? I thought the data from the satellites included the time.

wrote:


Yes, but the satellite time signal, known as GPS time, is based on UTC
(GMT) as that existed from January 1980 through July 1981. Since then UTC
has inserted a number of leap seconds to keep UTC noon aligned with the
sun's highest position in the sky but GPS time does not, so GPS time is now
14 seconds ahead of UTC. This one particular offset is announced by the
GPS satellites in their NAV messages, so it's simple for a GPS receiver to
calculate UTC/GMT. But the satellite signals contains no information on if
and when different countries change their clocks from standard time to
daylight/summer time.

The satellite's second pulses are accurate to around 350 nanosecond (one
third of a microsecond) but then the user's equipment has to figure out
which legal second in that time zone the satellite's pulse is striking :-)

This display is cute: http://www.leapsecond.com/java/gpsclock.htm

Is that boring enough?

Tony

I agree with you there.
It also knows where you are, so should know what timezone you are in
and when it gets dark, so should be able to auto switch day/night
colours too.


--
There are 10 types of people in the world, those that
understand binary and those that don't.