Experimental data improves prediction of Thirty Meter Telescope segment warping harness correction

Carey Weisberg; Mark Colavita; Glen Cole; Carl Nissly; John Rogers; Matthias Schoeck; Byoung-Joon Seo; Mitchell Troy

doi:10.1117/12.2563129

21 December 2020 Experimental data improves prediction of Thirty Meter Telescope segment warping harness correction

Carey Weisberg, Mark Colavita, Glen Cole, Carl Nissly, John Rogers, Matthias Schoeck, Byoung-Joon Seo, Mitchell Troy

Proceedings Volume 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX; 114500W (2020) https://doi.org/10.1117/12.2563129
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Primary mirror segment shape correction via Warping Harness (WH) control adjustment is key to obtaining the required image performance of the Thirty Meter Telescope (TMT). We analyzed two separate experimental activities to better predict the segment WH performance. First, we took measurements of WH influence functions and Singular Value Decomposition (SVD) modes on a prototype TMT segment and compared these to model predictions. Second, we applied the TMT control algorithm on-sky at the Keck Observatory during their segment exchange and warping activities. We then used these measurements to improve our WH control simulations to include the observed effects. Altogether, the prototype segment measurements, on-sky TMT control algorithm measurements, and detailed simulation helped to better predict segment correction performance for TMT.

Conference Presentation

Citation Download Citation

Carey Weisberg, Mark Colavita, Glen Cole, Carl Nissly, John Rogers, Matthias Schoeck, Byoung-Joon Seo, and Mitchell Troy "Experimental data improves prediction of Thirty Meter Telescope segment warping harness correction", Proc. SPIE 11450, Modeling, Systems Engineering, and Project Management for Astronomy IX, 114500W (21 December 2020); https://doi.org/10.1117/12.2563129

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