[LEAPSECS] Problems with GPS?
Richard B. Langley
lang at UNB.ca
Fri Feb 12 10:30:55 EST 2010
-- Richard Langley
Quoting Tom Van Baak <tvb at leapsecond.com>:
> > So what I'm hearing is that the group is unaware of any specific
> > issues with civilian GPS units?
> 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.
> LEAPSECS mailing list
> LEAPSECS at leapsecond.com
Richard B. Langley E-mail: lang at unb.ca
Geodetic Research Laboratory Web: http://www.unb.ca/GGE/
Dept. of Geodesy and Geomatics Engineering Phone: +1 506 453-5142
University of New Brunswick Fax: +1 506 453-4943
Fredericton, N.B., Canada E3B 5A3
Fredericton? Where's that? See: http://www.city.fredericton.nb.ca/
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