[LEAPSECS] Problems with GPS?

[Richard B. Langley]

More info:
<http://www.gpsworld.com/gnss-system/news/aep-55c-update-update-bugs-identified-being-fixed-9525>
-- 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?

> 

> 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

> 

> 

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> 



===============================================================================
 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/
===============================================================================