Also, if you always point your gps pole the same direction, it tends to eliminate pole bubble error.
If your pole bubble is off 0.02' @ 2 meters height, and you observe ctrl station number 1, facing north, then ctrl station no. 2 facing south, you just threw 0.04' horizontal error between these 2 pnts.?ÿ
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Shoot points twice with the same point number, rotating the rod 180?ø in between. That should tend to average out error due to pole plumbing. If the variance between the two is as much as 0.02' it's time to adjust the bubble or increase the time on station. I generally get about 0.01' "splits" with a pair of 15 second occupations taken within a minute of each other.?ÿ
I take two consecutive 10 or 15 second shots, rotating 180 between. I consider that one observation. If there is no other check I return under a different constellation and repeat. That has worked for 20 years so I'm going to call it good procedure...
Just like friends don't let friends scale without truncating, friends should not let friends set controls with poles and bi-pods.?ÿ If your going to set a gun up on it you might as well set it with a tri-pod.
It is possible to have a VRN or VRS position showing 8-10 satellites, but if you are at that point in the field it is possible due to poor horizon and/or multipath to have only 4-6 on your RTK station. All that possible accuracy is wasted and you have to understand why you are wasting it. Given you have a VRS or VRN if you have saved your observations there is something else you can do and you may think this is crazy but it has proven to be not crazy. Switch to an L1 only solution, you may have 2 - 3 satellites in your data that are only registering L1 and never getting around to find an L2 solution. Since you VRS or VRN gives you short vectors, L1 only is perfectly acceptable, and I have had cases were my L1 only solution was better than L1/L2 even with the same number of satellites.
However since I have yet to see any post processing questions that may be out of your wheelhouse.
Paul in PA
@ everyone
Thanks for all the replies! I need to do some research and figure everything out.
Oops! I didn't word that real good.
N
