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A novel compact NO2 instrument for high-resolution air quality remote sensing (abstract only)

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Author: Siegl, M. · Valk, N.C.J. van der · Veefkind, P. · Caron, J.F. · Leemhuis, A.P. · Bezy, J.L.
Publisher: International Astronautical Federation IAF
Source:Proceedings of the 69th International Astronautical Congress, IAC 2018, 1-5 October 2018, Bremen, Germany
Identifier: 867088
Keywords: Space & Scientific Instrumentation · Industrial Innovation


The current paper introduces the novel `Compact NO2 Spectrometer', dedicated to facilitating future global NO2 remote sensing. It aims at a significantly smaller instrument size while looking to retain key performance parameters as established by TROPOMI. Its compact size will enable the instrument to be compatible with a multitude of different space platforms, therefore facilitating a future global coverage of daily NO2 measurements. The design study was commissioned by the European Space Agency (ESA). An integrated development approach was used between TNO and the Royal Netherlands Meteorological Institute (KNMI) to achieve a compact design that fulfils the requirements of the scientific community. The present paper first introduces the Compact NO2 instrument, outlines NO2 data use cases and the scientific requirements for state-of-the-art NO2 instruments. It then describes the design features of the `Compact NO2 Spectrometer', such as the compact optical design, the use of free-form optics, an `athermal' all aluminium approach, and novel approaches to data processing. The performance with respect to state-of-the-art space instruments (such as TROPOMI) is discussed. It is shown that a very fine spatial sampling (down to 0.5x0.5 km 2 ) can be reached while still following a very compact low-mass low-volume design approach.