[LEAPSECS] Problems with GPS?

[Tom Van Baak]

> So what I'm hearing is that the group is unaware of any specific  

> issues with civilian GPS units?


Rob,

In the past few months some civilian receivers experienced
glitches that were eventually correlated to changes made in
ground control software or something like that. The changes
were still ICD compliant but apparently they exposed latent
firmware bugs in a few gps receivers -- receivers that had
otherwise been working flawlessly for more than a decade.

Sorry, I don't have first-hand information on the problem.

This sort of thing seems to happen every few years. Most
recently recall that some receivers mishandled the 32 SV
boundary case. Prior to that there were Y2K and WNRO
fixes. Probably other cases as well; I don't have a full list.

/tvb