Stefano Condio¹, E. Anne Curtis⁵, Simone Donadello¹, Sören Dörscher⁴, Chen-Hao Feng⁵, Melina Filzinger⁴, Jacques-Olivier Gaudron⁵, Rachel M. Godun⁵, Irene Goti¹, Ian R. Hill⁵, Wei Huang⁵, Nils Huntemann⁴, Matthew Johnson⁵, Joshua Klose⁴, Jochen Kronjäger⁴, Alexander Kuhl⁴, Rodolphe Le Targat², Filippo Levi¹, Burghard Lipphardt⁴, Christian Lisdat⁴, Jerome Lodewyck², Olivier Lopez³, Helen S. Margolis⁵, Maxime Mazouth-Laurol², Alberto Mura¹, Benjamin Pointard², Paul-Eric Pottie², Matias Risaro^1,5, Billy I. Robertson⁵, Marco Schioppo⁵, Kilian Stahl⁴, Martin Steinel⁴, Alexandra Tofful⁵, Mads Tønnes², and Jacob Tunesi⁵

• ¹Istituto Nazionale di Ricerca Metrologica (INRIM), Strada delle Cacce 91, 10135 Torino, Italy
• ²Laboratoire Temps Espace (LNE-OP), Observatoire de Paris, Université PSL, Sorbonne Université, Université de Lille, LNE, CNRS, 61 avenue de l’Observatoire, 75014 Paris, France
• ³Laboratoire de Physique des Lasers (LPL), Université Sorbonne Paris Nord, CNRS, 99 Avenue Jean-Baptiste Clément, 93430 Villetaneuse, France
• ⁴Physikalisch-Technische Bundesanstalt (PTB), Bundesallee 100, 38116 Braunschweig, Germany
• ⁵National Physical Laboratory (NPL), Hampton Road, Teddington TW11 0LW, United Kingdom

• ^*Contact author: m.pizzocaro@inrim.it