دورية أكاديمية
Removal of straylight from ExoMars NOMAD-UVIS observations
| العنوان: | Removal of straylight from ExoMars NOMAD-UVIS observations |
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| المؤلفون: | Mason, Jonathon P., Patel, Manish R., Leese, Mark R., Hathi, Brijen G., Willame, Yannick, Thomas, Ian R., Wolff, Michael J., Depiesse, Cédric, Holmes, James A., Sellers, Graham, Marriner, Charlotte, Ristic, Bojan, Daerden, Frank, López-Moreno, José Juan, Bellucci, Giancarlo, Vandaele, Ann Carine |
| المساهمون: | Ministerio de Ciencia e Innovación (España), European Commission, Belgian Science Policy Office |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2022 |
| المجموعة: | Digital.CSIC (Consejo Superior de Investigaciones Científicas / Spanish National Research Council) |
| مصطلحات موضوعية: | Straylight removalUltraviolet, Visible spectroscopy |
| الوصف: | This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0Test/). ; We present an in-flight straylight removal method for the Ultraviolet and Visible Spectrometer (UVIS) channel of the Nadir and Occultation for Mars Discovery (NOMAD) instrument aboard the ExoMars Trace Gas Orbiter (TGO). The presence of a ‘red-leak’ straylight signal in the UVIS instrument was discovered post-launch in ground calibration measurements of spectral lamps; UVIS observations of lamps with negligible UV light emission (RS12) showed a significant signal at UV wavelengths. Subsequent analyses of nadir observations of the martian atmosphere revealed that at UV wavelengths the red-leak straylight was in excess of 300% of the true UV signal, jeopardising the primary science observations of the instrument (retrievals of atmospheric ozone). By modifying the UVIS readout method to obtain a region of interest around the illuminated region on the Charge-Coupled Device (CCD) detector, instead of a binned one-dimensional spectrum, and utilising straylight profiles derived from measurements of the RS12 calibration lamp we show that the majority of the straylight at UV wavelengths can be successfully removed for the nadir channel in a self-consistent manner. The corrected UVIS radiances are compared to coincident Mars Color Imager (MARCI) instrument observations with residuals between the two instruments generally remaining within 15%. © 2022 The Authors. Published by Elsevier Ltd. ; The NOMAD experiment is led by the Royal Belgian Institute for Space Aeronomy (IASB-BIRA), with Co-PI teams in the United Kingdom (Open University), Spain (IAA-CSIC) and Italy (INAF-IAPS). This work was enabled through UK Space Agency grants ST/V002295/1, ST/V005332/1, ST/S00145X/1 and ST/R003025/1, and this project acknowledges funding by the Belgian Science Policy Office (BELSPO), with the financial and contractual coordination by the ESA Prodex Office (PEA 4000103401, 4000121493), by Spanish Ministry of Science and Innovation ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0032-0633 1873-5088 |
| العلاقة: | #PLACEHOLDER_PARENT_METADATA_VALUE#; info:eu-repo/grantAgreement/MICINN//SEV-2017-0709; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PGC2018-101836-B-I00/ES/CARACTERIZACION DE LA ATMOSFERA DE MARTE CON LOS INSTRUMENTOS NOMAD Y ACS A BORDO DE TGO%2FEXOMARS/; info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-87143-R/ES/ESTRUCTURA, PROCESOS Y CLIMA DE LAS ATMOSFERAS DE LA TIERRA Y EXO-PLANETAS/; Publisher's version; http://dx.doi.org/10.1016/j.pss.2022.105432Test; Sí; Planetary and Space Science 218: 105432 (2022); SEV-2017-0709; http://hdl.handle.net/10261/286258Test; http://dx.doi.org/10.13039/501100000780Test; http://dx.doi.org/10.13039/501100004837Test |
| DOI: | 10.1016/j.pss.2022.105432 |
| DOI: | 10.13039/501100000780 |
| DOI: | 10.13039/501100004837 |
| الإتاحة: | https://doi.org/10.1016/j.pss.2022.105432Test https://doi.org/10.13039/501100000780Test https://doi.org/10.13039/501100004837Test http://hdl.handle.net/10261/286258Test |
| حقوق: | open |
| رقم الانضمام: | edsbas.FB83A1D1 |
| قاعدة البيانات: | BASE |
| تدمد: | 00320633 18735088 |
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| DOI: | 10.1016/j.pss.2022.105432 |