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I have created a program (for inhouse use) to transform ITRF2020 epoch xxxx.xx positions (for example ITRF2020 2026.52 from RTX or OPUS) to NATREF2022 (ITRF2020 epoch 2020.00). However, I am not 100% clear on the sign conventions among other issues.
Is there a sample data set that can be used to test software? There is a blurb on one of the NGS pages saying that there will be a sample data set on github someday, but I can't find anything.
The beta NCAT that came out last week will transform NAD83 (2011) (and older datums) to NATREF2022 epoch 2020.00 but will not do any ITRF transformations (which seems odd that it is not there)
Posted : September 21, 2026 9:27 am
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It's going to be interesting for sure. The last opus and TBC data I got from OPUS and RTX declared the ITRF 2020 EPOCH to be 2026.6928.
Does that imply that there are 6928 EPOCH in 2026? or is that nomenclature indictive of something else?
AI declared that 2026.6928 means data was collected Sep 21, 2026 at 15:52:41 UTC.
The data was collected Sep 11, 2026 so that didn't help much.
I will be looking at some control points and shifts through the next few months. I'm in a stable part of the lower 48, Cali and Hawaii will be flying along I suppose.
This post was modified 3 minutes ago by MightyMoe
Posted : September 21, 2026 10:29 am