Contractors using GPS rovers or automated machine guidance are making heavy use of GPS reference networks these days, and they are absorbing 3D data from satellites routinely. 



Contractors using GPS rovers or automated machine guidance are making heavy use of GPS reference networks these days, and they are absorbing 3D data from satellites routinely. While doing research for an upcoming article, I came across information that may call into question the accuracies of GPS reference networks. I believe these potential faults should be researched, evaluated, solved, standardized and regulated.

Editor's note: A version of this blog is also posted at www.rpls.com/blogs/2/22.