FWIW, In the late 1990s the Canadians developed a number of GPS Validation Networks. One example is described on this page: br>While some informal wor...

Plane trigonometry is not a good tool for these computations. I would approximate using the following methods listed in order of increasing accuracy a...

For some details about VERTCON see:br>This is a preprint graphics not included in the archive version linked from the NGS site.HTH,DMM

Also consider reviewing the materials atbr>They include a demo version as well as videos and documentation for the Columbus software package.As others...

Don't forget Shinkle and Dokka's NOAA TR 50Don't forget the Kurt Shinkle, Roy Dokka NOAA Technical Report:Rates of Vertical Displacement at Benchmarks...

Howdy,In his follow up to his original post he stated: "thats great! but what if I want to convert the lat lon and height for every sampling interval ...

The transformation between two well defined reference frames like NAD83(2001) and various versions of ITRF can be done with the NGS tool HTDP. It supp...

FWIW,Are you trying to compare within session NEU differences per epoch or between sessions?As for PPP tools, have you tried this one from NASA?The p...

Unfortunately even these large amounts are usually thought to be not worth consideration by the "powers that be." Small agencies like NGS face extinct...

Geoid short courseIf it was the IAG course, you can get the book. It isbr>Enjoy.Know some folks that attended previous classes. Neither were students ...

When computing a plane azimuth from an astronomic be sure to apply the Laplace correction as well as the convergence angle. There is, of course, a too...

You might also want to check the UNAVCO page at:br>Note reference to height differences of 2 to 40 mm.Enjoy,DMM

I realize I am not directly responding to your query but have you looked at these approaches:HTH,DMM

Does everyone know about NOAA's declination toolIt is here:

Relevant information and rambling on the topic of presenting complex information at convention workshops.Recommended free info:First link is by Dr Tom...

Pick one that hasn't been observed yetFWIW,As the name of the project indicates, make GPS observations on bench marks. Preferably points with valid NA...