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Cedar Rapids, Iowa | I've done a lot of testing on the IA DOT's RTN, which is Leica Spiderweb. I have seen zero benefit from the iMax solution, and I think they may as well just disable it. A single base station has been consistently more accurate than iMax, and with 2 or more additional satellites available. My testing has all been at a 10 mile baseline.
If you want to check the accuracy of both, you will need to capture position data from both solutions, then do some analysis of drift during the capture. I wrote some software to do the capture and analysis, which is available here:
http://lefebure.com/software/gpsutils/
-Lance
Edited by mx270a 9/18/2011 11:41
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RTK corrections, VBS or single base?
