TS Direction Standard Error = +/ 6"
> > > The calculation of the standard error of a direction in Star*Net with test directions of this sort simply consists of varying the standard error of a direction in the "Project Options" tab until the error factor for directions in the statistical summary is nominally 1.00.
>
> Ok. Got it! But my numbers aren't coming up the same. I'm still down at .470 Error Factor with a standard error for directions of 6.6". I'm still doing something wrong.
Why not post a screen capture of the dialogue box in which the standard error of a direction is input? My guess is that you may not have the instrument and target centering errors set to 0 as they should be.
> When you say:
> 
>
> Do you mean to go back into the data table and replace all of the assumed coordinates with the adjusted coordinates?
No. The asterisks following the coordinates of 02, 03, 04, and 05 in the input file denote values that are weightless, free to take on whatever value is most consistent with the observations adjusted.
TS Direction Standard Error = +/ 6"
>
> Why not post a screen capture of the dialogue box in which the standard error of a direction is input? My guess is that you may not have the instrument and target centering errors set to 0 as they should be.
You are absolutely correct, Sir. I had the Horizontal centering error set at .001. Set it to zero and got .902 (same as yours).
Now I can use this dat set to do exactly as you suggest...adjust the variables and get a feel for how the adjustments change.
This has been a great Learning exercise, Kent. Thanks very much!:-)
TS Direction Standard Error = +/ 6"
> This has been a great Learning exercise, Kent. Thanks very much!
It's worth underscoring that you now know more about the angular accuracy of your instrument than its manufacturer probably does.
Keep in mind that while instrument centering was set to 0 for the purposes of this test, in ordinary work there would be a centering error to be assigned. From your test, a standard error of 0.001 ft. for instrument centering would be realistic.
Target centering has yet to be determined.
TS Direction Standard Error = +/ 6"
> Target centering has yet to be determined.
Next on my list!;-)
Forgot to ask...
Why is there a circle (or round ellipse) of uncertainty around 01? I thought that was fixed. Why would there be any uncertainty in it's location at all?
