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. 2021 Sep 22;217(7):77. doi: 10.1007/s11214-021-00848-1

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 17 — EMIRS Noise Equivalent Spectral Radiance (NESR) precision plots. These figures illustrate the variation in instrument performance over temperature for both 2 (left) and 4 (right) second modes respectively. The lowest instrument temperatures (0 °C) provide the lowest performance likely due to a mechanical tilt movement of the EMIRS interferometer fixed mirror of <10 arcseconds. Due to the operational heaters mounted on the interface plate, the EMIRS is predicted to never dip below ∼10-15 °C and will always remain within ∼10-45 °C