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11 January 2020 Determining the thermomechanical image shift for the MIGHTI instrument on the NASA-ICON satellite
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Abstract

The Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) instrument on NASA’s Ionospheric Connection Explorer’s mission will measure neutral winds in the Earth’s thermosphere. We investigate how thermal changes to the instrument’s optical bench affect the relative position of the image recorded by the camera. The thermal shift is measured by fitting the image of a series of reference notches and determining their current position on the camera with subpixel precision. Analyzing ground-based calibration data, we find that the image position is not affected within the uncertainty of the analysis for the applied thermal changes. We also address the question of the analysis uncertainty with signal-to-noise ratio.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2020/$28.00 © 2020 SPIE
Kenneth D. Marr, Aidan S. Thayer, Christoph R. Englert, and John M. Harlander "Determining the thermomechanical image shift for the MIGHTI instrument on the NASA-ICON satellite," Optical Engineering 59(1), 013102 (11 January 2020). https://doi.org/10.1117/1.OE.59.1.013102
Received: 18 October 2019; Accepted: 20 December 2019; Published: 11 January 2020
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