GPS/PPM very large offset

[B&A Consultants]

Hello,

We are using an Uputronics GPS board on a pi2 with Gentoo Linux. The Pi2 
has no other function than delivering time to our machines. It has been 
working ok for some time, and NTP did use the GPS/PPS sources to get the 
time.

Not anymore, those two sources are considered invalid : they exhibit a 
*5 seconds* offset :

     remote           refid      st t when poll reach   delay   offset 
  jitter
xSHM(1)          .PPS.            0 l   37   64  377   0.0000 -5037.89 
40.8616
xSHM(0)          .GPS.            0 l   35   64  377   0.0000 -6062.86 
64.7098
+ntp-2.arkena.ne 138.96.64.10     2 u   63  128  377  35.5756 -45.4027 
18.6235
+ntp2.omdc.pl    194.29.130.252   2 u   92  128  377  37.6172 -66.1093 
13.2281
+ns2.pulsation.f 138.96.64.10     2 u   69  128  377  41.5538 -67.9308 
13.8565
*82-64-45-50.sub .GPS.            1 u   53  128  377  44.1221 -66.3172 
14.6149

Is such a huge offset « usual » ? What could it mean (hardware failure 
?). The Gps gets proper fixes, as per cgps (do not know if it's okay to 
attach a screen copy, will do if requested).

Thanks,
--
Pierre-Yves Bonnetain-Nesterenko
B&A Consultants - Sécurité informatique - www.ba-consultants.fr
Tel. : +33 (0) 563 277 241 - Fax : +33 (0) 567 737 829

--
B&A Consultants - Sécurité informatique - Conseils et audits
www.ba-consultants.fr
Tél : (0) 563 277 241 - Fax : (0) 567 737 829