Development of the GMT telescope metrology system

Bo Xin; Bijan Nemati; Richard Demers; Patricio Schurter; Hugo Chiquito; William Schoenell; Josema Filgueira; Juan Pablo Haddad; Peter Thompson; Keath Beifus; Antonin Bouchez; Breann Sitarski; Joel Nissen; Heejoo Choi; Guillermo Gonzalez; David Nemati; Peter Williams

doi:10.1117/12.3020638

11 September 2024 Development of the GMT telescope metrology system

Bo Xin, Bijan Nemati, Richard Demers, Patricio Schurter, Hugo Chiquito, William Schoenell, Josema Filgueira, Juan Pablo Haddad, Peter Thompson, Keath Beifus, Antonin Bouchez, Breann Sitarski, Joel Nissen, Heejoo Choi, Guillermo Gonzalez, David Nemati, Peter Williams

Author Affiliations +

Proceedings Volume 13094, Ground-based and Airborne Telescopes X; 1309424 (2024) https://doi.org/10.1117/12.3020638
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

The Giant Magellan Telescope, with a 25.4m primary and operating from the ultraviolet to the long wave infrared, is being built as one of the next-generation Extremely Large Telescopes. The size of the GMT and its doubly segmented design create a unique set of challenges for telescope alignment, from initial alignment during the assembly, integration, verification and commissioning phase to operational alignment between and during the telescope exposures. GMT therefore includes a Telescope Metrology System (TMS) that uses networks of laser trackers and absolute and differential distance-measuring interferometers for improved alignment efficiency and phasing of the mirror segments. The TMS has successfully passed its Preliminary Design Review and entered the Final Design phase. In this paper we present the current design and expected performance of the GMT TMS.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Bo Xin, Bijan Nemati, Richard Demers, Patricio Schurter, Hugo Chiquito, William Schoenell, Josema Filgueira, Juan Pablo Haddad, Peter Thompson, Keath Beifus, Antonin Bouchez, Breann Sitarski, Joel Nissen, Heejoo Choi, Guillermo Gonzalez, David Nemati, and Peter Williams "Development of the GMT telescope metrology system", Proc. SPIE 13094, Ground-based and Airborne Telescopes X, 1309424 (11 September 2024); https://doi.org/10.1117/12.3020638

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