Title
Sentinel 5 instrument and UV1 spectrometer subsystem optical design and development
Author
Köhler, J.
Jansen, R.
Irizar, J.
Sohmer, A.
Melf, M.
Greinacher, R.
Erdmann, M.
Kirschner, V.
Pérez Albiñana, A.
Martin, D.
de Goeij, B.T.G.
Vink, H.J.P.
Day, J.P.R.
ten Bloemendal, D.
Gielesen, W.L.M.
de Vreugd, J.
van der Laan, L.W.
van 't Hof, C.A.
Contributor
Cugny, B. (editor)
Sodnik, Z. (editor)
Karafolas, N. (editor)
Publication year
2021
Abstract
Sentinel-5 is an Earth atmospheric monitoring mission developed within the European Union’s Copernicus program. The mission objective is to monitor the composition of the Earth’s atmosphere on a daily basis. Airbus DS GmbH acts as the prime contractor under a European Space Agency contract. The instrument design, development, and the instrument verification was and is in many aspects a fruitful co-operation between Airbus and TNO. The first part of this paper illustrates the optical design of the five optical channels of the Sentinel 5 instrument. The innovative compact optical design sets the basis for the acquisition of the variety of trace gas spectra. The design includes a two free-form mirror wide field telescope, a pointing insensitive Dual Babinet Pseudo Depolariser type polarisation scrambler, three one-dimensional waveguide type homogenizers, five reflective and refractive anamorphotic spectrometers including different disperser types as an a-spherical reflective diffraction grating for the ultra-violet, a grism for mainly the visible, a transmissive grating for the near-infrared, and immersed reflective gratings for the short wave infrared spectral ranges. The second part of this paper focusses on the design, qualification and verification of the UV1 spectrometer subsystem. Its optical design is based on an Offner-type spectrometer which has been adapted to employ freeform optics and an aspheric off-axis grating. A monolithic housing structure has been developed for optimum stability, accessibility and easy integration of the optical components. The qualification and performance verification of the first Proto Flight Model of the UV1 spectrometer was successfully completed in July 2020.
Subject
Atmospheric monitoring
Earth observation
Homogenizer
Spectrometer
Telescope
To reference this document use:
http://resolver.tudelft.nl/uuid:c39d2006-fa02-45d4-ad88-2ea7759517d1
DOI
https://doi.org/10.1117/12.2599430
TNO identifier
968142
Publisher
SPIE
ISSN
0277-786X
Source
2020 International Conference on Space Optics, ICSO 2020, 30 March - 2 April 2021, Virtual
Document type
conference paper