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20 August 2020 Recent developments in tolerancing methods for imaging spectrometers
Lori B. Moore, Holly A. Bender, Christine L. Bradley, Justin M. Haag, Sander Zandbergen, Robert O. Green, Pantazis Mouroulis
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Proceedings Volume 11488, Optical System Alignment, Tolerancing, and Verification XIII; 114880B (2020) https://doi.org/10.1117/12.2568857
Event: SPIE Optical Engineering + Applications, 2020, Online Only
Abstract
We discuss detailed tolerancing methods developed for imaging spectrometers at NASA Jet Propulsion Laboratory, California Institute of Technology using the Earth Surface Mineral Dust Source Investigation (EMIT) imaging spectrometer as an illustrative example. We tolerance five metrics simultaneously: along-track response function, crosstrack response function, spectral response function, spectral centroid uniformity, and spatial centroid uniformity. A method to calculate tolerancing sensitivities for each metric directly, a method to statistically combine Monte Carlo files from multiple tolerancing runs, and example summary error budgets that communicate the key and driving tolerances for each metric are discussed. These methods facilitate rapid and semi-automated assessment of the predicted performance of imaging spectrometer systems from design through to assembly and launch life cycle, using metrics that are directly relevant to the extraction of accurate spectroscopic data from these instruments.
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Lori B. Moore, Holly A. Bender, Christine L. Bradley, Justin M. Haag, Sander Zandbergen, Robert O. Green, and Pantazis Mouroulis "Recent developments in tolerancing methods for imaging spectrometers", Proc. SPIE 11488, Optical System Alignment, Tolerancing, and Verification XIII, 114880B (20 August 2020); https://doi.org/10.1117/12.2568857
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