EGU21-15640, updated on 04 Mar 2021
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Optical frequency dissemination via fiber networks: The Clock Network Services (CLONETS) project and potential applications in the geosciences

Juergen Kusche1 and the CLOck NETwork Services - Design Study (CLONETS DS) Team*
Juergen Kusche and the CLOck NETwork Services - Design Study (CLONETS DS) Team
  • 1Bonn University, Astronomical, Physical and Mathematical Geodesy, Bonn, Germany (
  • *A full list of authors appears at the end of the abstract

Precise measurement of time and frequency has been instrumental in the development of modern geosciences. It has enabled us to quantify many observations, including plate motion, the variations of Earth rotation, and modern-day sea level rise.

Over the past decade, European National Metrology Institutes (NMIs), together with National Research and Education Networks (NRENs) and partners from universities and research institutes have pioneered the dissemination of ultra-stable optical frequency and timing signals via optical fibers. Initially started as proof-of-concept experiments, this technology has matured to aim for a paradigm change: making precise time and frequency signals available to the wider scientific community and thereby enabling new research avenues.

The CLOck NETwork Services Design Study (CLONETS-DS) is a research and innovation action intended to facilitate the vision of a sustainable, pan-European optical fiber network for precise time and frequency reference dissemination.

Here, we will present the envisioned technology, its performance parameters, and discuss potential applications, requirements and limitations for geophysical applications, for example in geodesy (chronometric levelling, gravity field observation), seismology, and very-long-baseline interferometry (VLBI).

CLOck NETwork Services - Design Study (CLONETS DS) Team:

Harald Schnatz, Tara Cubel Liebisch (Physikalisch-Technische Bundesanstalt, Braunschweig, Germany) Josef Vojtěch, Lada Altmannová, Vladimír Smotlacha, Radek Velc, Rudolf Vohnout (CESNET, Prague, Czech Republic) Vincenzo Capone, Tryfon Chiotis, Guy Roberts, Domenico Vicinanza (GÉANT Association, Amsterdam, Netherlands) Artur Binczewski, Wojbor Bogacki, Krzysztof Turza (Poznan Supercomputing and Networking Center, Poznan, Poland) Paul-Eric Pottie, Philip Tuckey (LNE-SYRTE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC, Paris, France) Davide Calonico (Istituto Nazionale di Ricerca Metrologica, Turin, Italy) Ronald Holzwarth, Benjamin Sprenger (Menlo Systems, Martinsried, Germany) Ondřej Číp, Lenka Pravdová, Šimon Řeřucha (Institute of Scientific Instruments of the CAS, v.v.i. (ISI), Brno, Czech Republic) Javier Díaz Alonso, Eduardo Ros Vidal (University of Granada, Spain) Trinidad García (Seven Solutions S.L., Granada, Spain) Jan Kodet, Ulrich Schreiber (Technical University of Munich, Germany) Jürgen Kusche, Dieter Meschede, Stefan Schröder, Simon Stellmer (Rheinische Friedrich-Wilhelms-Universität Bonn, Germany) Pawel Nogas, Robert Urbaniak (Piktime Systems sp. z o.o., Poznan, Poland) Przemysław Krehlik, Łukasz Śliwczyński (AGH University of Science and Technology, Cracow, Poland) Anne Amy-Klein (LPL, Université Sorbonne Paris Nord, CNRS, Villetaneuse, France) Nicolas Quintin (Réseau National de Télécommunications pour la Technologie, l'Enseignement et la Recherche, Paris, France) Alwyn Seeds (University College London, London, United Kingdom) Bruno Desruelle, Jean Lautier-Gaud, Vincent Ménoret, Martin Rabault (Muquans, Talence, France)

How to cite: Kusche, J. and the CLOck NETwork Services - Design Study (CLONETS DS) Team: Optical frequency dissemination via fiber networks: The Clock Network Services (CLONETS) project and potential applications in the geosciences, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-15640,, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.