LS Vector Data in Star-Net

Tyler

Member
I tried this with a small (about 250' N-S) project I did recently:

I had 4-minute RTN observations on points 1 (just to the left of 4), 2 and 3. I weighted the RTN coordinates at 1.00' in all 3 dimensions. Here are the results:

Is this what you mean by weighting the coordinates?
9848


I must be doing something wrong because it is exceeding positional tolerance significantly.
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Jim Frame

Well-Known Member
I must be doing something wrong because it is exceeding positional tolerance significantly.
The large RTK coordinate standard error values are blowing up the positional tolerance check. I got the same thing on my end. But it's not realistic because the error values aren't realistic. Try it with the vectors enabled (and no big RTK coordinate error values) and see what you get. With my project (the real one, not the test) the actual/allowed ratios are all below 0.4.
 

Tyler

Member
The large RTK coordinate standard error values are blowing up the positional tolerance check. I got the same thing on my end. But it's not realistic because the error values aren't realistic. Try it with the vectors enabled (and no big RTK coordinate error values) and see what you get. With my project (the real one, not the test) the actual/allowed ratios are all below 0.4.
It works nicely when the vectors are applied. All connections are passing the tolerance check.
9851

9852

Still failing angles on the lower bounds.. may need to reassess the instrument settings. Pretty consistently around twice the error factor on GPS deltas as well. Even when factoring the StdErr by 1.5 horiz and 3.0 vertical.
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Jim Frame

Well-Known Member
Still failing angles on the lower bounds.. may need to reassess the instrument settings. Pretty consistently around twice the error factor on GPS deltas as well. Even when factoring the StdErr by 1.5 horiz and 3.0 vertical.

I generally scale RTK errors by 2.0, so I think you're a bit tight at 1.5. But given the small size of the network, I wonder as well about the RTK plumbing error. Lots of RTK poles use 40-minute bubbles, which doesn't matter much if you're breaking down a section, but in a small network they can throw in a lot of slop where it matters.
 

Kevin Dowd

New Member
Attempting to export GPS vectors for the first time.
I am receiving a No Base error message.
Observations collected using an RTN.
Any ideas on fixing this?
 

T.Guisewhite

Active Member
Yeah that should do it for you...however I’ve not done it with just the RTN...I’ve only pulled the vector data from an on-site base. It gives the same error though so I’m curious what you get as far as the virtual base point?
 
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