On 2015-05-05 11:58, Tom Van Baak wrote:
And now I guess we can't blame Trimble either since their 15-year old Ace
documentation [1] says:
----
ACE III GPS
System Designer Reference Manual
Part Number: 41265-00
Revision: A
Date: June 2000
Firmware: 8.08
....
3.5.1 Effect of GPS Week Number Roll-over (WNRO)
The ACE III GPS module has been designed to handle WNRO, and there are no
problems
with either dates or first fix after WNRO through the year 2015.
Caution Trimble OEM GPS receivers have reported the true GPS Week Number
in TSIP
messages 0x41 and 0x8F-20 as a number between 0 and 1023. The ACE III GPS
outputs
the Extended GPS Week Number as the absolute number of weeks since the
beginning of
GPS time or 06 January 1980. If the true GPS Week Number is desired, the
system
developer should ignore the extra MSBs of the Extended GPS Week Number and
use only
the 10 LSBs.
From that, I would say we can blame Trimble as they receive the extended week
number which
supports operation up to 2137, but says there will be problems in 2015.
Does anyone on the list know how well the http://www.heoldesign.com replacement
works?
Hopefully the upgrade supports operation after 2015, but it still may not work
if the
Tymserve 2100 does not handle the increased range. Neither the Holodesign N024
nor the
Trimble Copernicus II manuals state any limits similar to that in the ACE III
manual.
--
Take care. Thanks, Brian Inglis
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