An efficient method for image based coarse alignment of a segmented space telescope

23 August 2024 An efficient method for image based coarse alignment of a segmented space telescope

Carl Nissly, Frank Dekens, Andrew G. Kee, Luis Marchen, Catherine Ohara, Phillip K. Poon, David Redding, Lewis C. Roberts Jr., Jonathan Tesch, Mitchell Troy

Author Affiliations +

Proceedings Volume 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave; 130925S (2024) https://doi.org/10.1117/12.3017872
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Conference Poster

Abstract

We propose an approach for coarse alignment of a segmented space telescope using science instrument images. The recommended steps go from large post launch rigid body misalignments to within the capture range of coarse phasing where segment piston error is the predominant residual wavefront error. These steps include five data collection and analysis methods comprising of metrology capture, segment capture and identification, segment translation, segment stacking, and fine alignment. Using a proposed architecture for the NASA Habitable Worlds Observatory (HWO) we describe the details of our recommended approach for each telescope alignment step. We then compare this recommended sequence to alternative alignment progressions used in existing segmented testbeds and telescopes in terms of number of data collections required. This model-based demonstration establishes that the recommended coarse and fine alignment sequence performs more efficiently in time and resource cost, handing off to coarse and fine phasing activities further along the telescope commissioning process.

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

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Carl Nissly, Frank Dekens, Andrew G. Kee, Luis Marchen, Catherine Ohara, Phillip K. Poon, David Redding, Lewis C. Roberts Jr., Jonathan Tesch, and Mitchell Troy "An efficient method for image based coarse alignment of a segmented space telescope", Proc. SPIE 13092, Space Telescopes and Instrumentation 2024: Optical, Infrared, and Millimeter Wave, 130925S (23 August 2024); https://doi.org/10.1117/12.3017872

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