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<p><font size="2">Dear colleagues,</font></p>
<font size="2">We invite active contributors to a <b>Technical
Workshop on storage and exchange formats for GNSS data</b> on
24–26 February 2026 in Coimbra, Portugal. The workshop is
co- organized by EarthScope (USA), Geoscience Australia, EPOS
(Europe), and the IGS Infrastructure Committee. The final
afternoon will be dedicated to prepare a white paper that sets out
technical recommendations and an implementation roadmap for common
GNSS data formats.<br>
<br>
<b>Scope and goals</b><br>
• Consolidate existing technical requirements for
next-generation GNSS data and metadata across archives and
processing centres, including use of cloud storage services.<br>
• Evaluate practical options beyond the file-per-session
convention, including chunked and columnar containers (e.g.,
TileDB, Iceberg, Parquet, Zarr), with attention to layout,
compression, indexing, and scalable access.<br>
• Define interoperability at the format and API layers to
enable reliable data exchange and tooling across organisations,
with a view toward federation of archives and services.<br>
• Produce a white paper with recommendations and an
implementation roadmap toward common formats.<br>
<b><br>
Who should participate</b><br>
Engineers and researchers working on GNSS data formats and I/O
software; people responsible for GNSS archives and storage
systems; and operators of real-time or post-processing systems.
This is a working meeting. Attendees are expected to contribute
substantively during the sessions and help deliver the white paper
and follow-on implementation tasks.<br>
<br>
<b>How to participate</b><br>
Participation form (online):
<a class="moz-txt-link-freetext" href="https://bit.ly/WorkShop_GNSSFormats">https://bit.ly/WorkShop_GNSSFormats</a> <br>
Please complete by November 30th, 2025.<br>
<br>
<b>Participation and logistics</b><br>
• In person<br>
• No registration fee<br>
• Participants self-fund travel, accommodation, and
subsistence<br>
<br>
On behalf of the organizing group,<br>
Rui Fernandes, Markus Bradke, Ryan Ruddick, David Mencin</font>
<p></p>
<pre class="moz-signature" cols="80">--
Rui Fernandes
Principal Investigator at UBI - University of Beira Interior
Coordinator of Instituto D. Luis @ UBI
Coordinator of SEGAL - Space & Earth Geodetic Analysis Laboratory
Coordinator of C4G - Collaboratory for Geosciences
<a class="moz-txt-link-freetext" href="https://orcid.org/0000-0002-9733-284X">https://orcid.org/0000-0002-9733-284X</a>
WhatsApp: +351 919999300</pre>
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