Can't get it to work....OK, so there aren't any instructions on how to get TBC to recognize the files. I made a new ngs_antennas.atx file from the atx...

Jim: I was not aware of that. I had looked through the config directory, and, not seeing any large files, made the assumption that TBC would not use t...

Thanks for getting in touch with Peter. We go way back, first met him in 1986 on the first GPS job I ever did, which was for the company he worked for...

I use grads in all my field work because it is so much easier to deal with programatically (no need to convert from DD.MMSS to DD.ddddd, etc). 100 is ...

Alan: I have been using the igs absolute model. I believe they have more rigorous methods of testing and modeling, but probably the difference between...

Thanks, Jim. The trimble doc is somewhat helpful, but doesn't tell you how to make the .pct (or .ngs, or .ife) files. I do remember readings Peter's w...

What I have found out is that a dual frequency system will give the depth to various layers. We have a single frequency only system. And there are "su...

I thought about that, Steve. It would have to be a frequency that penetrates the silt but not the solid ground.

I told him one way was to probe to solid, but that would best be done on a flat boat with a small drill rig or something similar. I did do a silt samp...

I think there is some confusion regarding OPUS Projects. It is not the same as bluebooking. The results will not be published on datasheets (not autom...

Chris: t is not real heavy. Easy to carry. Never had a problem with it in the wind, but I probably never used it in real high winds. We have an S6 hig...

here is what we use, from seco (5216-00). I have been using this for deformation surveys for almost 9 years now. Also great for a lot of other work. T...

Loyal inferred it...a properly established coordinate is just as good as if not better than a physical monument which can easily disappear. However, a...

mini prism with robotic total stationExcept for topo, I almost always use a seco mini prism with my robotic S6. There is more potential error in a 360...

Jim: what emulator are you using? I need something that will run on windows 7.

That is a ZNL, a zenith nadir plummet. A much more accurate way to center a tribrach over a point than using a standard optical plummet. I have an old...

repro trick for pencilKind of on a tangent, but...The local recorder of Deeds office (Allegheny County PA) has most of its information in paper deed b...

What's an ARK2Dave: here are some pics of my ARK2. I have used it underground a few times, both in the US and in South America. Through the scope...