STAR*NET V6 - Circe

Chapter 8 Analysis of Adjustment Output
10. Run a minimally constrained adjustment. If you are tying your survey to a number of
fixed points, start off with one fixed point and a fixed azimuth, or two fixed points,
until you have all of the data debugged. Then start fixing (with the “!” symbol) any
remaining fixed points one by one.
11. Run the adjustment but restrict it to a single iteration in the Adjustment Options.
Look at the changes in coordinates after the first iteration to see which stations seem
to be acting strangely.
12. Run the adjustment with the “Coordinate Changes each Iteration” listing option on,
then review that section in the listing looking for any unusual or excessive changes
in coordinates during adjustment.
13. Use the “.DATA OFF” and “.DATA ON” inline options to turn off sections of your
input data file. Break it down into pieces until you find the section where the errors
may reside.
14. Unweight observations that you suspect by using a standard error of “*”. Run the
adjustment and see if your problems go away. Remember that you will have much
more success with this technique if you have a number of redundant observations in
the survey.
15. If you have interconnected traverses, try disconnecting any suspect traverse, when
possible, by temporarily renaming its ending station name and removing its closing
angle. Turn it into an open ended traverse that will influence nothing else. See where
the end of the traverse moves to when you adjust. Do other traverses improve?
16. Run Blunder Detect. See Chapter 6, “Running Adjustments” for details.
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