This is a great paper with a lot of information and contains some general overviews of more in-depth papers. The prospects for OPUS are pretty excitin...

Regarding reference epochs and changing coordinates in 2022, I just found this from a recent paper by NGS:?ÿ Blueprint for 2022 Part 3: Working in the...

I'm not sure how time (velocities) will be handled. I don't know if NGS will periodically pick epochs or if everything will always be current epoch. E...

I don't see any pressing need to change the rules of comparative dignity of calls, but maybe someday. Monuments will always hold (at least for many ye...

As far as staying "within their lane" goes, the US Constitution leaves establishing weights and measures to the Federal government, not the State gove...

I heard the same from Michael. I can't fault his argument. As you say, from a software perspective, we'll have to support both indefinitely. I'm wonde...

Just because, hypothetically speaking, NGS provides metric only coordinates, doesn't mean your project can't be in feet (US or International), and you...

It seems dangerous to me. A 2ppm difference is enough to go unnoticed. A coordinate value in of 1,000,000 feet will change by two feet with the wrong ...

It does seem like the board could be bigger allowing for more diversity of opinion, but mostly these board members need to be able to determine if the...

I'm pretty sure that's exactly why the Sunset Commission is bringing the hammer down, Andy. It seems like a lateral move to me. By the way, maybe I ha...

If that becomes the case then that will be a fight that will need to be had. I don't really see passing out stamps to engineers. That happened in the ...

I've struggled to understand why I should care, honestly. I don't have a great deal of confidence in the TBPLS to police the profession. ?ÿ I'm not su...

Make sure that you are using this address: ?ÿ ?ÿ It's the DPOS site that allows for RINEX uploads. ?ÿ ?ÿ

Quite possibly. Contact the Area TxDOT office. They've always been helpful.?ÿ

Thank you, Dave. I'll pass that along!

It certainly appears to be the case, Lee, that RTX is using the 14-parameter transformation.?ÿ Part of the problem is that the 14 parameters treat the...

The 14-parameter transformation is a standard seven-parameter Helmert transformation that also adds time to each of the seven parameters. The seven pa...

I think that Trimble is using the 14-parameter transformation for ITRF to NAD83, whereas NGS uses HTDP (Horizontal Time Dependent Transformation). I j...

My understanding from the developer is that the report gives "a value that equals : sqrt(sqr(SigmaX) + sqr(SigmaY) + sqr(SigmaZ)), where SigmaX, Sigma...