GLASS, a tool for quality-controlled GNSS Data and Products dissemination

Paul Crocker, professor from University of Beira Interior (UBI) and an EPOS TCS GNSS Data and Products member, presented a poster about GLASS at AGU Fall Meeting. The event, hosted from December 10th to 14th, at Walter E Washington Convention Center, had the poster presentation addressed at Hall A-C (Poster Hall) on Wednesday (December 12th, 2018), from 13:40 to 18:00 (Washington, D.C. time).

According to the abstract submitted, “Europe is covered by various networks of GNSS stations maintained by different agencies with different technical and scientific objectives. The EPOS-IP (European Plate Observing System – Implementation Phase) project aims to harmonize and standardize data collection and processing and to design and establish dedicated products and services that benefit the existence of national and pan-European infra-structures (in particular EUREF), optimized for Solid Earth Research applications”.

Paul Crocker (UBI) presenting the poster about GLASS at AGU Fall Meeting.Distributed software architecture – Therefore, the idea has been to present the efforts carried out by the members of EPOS TCS GNSS Data and Products to create a distributed software architecture called GLASS, a tool for quality-controlled dissemination within the EPOS. During the operational phase, to start in 2019, this shall provide GNSS data and derived products (coordinates, velocities and strain rates) from thousands of stations in Europe region.

Data flows – “We took the opportunity to describe the data flows from data suppliers and analysis centers to the various EPOS data portals and the integration into the overall EPOS system. In particular we have described the quality control steps that are performed in the GNSS Data and Products, from validating the station log files, obtaining quality metrics of RINEX files and their role in monitoring the overall system strength”, explains Paul Crocker.

Several analysis centers – According to Crocker, was also described how time series and other GNSS products computed at several analysis centers are compared and how the detection of outliers and verification of jumps are dealt with. In terms of Data and Product Dissemination had been detailed the overall software and portal components, the technologies that are used and resulting API’s and their descriptions in formal languages for integration into the central EPOS systems software and existing workflow.

Authors – The authors of this poster, entitled “GLASS, a tool for quality-controlled GNSS Data and Products dissemination”, are: Paul Crocker (UBI), Jan Dousa (Research Institute of Geodesy), Mathilde Vergnolle (CNRS), Carine Bruyninx (Royal Observatory of Belgium), Machiel Simon Bos (UBI), Rui Manuel Silva Fernandes (UBI), Benedikt Ofeigsson (Icelandic Met Office), Petr Bezdeka (Research Institute of Geodesy), Rui Cardoso (UBI), Rafael Couto (UBI), Andras Fabian (Observatoire Royal de Belgique), Juliette Legrand (Royal Observatory of Belgium), Khai-Minh Ngo (Géoazur – Université Nice Sophia Antipolis), Tim Sonnemann (University of Iceland) and Pavel Vaclavovic (GOP/RIGTC).

EPOS-IP is a project funded by the ESFRI European Union.

PDF icon GLASS: a tool for quality-controlled GNSS Data and Products dissemination.pdf

New way of GNSS data dissemination within the European Plate Observing System (EPOS)

The poster “New way of GNSS data dissemination within the European Plate Observing System (EPOS)” was presented by Jan Douša, member of TCS GNSS Data and Products, at IGS Workshop 2018, which has been held in China for the first time.

Hosted and organized by Wuhan University receiving assistance from the State Key Laboratory of Satellite Navigation System and Equipment Technology and sponsorship from relevant partners, the event entitled “Multi-GNSS through global collaboration” occurred from October 29th to November 2nd.

Jan Douša took the opportunity to explain – at the poster presentation – what is EPOS for, besides approaching GNSS data dissemination, which includes talking about GLASS software package. “The European Plate Observing System (EPOS) has been established to facilitate, harmonize and standardize data collection and processing for Solid Earth Research applications”, said Douša.

PDF iconNew way of GNSS data dissemination within the European Plate Observing System (EPOS)

EPOS TCS GNSS Thematic Core Service @ European Plate Observing System

On May 30th until June 1st, 2018, EPOS TCS GNSS Data and Products participated to the EUREF 2018 Symposium, which was hosted in Amsterdam, Netherlands. Therefore, to disseminate this Thematic Core Service, Rui Fernandes, coordinator for EPOS TCS GNSS Data and Products, had been chosen as a representative to speak about EPOS at EUREF Symposium. To leverage EPOS awareness, he started by reminding the audience that “EPOS is a long-term project for the integration of research infrastructures for Solid Science in Europe. Therefore, one of the three priority projects of European Commission within ESFRI”.

https://intranet.epos-ip.org/modules/file/icons/application-pdf.pngEPOS TCS GNSS Thematic Core Service @ European Plate Observing System

Tutorial on “G-Nut/Anubis”

On October 25th and 26th, 2017, EPOS GNSS Data and Products was one of the themes at Minutes of the EUREF AC Workshop, in Brussels. At the tutorial session, Jan Dousa, from EPOS GNSS Data and Products, had offered the tutorial on G-Nut/Anubis, beginning with an explanation about motivation for GNSS data quality control, approaching the goals of quality control and the process of data quality control.

“The motto is that scientific data collection is an irreversible process that needs to be controlled
and observed data properly qualified and quantified”, as Jan Dousa had stated from the
beginning of the speech.

https://intranet.epos-ip.org/modules/file/icons/application-pdf.pngTutorial on “G-Nut/Anubis”