HARMONI at ELT: an evolvable software architecture for the instrument pointing model

Gonzalo José Carracedo Carballal; Javier Piqueras López; Fraser Clarke

doi:10.1117/12.2629016

29 August 2022 HARMONI at ELT: an evolvable software architecture for the instrument pointing model

Gonzalo José Carracedo Carballal, Javier Piqueras López, Fraser Clarke

Proceedings Volume 12189, Software and Cyberinfrastructure for Astronomy VII; 121892G (2022) https://doi.org/10.1117/12.2629016
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Conference Poster

Abstract

HARMONI is the first light visible and near-IR integral field spectrograph for the ELT. To achieve its optimal image quality, an accurate measurement of the telescope’s pointing error is necessary. These measurements are affected both by systematic and random error contributions. To characterise the impact of the latter (as well as the performance of any necessary corrective model), simulations of the pointing error measurement process are required. We introduce harmoni-pm: a Python-based prototype which, departing from a geometric optics modelisation of the instrument, attempts to reproduce the main drivers of the instrumental pointing error. harmoni-pm features a software architecture that is resilient to instrument model refinements and enables performance analyses of corrective models based on simulated calibrations. Results showed that the relay optics are the main drivers of the instrumental pointing error (order 100 μm). Additionally, simulated calibrations of corrective models based on truncated Zernike expansions can compensate for systematic pointing errors up to a residual of order 1 μm.

Citation Download Citation

Gonzalo José Carracedo Carballal, Javier Piqueras López, and Fraser Clarke "HARMONI at ELT: an evolvable software architecture for the instrument pointing model", Proc. SPIE 12189, Software and Cyberinfrastructure for Astronomy VII, 121892G (29 August 2022); https://doi.org/10.1117/12.2629016

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