An interesting article on the issue of decimation of GPS data is here: Unfortunately, I do not know how NGS implements decimation.

The web link for the "Standard and Specs..." Document is: Also on the NGS site is Allen Pope's "statistics of residuals and detection of outliers" ava...

Why not also use Hatanaka compression?

i did not notice this earlier. Have you viewed: This is the GPS simulated observation generator. Description on page is pretty clear.Good luck,DMM

Glad to hear Dr Bock is still alive and kicking. I commend his great contributions to geodesy and lesser fields.Thanks for the correction and update M...

I am surprised to learn of his death. I note that the Scripps site does not indicate it. See: As I retired in 2008 (fully in 2013), I am officially ou...

BTW, Yehuda Bock's JGR article is available for free viewing/download at: I remember being quite impressed by the idea. With a solution for each epo...

FWIW,The IGS-CB site shows the accuracies and latencies of their orbit products here:Note that the traditional rule of thumb is that SVpositionError/d...

I can run teqc under Windoze 10 using Windoze PowerShell(x86). I use the teqc.exe executable. I copy the executable and the navigation and observation...

I do not take rejection criteria casually. As I age I seem to get even less flexible. My comments were with respect to "improving " GPS processing res...

You can download RINEX data files from the US NGS site at: CORS Data Products- National Geodetic SurveyOr do you want raw GPS receiver data?

As you saw in my link (to section 17 of the HTML version of the documentation), it is required that the wavelength factor of L2 squared receivers be a...

Just curious, does the RINEX file you create indicate that you have L2 squared data? A "2" should appear in the WAVELENGTH entry in the header file. S...

Of course the answer is: it depends.During the early years when there were not many SVs we had to be careful to not lose data. With the current conste...

FWIW,There is an option on the datasheet retrieval page NGS DATASHEET COUNTY FORMAllowing the retrieval of "Destroyed marks only".If the monument was ...

BTW, there is a new edition (4th) of Alfred Leick's GPS Satellite Surveying. There are now two co-authors. Looking at the table of contents on the Ama...

Dr. Chris Pearson, former NGS Advisor to Illinois, created the following: The PDF covers both the OPUS and OPUS-RS tools. N.B. the OPUS-RS tool does ...