1. Proposal for long station names in SINEX format Paul Rebischung Unified Analysis Workshop, Paris, July 2017
Good morning. So I’m going to talk about systematic errors in the daily IGS terrestrial fram solutions, which as you know, are the IGS input to the ITRF.

2. Motivation Increasing number of redundant 4-char GNSS station IDs
Example from DOMES database:
9-char station IDs are now used by the IGS, EPN…
4-char site ID + 2-digit station ID + 3-char country ID
Used to identify RINEX 3 files
Adopted or proposed in all IGS product formats:
SINEX Bias format v1.00
SINEX Tropo format v2.00
RINEX Clock format v3.04
Except « legacy » SINEX format…
DUND A 19117M001 Dundee, United Kingdom
DUND A 50212M003 Dunedin, NEW ZEALAND
DUND00GBR A 19117M001 Dundee, United Kingdom
DUND00NZL A 50212M003 Dunedin, NEW ZEALAND
We’ll first review the geocenter motion time series derived from these IGS daily solutions, then their scale. And then I’ll talk about errors in the individual station position time series. And finally, I have two topics that could be of interest for this workshop, but I’m not sure I’ll have time to cover them in 15 minutes:
The predictive quality of the ITRF2014 post-seismic deformation models after 2 years and a half of extrapolation,
And a comparison of the I, D and JTRF2014 polar motion series with geophysical data.

3. Solution 1
Define a 4-char ↔ 9-char correspondence, e.g. in a new block:
Backward compatibility
No impact outside IGS
4-char IDs become internal SINEX identifiers
Each AC free to use their own 4-char IDs
Potential source of errors / confusion
Cannot simply “grep” a particular station
Unclear, complicated to manage and use
+SITE/LONG_NAMES DUND A DUND00GBR
DUN1 A DUND00NZL
-SITE/LONG_NAMES
We’ll first review the geocenter motion time series derived from these IGS daily solutions, then their scale. And then I’ll talk about errors in the individual station position time series. And finally, I have two topics that could be of interest for this workshop, but I’m not sure I’ll have time to cover them in 15 minutes:
The predictive quality of the ITRF2014 post-seismic deformation models after 2 years and a half of extrapolation,
And a comparison of the I, D and JTRF2014 polar motion series with geophysical data.

4. Solution 2 Replace 4-char IDs by 9(+)-char IDs everywhere in SINEX
Impacts all techniques
Backward compatibility
Same convention as in SINEX Bias could be adopted:
Software could discriminate, based on SINEX version indicated in 1st line:
Clear, unambiguous, easy to implement
Unanimously preferred by IGS ACs
%=SNX 2.02 IGN 16:230:24329 […]
%=SNX 3.00 IGN 16:230:24329 […]
We’ll first review the geocenter motion time series derived from these IGS daily solutions, then their scale. And then I’ll talk about errors in the individual station position time series. And finally, I have two topics that could be of interest for this workshop, but I’m not sure I’ll have time to cover them in 15 minutes:
The predictive quality of the ITRF2014 post-seismic deformation models after 2 years and a half of extrapolation,
And a comparison of the I, D and JTRF2014 polar motion series with geophysical data.
Read 4-char IDs
Read 9-char IDs

5. Other potential additions to SINEX
Post-seismic (exp/log) parameters
Periodic signals
Official discontinuity block ?
We’ll first review the geocenter motion time series derived from these IGS daily solutions, then their scale. And then I’ll talk about errors in the individual station position time series. And finally, I have two topics that could be of interest for this workshop, but I’m not sure I’ll have time to cover them in 15 minutes:
The predictive quality of the ITRF2014 post-seismic deformation models after 2 years and a half of extrapolation,
And a comparison of the I, D and JTRF2014 polar motion series with geophysical data.