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The Infrared Solar Spectrum Measured by the SOLSPEC Spectrometer Onboard the International Space Station

Abstract : A solar spectrum extending from the extreme ultraviolet to the near-infrared is an important input for solar physics, climate research, and atmospheric physics. Ultraviolet measurements have been conducted since the beginning of the space age, but measurements throughout the contiguous visible and infrared (IR) regions are much more sparse. Ageing is a key problem throughout the entire spectral domain, but most of the effort extended to understand degradation was concentrated on the ultraviolet spectral region, and these mechanisms may not be appropriate in the IR. This problem is further complicated by the scarcity of long-term data sets. Onboard the International Space Station, the SOLSPEC spectrometer measured an IR solar spectral irradiance lower than the one given by ATLAS 3, e.g. by about 7 % at 1 700 nm. We here evaluate the consequences of the lower solar spectral irradiance measurements and present a re-analysis of the on-orbit calibration lamp and solar data trend, which lead to a revised spectrum.
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Submitted on : Thursday, June 18, 2015 - 5:29:04 PM
Last modification on : Tuesday, November 16, 2021 - 4:48:28 AM
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Gérard Thuillier, Jerry W. Harder, Alexander Shapiro, Thomas N. Woods, Jean-Marie Perrin, et al.. The Infrared Solar Spectrum Measured by the SOLSPEC Spectrometer Onboard the International Space Station. Solar Physics, Springer Verlag, 2015, 290 (6), pp.1581-1600. ⟨10.1007/s11207-015-0704-1⟩. ⟨insu-01164266⟩



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