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Kevin Samuel
Kevin Samuel
@kevin-samuel
Member
Joined: July 1, 2010 10:23 pm
Last seen: September 5, 2025 3:09 pm
Topics: 68 / Replies: 972
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RE: Collocation and Kalman filtering - references please

> Well, the necessary clarification is *how* a standard error estimate is derived.I doubt a reference on collocation and Kalman filtering would yie...

12 years ago
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RE: Testing ALTA Relative Positional Precision Standards

> ...This would, of course be true during all RTK demos, but never thereafter. :>:-D :good:

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

> Well, so far we haven't actually seen any posts from an unsophisticated user of least squares adjustments and error propagation software. Be sure...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

> > Will manipulating the stochastic model impact the magnitude of the error ellipses?> > You mean more exactly : "Will using unrealistic ...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

> > So you are saying, in the case of a single measurement (no redundancy), that one could not impact the magnitude of the error ellipses of pos...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

> ... or someone who really doesn't care what the correct answer is...Yes, I was thinking of an attorney!> > One could easily manipulate the ...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

In your example you are relying entirely on the stochastic model (error estimates) to yield an estimated error analysis (not an actual error analysis)...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

Let me revise that.> CONCLUSION:> Least squares adjustment is not possible needed."...As an example, consider the determination of a distance b...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

CONSTRUCTION OF THE MATHEMATICAL MODEL:r = n - n0c = r + uWHERE:n = number of measurementsn0 = minimum number of measurements for a unique solutionr =...

12 years ago
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RE: Using least squares adjustment on non-redundant measurements

> ...it is a mistake to say or imply that one can use least squares adjustment on non-redundant data. Details matter.:good:

12 years ago
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RE: RTK Surveying - Small Example

You know, with TDS survey pro one can log at a given elapsed time with RTK. Perhaps setting the RTK rover on a fixed height tripod logging and storing...

12 years ago
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RE: Confirm that brass!

Shelby, you just need to start a leveling campaign and put a RESET elevation on that puppy!

12 years ago
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RE: Confirm that brass!

Oh yeah! West side, different benchmark. We tied into the "west" BM.

12 years ago
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RE: Confirm that brass!

I know that mark! There is (used to be) an Army Corps bench mark by the boat landing just north of there.

12 years ago
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RE: OPUS Projects Workshops

As far as I know yes. You try contacting the folks doing the training to see if you could organize the training in your neighborhood. Find a day and v...

12 years ago
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RE: Interesting find in the field today...

I just noticed that this cap is mis-stamped! Should be "R11E"

12 years ago
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RE: Interesting find in the field today...

I wish!Perhaps the R10 was aesthetically influenced by the LOCUS!

12 years ago
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RE: Interesting find in the field today...

GIS grade positioning, equipment exceeds accuracy requirementsLocus units are paid forUsed all fixed HR tripods for ease of processing

12 years ago
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