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Precisely locating your control network in absolute terms?
I am looking for opinions on the best methodology to bring in precise position and orientation into a control network.
This is mostly theoretical but let’s build off an example using the image I attached (TR ex.png) of a control network I did a common point least squares adjustment on.
I have four GNSS receivers at my disposal, I was thinking of setting up a total station on 13000 and setting a point to the north west in the open field and running rounds to it and a few other points in the network. Then setting up on 13003 and doing the same to a point to the south east.
Then setting a receiver on both of those points and two points in the middle on the existing network and running static observations for # hours.
Then using that data along with pulling Rinex from # CORS stations that surround the site and processing baselines.
Then either;
1. Bring all four of those vectors into Starnet and fit my current control to them, using appropriate weighting, or
2. Hold one of the static coordinates on lets say the North, and rotate to the static coordinate on the south, letting it float but holding the bearing. The advantage of this is that it should ensure the highest degree of relative accuracy considering the total station network should be tighter to itself versus what the static can provide. The other two static observations would float and be used as checks.
There isn’t any published horizontal control within traverse range, and we’ve already performed a closed level run to a nearby vertical benchmark.
Anything any of you would do differently?
What CORS stations would you use in the attached picture (FPRN surrounding stations.png)
What software do you like to use to process your baselines? I’ve used TBC in the past, I don’t have a license for it right now and $2000/yr seems on the steep side when all I would use it for is processing baselines. Are any of the open source packages any good?
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