[LEAPSECS] it's WP7A week in Geneva

[Tom Van Baak]

> Almost every GPS receiver also applies the UTC corrections to produce a 

> UTC time. Infact, many of them can't externally produce any other time 

> than UTC. Some has the ability to deliver GPS time or UTC time. Only a 

> fraction of the receivers made only use GPS time, but then for some 

> specific use.


It seems a lot of telecom applications use GPS time, avoiding
UTC altogether. Do you have any more information on this?

Your comments about GPS receivers and UTC need to include
the disclaimer. "after the receiver is powered up and after it has
achieved lock and after it has acquired the current UTC offset
from page 18 in subframe 4, which could be up to 12.5 minutes
later", then, yes, the GPS receiver will be able to produce UTC
reliably. But until that point, what the receiver actually produces
varies from model to model and also depends on how recently
the receiver was last used, etc.

/tvb