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| Titel |
Mirror contamination in space I: mirror modelling |
| VerfasserIn |
J. M. Krijger, R. Snel, G. Harten, J. H. H. Rietjens, I. Aben |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 7, no. 10 ; Nr. 7, no. 10 (2014-10-07), S.3387-3398 |
| Datensatznummer |
250115925
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| Publikation (Nr.) |
 copernicus.org/amt-7-3387-2014.pdf |
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| Zusammenfassung |
| We present a comprehensive model that can be employed to describe and correct
for degradation of (scan) mirrors and diffusers in satellite instruments that
suffer from changing optical Ultraviolet to visible (UV–VIS) properties during their operational
lifetime. As trend studies become more important, so does the importance of
understanding and correcting for this degradation. This is the case not only
with respect to the transmission of the optical components, but also with
respect to wavelength, polarisation, or scan-angle effects. Our hypothesis is
that mirrors in flight suffer from the deposition of a thin absorbing layer
of contaminant, which slowly builds up over time. We describe this with the
Mueller matrix formalism and Fresnel equations for thin multi-layer
contamination films. Special care is taken to avoid the confusion often
present in earlier publications concerning the Mueller matrix calculus with
out-of-plane reflections. The method can be applied to any UV–VIS satellite
instrument. We illustrate and verify our approach to the optical behaviour of
the multiple scan mirrors of SCIAMACHY (onboard ENVISAT). |
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