[time-nuts] over-determined clock solution

Bob Camp kb8tq at n1k.org
Sat Jun 25 13:41:45 EDT 2016


Hi

As far as I know, it simply means that there are more satellites in view than needed for a fully accurate 
time to be determined. If it needs four sats to come up with a valid location plus time, it has five or
more. If it has five but is not happy with the location solution (still in survey etc) it likely is not going to be
happy with the time solution. At the other end of the status empire, you have TRAIM fail (or whatever 
a specific manufacturer calls it).  In that case you have multiple sats, but they don’t agree well enough
to figure out what time it is at all. 

Bob


> On Jun 25, 2016, at 10:07 AM, Steve <steve65 at suddenlink.net> wrote:
> 
> The phrase "over-determined clock solution" is used in the Trimble Thunderbolt user manual in describing operation of the Thunderbolt GPS receiver. The manual does not discuss the phrase in any detail, appearing to assume the reader understands its meaning. An internet search on "over-determined clock solution" did not turn up any substantive hits.
> 
> What does "over-determined clock solution" mean?
> 
> Thanks.
> 
> Steve, K8JQ
> 
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