Experimental Physics and
Industrial Control System

Philip Taylor <[email protected]> · Wed, 11 Feb 1998 15:18:00 +0000 (GMT)

It may not affect very many EPICS users but please be 
aware that if you are using a GPS based system for timing
or positioning purposes then you will need to check 
whether it will be able to cope with the '1999 GPS 
rollover'. This is independent of year 2000 
problems, but will probably break many systems during 
August 1999 if left uncorrected. The problem is due
to the week numbering field in the GPS date format
being only 10 bits wide.

Specifically, users of Bancomm GPS based VME cards
(eg bc637) using a built-in GPS receiver will need 
an upgrade if the board is more then ~2 years old,

Philip

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Philip Taylor, Royal Greenwich Observatory, 
Madingley Road, CAMBRIDGE. CB3 0EZ. UK
Email : [email protected]      Phone : (UK+) (0)1223-374710
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System