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MOSAIC, the ELT multiobject spectrograph: positioners with integrated atmospheric dispersion correction

SPIE, the international society for optics and photonics (2026) 282

Authors:

J眉rgen Schmoll, Diane Chapuis-Kerouanton, Gavin Dalton, Louis Gabarra, Malak Galal, Ian Lewis, Myriam Rodrigues, Maxime Rombach, Daniel P Sablowski, Ellen Schallig, Markus Thurneysen, Alec York

MOSAIC, the ELT multiobject spectrograph: development and evolution of the instrument architecture and capabilities

SPIE, the international society for optics and photonics (2026) 242

Authors:

Gavin B Dalton, Myriam Rodrigues, Roser Pello, Kacem El Hadi, Mathieu Puech, Jurgen Schmoll, Jeff Lynn, Thomas Augusteijn, Meghna Mohamed, Mar铆sa Luisa Garc铆a-Vargas, Ana P茅rez Calpena, Walter Seifert, Wenli Xu, Ruben Sanchez-Janssen, Jay Stephan, Ian Lewis, Alondra Sola-Molina, Alessandro Meoli, Markus Thurneysen

Twinpicks: a graph-based performance simulation tool for the design phase of complex instruments

SPIE, the international society for optics and photonics (2026) 8

Authors:

Alondra Sol谩, Clement Hottier, Myriam Rodrigues, Cyril Pannetier, Jay Stephan, Tim Morris, Polly Gill, Muhammad Shaheer Niazi, Sven Toucheboeuf, Gauri Padalkar, Roser Pello, Mathieu Puech, Gavin Dalton, Alessandro Meoli, Christian Surace, Marrie Larrieu, Mar铆a Luisa Garc铆a-Vargas, Thomas Augusteijn, Kacem El Hadi, Ruben Sanchez-Janssen, Fatima De Frondat

WEAVE at the William Herschel Telescope: realising the on-sky performance of a 1000-fibre pick-and-place positioning system

Ground-based and Airborne Instrumentation for Astronomy XI SPIE (2026) 47-47

Authors:

Gavin Dalton, Scott Trager, Don Carlos Abrams, J Alfonso L. Aguerri, Piercarlo Binofacio, Antonella Vallenari, Esperanza Carrasco, Shoko Jin, Chris Benn, Ar奴nas Ku膷inskas, Kevin Dee, Ian Lewis, Remko Stuik, David Terrett, Sergio Pico, Ellen Schallig, Nic Walton, Mike Irwin, Alireza Molaeinezhad, David Murphy, Giuseppe d'Ago, Sarah Hughes, Jose Guerra, Jose San Juan, Marcello Lodi, Nauzet Hernandez, Cecilia Farina, Lilian Dominguez Palmero, Emanuel Gafton, Joel Concepci贸n, Lucia Su谩rez-Andr茅s, Neil O'Mahoney, Carlos Martin, Anke Ardern-Arentsen

MOSAIC at ELT: a first step towards an instrument control deployment over Europe

Proceedings of SPIE--the International Society for Optical Engineering SPIE, the international society for optics and photonics 14155 (2026) 56

Authors:

Marie Larrieu, Daniel Lecron, Alexandre Tzeou Hah Fauline, Fr茅d茅ric Panzano, Kacem El Hadi, Sebastiano Ligori, Vito Capobianco, Maria Isabel Carnerero, Olivier Boebion, Yan Caujolle, Adrien Malgoyre, Thomas Fenouillet, Paul Bohard, Francisco-Jos茅 Antunes, Jean-Philippe Rutault, Elodie Bourrec, Thierry Contini, Hermine Schnetler, Roser Pello, Thomas Augusteijn, Gavin B Dalton, Marisa Garcia-Vargas, Alessandro Meoli, Tim Morris, Mathieu Puech, Myriam Rodrigues, Rub茅n Sanchez-Janssen, Alondra Sola, Jay Stephan, Christian Surace

Abstract:

With 1300 movements, 160 sensors and a Ground Layer Adaptive Optics capability, MOSAIC, currently in the preliminary design phase, will be a large and complex instrument. At its very heart, the control system will monitor its health in real time and allow any instrumental reconfiguration for calibration, maintenance and science operations. MOSAIC instrument control is based on the ELT (Extremely Large Telescope) instrument Framework developed by ESO. The Assembly, Integration and Test (AIT) phase of the MOSAIC instrument will involve a large number of partners around Europe. The three main integration facilities will be Dwingeloo (Netherlands) for the visible spectrograph, Madrid (Spain), for the two near infrared spectrographs, and Marseille (France), for the front-end part of the instrument. The general instrument validation site in Europe is not identified yet and there is a risk that no suitable facility is found. To mitigate this risk, a preparation of a distributed AIT concept is carried on. It consists in testing the deployment of the main elements of MOSAIC control (Programmable Logic Controllers, Detector Workstations and Instrument Workstations) over the three main sites mentioned above, interconnected with each other via a secured Ethernet connection. In this paper, we present the benefits and risks of this novel AIT approach, the selection of a network remote access principle and preliminary results obtained in simulation and with hardware in the loop, between different testing sites in Europe.