Last November (13th to 15th, 2017), Aline Déprez, from EPOS GNSS Data and Products and Ingénieure CNRS (ISTerre - Institut des Sciences de la Terre, Université Grenoble Alpes), attended the Colloque G2 2017 Géodésie – Rhéologie, an event hosted at Nice University.
In the oral presentation entitled “Massive GNSS processing in double difference in the framework of the EPOS-IP project”, Déprez exposed the EPOS project, explaining its phases, objectives and architecture.
After this brief explanation about EPOS, Déprez presented the processing of a massive data set (1360 sites on 18 years) using the double difference method via the GAMIT-GLOBK software. This analysis, conducted on a high computing platform hosted at UGA (called CIMENT), included different steps, which are: a splitting of the big data set in sub-networks, the GAMIT processing for each couple day/sub-network and the daily combination. Following this presentation of the processing, the available products (position time-series, velocity field and strain rate map) and the way to obtain them were showed.
“We succeeded in this up-scaling challenge and generated from a big data set the usual GNSS products: position time series + horizontal and vertical velocity fields”, revealed Déprez adding that automatic derivation of strain rate is well on the way and that real-time processing could be also considered.
“We are almost ready to make GNSS products available to advance research in Earth Science
domain”, has highlighted.
About G2 – The G2 national community (Geodesy - Geophysics) brings together geodesists and geophysicists. Every year since 2003, this community has been meeting for four half-days to discuss national issues and themes of international dimensions. It is an opportunity to address high-level scientific topics while promoting the participation of young researchers, post-docs and doctoral students.
Massive GNSS processing in double difference in the framework of the EPOS-IP project
Royal Observatory of Belgium (ROB) seeks a collaborator for its GNSS activities, which will involve support to ROB’s GNSS-related EPOS services at IT as well as scientific level. The ROB is currently involved in the development of the Global Navigation Satellite Systems (GNSS) component of EPOS. This component will consist of a European network of more than 3000 GNSS stations to monitor ground movements in Europe.
The GNSS Product portal has gained a fresh and modern design improving the user experience (UX). “The initial design and usability were deprecated, therefore we decided to reformulate it”, says André Rodrigues, from UBI and the developer in charge of portal redesign. According to Rodrigues, besides having minor details such as a “welcome screen”, the reformulation implied a new design taking into consideration user interface and usability.
The reviewed professional and scientific magazine GaKo published an article coauthored by Petr Bezděka and Jan Douša entitled "European Plate Observation System and Connection of Geodetic Data and Services from the National Infrastructure CzechGeo" (translation adapted from the original, in czech, "Evropský Observační Systém a zapojení geodetických dat a služeb z národní infrastruktury CzechGeo, Geodetický a kartografický obzor"). Monthly released, Geodetic and Cartographic Review (GaKO) is a national geodetic journal of the Czech Office for Surveying, Mapping and Cadastre (CÚZK) and Geodesy, Cartography and Cadastre Authority of the Slovak Republic (ÚGKK SA). Besides, it is recognized in the Research Information Registry (RIV).
