[LEAPSECS] it's WP7A week in Geneva

[Tom Van Baak]

> I've got a GPS receiver here. It reports UTC so, I presume, uses a stored

> delta until it picks up a new one. For the uses I have for it, an error of

> 1 or even 5 seconds (but not 30) is far more useful than "no data".


Clive,

Or it may be hard-coded; how do you know for sure? OK,
in your case you don't care; but not all cases are that easy.

This is the crux of the problem: you write "I presume". In my
experience, GPS receiver manufacturers don't know or don't
tell how they handle all the edge cases of getting UTC from
GPS time. So users who need ultra-reliable UTC from a GPS
receiver either have to guess, or actually test all the obscure
cases. This is non-trivial, given that real-life tests only happen
once every year or two.

/tvb