[time-nuts] Re: What time scale does IGS use to report its clock files?

[Gabs Ricalde]

That would be the IGS timescale

K. Senior; P. Koppang; J. Ray
Developing an IGS time scale
https://doi.org/10.1109/TUFFC.2003.1209545

K. Senior
Clock Products Working Group
https://www.bipm.org/documents/20126/28434896/working-document-ID-5374/6a470f28-2d57-f5aa-01ce-08d5ff7c7339

On Tue, Oct 18, 2022 at 9:35 AM Skip Withrow via time-nuts
<time-nuts at lists.febo.com> wrote:
>
> Hello time-nuts,
> I have been doing some GPS PPP work (mostly with NrCan) and have a question
> as to what clock scale the IGS clock products are referenced to?
>
> I would assume that the GPS data is GPS time, which is steered by
> UTC(USNO).  So, clock solutions that I compute should be corrected by the
> difference between USNO and BIPM to get UTC.
>
> What about other satellite constellations?  I'm sure IGS keeps track of
> them as well.  And I'm sure that Galileo, Glonass, and the rest use
> different time scales.  Do IGS clk files represent the system that they are
> reporting, or is there some translation to a common time scale?
>
> I tried doing some research and did not come up with anything definitive.
> Any pointers in the correct direction would be appreciated.
>
> Thanks,
> Skip Withrow
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