| Zugriffsnummer | 29014 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Stray light correction of array spectroradiometer data for solar UV measurements |
| Autor(in); Institution |
Nevas, Saulius; 4.1, Photometrie und angewandte Radiometrie, PTB-Braunschweig
Gröbner, Julian; Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Davos, SWITZERLAND
Egli, Luca; Physikalisch-Meteorologisches Observatorium Davos, World Radiation Center, Davos, SWITZERLAND
|
| Quelle/Jahr | UV News: the official Newsletter of the Thematic Network for Ultraviolet Measurements:(2013), 9, 17 - 19 |
| ISSN | 1456-2537 |
| Verlag | Helsinki: |
| Zusammenfassung | One of the highest uncertainty components in the measurements by array spectroradiometers is caused by a poor suppression of the spectral stray light. Provided that the stray light properties of an array spectroradiometer, i.e. the spectral response of the instrument to a monochromatic excitation, are known for any wavelength within the spectral range of the array spectroradiometer, a numerical improvement of the stray light suppression by one to two orders of magnitude is possible. The correction is, however, effective only as long as the spectral range of the instrument coincides with the spectral range of the array detector in use. The simplest way of taking care of this out-of-range (OoR) stray light would be by using bandpass filters or other spectral pre-selection techniques that block the OoR radiation at the entrance of the instrument. It is also possible to characterise the effects of the OoR stray light using tuneable laser sources. In contrast to the normal stray light characterisation procedure, however, an additional calibrated instrument is needed as reference for the OoR radiation measurements during the characterisation. In this UVNews issue we present such a work started within the EMRP project "Traceability for surface spectral solar ultraviolet radiation" and show preliminary results obtained for a solar UV spectroradiometer operated by the PMOD/WRC in Davos. |
