Show simple item record

SOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations

dc.contributor.authorMeftah, M.
dc.contributor.authorDamé, L.
dc.contributor.authorBolsée, D.
dc.contributor.authorHauchecorne, A.
dc.contributor.authorPereira, N.
dc.contributor.authorSluse, D.
dc.contributor.authorCessateur, G.
dc.contributor.authorIrbah, A.
dc.contributor.authorBureau, J.
dc.contributor.authorWeber, M.
dc.contributor.authorBramstedt, K.
dc.contributor.authorHilbig, T.
dc.contributor.authorThiéblemont, R.
dc.contributor.authorMarchand, M.
dc.contributor.authorLefèvre, F.
dc.contributor.authorSarkissian, A.
dc.contributor.authorBekki, S.
dc.date2018
dc.date.accessioned2018-04-05T11:59:39Z
dc.date.available2018-04-05T11:59:39Z
dc.identifier.urihttps://orfeo.belnet.be/handle/internal/6897
dc.descriptionContext. Since April 5, 2008 and up to February 15, 2017, the SOLar SPECtrometer (SOLSPEC) instrument of the SOLAR payload on board the International Space Station (ISS) has performed accurate measurements of solar spectral irradiance (SSI) from the middle ultraviolet to the infrared (165 to 3088 nm). These measurements are of primary importance for a better understanding of solar physics and the impact of solar variability on climate. In particular, a new reference solar spectrum (SOLAR-ISS) is established in April 2008 during the solar minima of cycles 23–24 thanks to revised engineering corrections, improved calibrations, and advanced procedures to account for thermal and aging corrections of the SOLAR/SOLSPEC instrument. Aims. The main objective of this article is to present a new high-resolution solar spectrum with a mean absolute uncertainty of 1.26% at 1σ from 165 to 3000 nm. This solar spectrum is based on solar observations of the SOLAR/SOLSPEC space-based instrument. Methods. The SOLAR/SOLSPEC instrument consists of three separate double monochromators that use concave holographic gratings to cover the middle ultraviolet (UV), visible (VIS), and infrared (IR) domains. Our best ultraviolet, visible, and infrared spectra are merged into a single absolute solar spectrum covering the 165–3000 nm domain. The resulting solar spectrum has a spectral resolution varying between 0.6 and 9.5 nm in the 165–3000 nm wavelength range. We build a new solar reference spectrum (SOLAR-ISS) by constraining existing high-resolution spectra to SOLAR/SOLSPEC observed spectrum. For that purpose, we account for the difference of resolution between the two spectra using the SOLAR/SOLSPEC instrumental slit functions. Results. Using SOLAR/SOLSPEC data, a new solar spectrum covering the 165–3000 nm wavelength range is built and is representative of the 2008 solar minimum. It has a resolution better than 0.1 nm below 1000 nm and 1 nm in the 1000–3000 nm wavelength range. The new solar spectrum (SOLAR-ISS) highlights significant differences with previous solar reference spectra and with solar spectra based on models. The integral of the SOLAR-ISS solar spectrum yields a total solar irradiance of 1372.3 ± 16.9 Wm−2 at 1σ, that is yet 11 Wm−2 over the value recommended by the International Astronomical Union in 2015.
dc.languageeng
dc.titleSOLAR-ISS: A new reference spectrum based on SOLAR/SOLSPEC observations
dc.typeArticle
dc.subject.frascatiPhysical sciences
dc.audienceScientific
dc.subject.freeSpace stations
dc.subject.freeThermal Engineering
dc.subject.freeAccurate measurement
dc.subject.freeEngineering correction
dc.subject.freeHigh-resolution spectra
dc.subject.freeInternational Space stations
dc.subject.freeSolar spectral irradiance
dc.source.titleAstronomy and Astrophysics
dc.source.volume611
dc.source.pageA1
Orfeo.peerreviewedYes
dc.identifier.doi10.1051/0004-6361/201731316


Files in this item

Thumbnail
Name:
Meftah(2018a).pdf
Size:
3.898Mb
Format:
PDF
View/Open

This item appears in the following Collection(s)

Show simple item record