[PROJ] Dealing with epoch and transformations

[Jack Riley - NOAA Federal]

Javier,

I received a response from Swift Navigation Support:

"Currently, Skylark Nx uses ITRF2020 epoch of the base station survey.
Those were done quite recently so it's near the current epoch (within a
year). We're planning to align all services to report the current epoch in
the future Skylark releases."

Jack

On Fri, Aug 23, 2024 at 5:36 AM Javier Jimenez Shaw via PROJ <
proj at lists.osgeo.org> wrote:

> I am a bit confused with the epoch of coordinates. For instance, if I
> connect to this NTRIP service
>
> https://support.swiftnav.com/support/solutions/articles/44002386941-configuring-your-receiver
> it says explicitly that "Skylark Nx RTK uses ITRF2020 reference frame."
> Does it mean that the coordinates that I measure today do have an epoch of
> 2024.x (today's epoch), or the epoch of those measurements is 2015.0 (the
> epoch of ITRF2020
> https://epsg.org/datum_1322/International-Terrestrial-Reference-Frame-2020.html
> )
>
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