over-determined clock solution
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
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@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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On 6/25/2016 9:07 AM, Steve 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
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
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and follow the instructions there.
Generally this means that more than the four required signals are used
to determine the result. Some sort of statisical fitler is used to
reduce the resulting measurement errors.
--
mailto:oz@ozindfw.net
Oz
POB 93167
Southlake, TX 76092 (Near DFW Airport)
Try overdetermined as one word. Also include GPS in the search string.
Google has many hits.
In timing receivers, once the position has been determined the receiver
switches to using timing information from all of the satellites that it
can see. Like the man with too many clocks, the clock time solution is
calculated from too many satellites.
That's what it looks like to me, anyway.
Bill Hawkins
-----Original Message-----
From: Steve
Sent: Saturday, June 25, 2016 9:08 AM
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
In this receiver mode all the satellites are used to compute the
timing solution. See page 80 of the 2012 Thunderbolt-E manual:
http://leapsecond.com/pages/tbolt/Thunderbolt-2012-02.pdf
This mode is available when the position of the antenna is known and
is stationary. Timing receivers usually take care of the initial
position survey at power-on and enter this mode automatically after
the survey is over.
On Sat, Jun 25, 2016 at 4:07 PM, Steve steve65@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
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
Thanks all for the info about the GPS over-determined clock solution,
helps me much. Bill's suggestion to internet search the term absent the
hyphen turns up numerous hits as well.
Steve, K8JQ
On 6/25/2016 2:10 PM, Bill Hawkins wrote:
Try overdetermined as one word. Also include GPS in the search string.
Google has many hits.
In timing receivers, once the position has been determined the receiver
switches to using timing information from all of the satellites that it
can see. Like the man with too many clocks, the clock time solution is
calculated from too many satellites.
That's what it looks like to me, anyway.
Bill Hawkins
-----Original Message-----
From: Steve
Sent: Saturday, June 25, 2016 9:08 AM
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
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.