Articles | Volume 14, issue 8
Atmos. Meas. Tech., 14, 5459–5472, 2021
https://doi.org/10.5194/amt-14-5459-2021
Atmos. Meas. Tech., 14, 5459–5472, 2021
https://doi.org/10.5194/amt-14-5459-2021

Research article 10 Aug 2021

Research article | 10 Aug 2021

Slit homogenizer introduced performance gain analysis based on the Sentinel-5/UVNS spectrometer

Timon Hummel et al.

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Cited articles

Amann, S., Duong-Ederer, Q., Haist, T., Sierk, B., Guldimann, B., and Osten, W.: Characterization of fiber-based slit homogenizer devices in the NIR and SWIR, in: International Conference on Space Optics – ICSO 2018, 7–10 October 2014, La Caleta, Tenerife, Canary Islands, edited by: Sodnik, Z., Karafolas, N., and Cugny, B., vol. 11180, 2276–2286, International Society for Optics and Photonics, SPIE, https://doi.org/10.1117/12.2536147, 2019. a
Berlich, R. and Harnisch, B.: Radiometric assessment method for diffraction effects in hyperspectral imagers applied to the earth explorer 8 mission candidate flex, in: International Conference on Space Optics – ICSO 2014, 7–10 October 2014, La Caleta, Tenerife, Canary Islands, edited by: Sodnik, Z., Cugny, B., and Karafolas, N., vol. 10563, 1475–1483, International Society for Optics and Photonics, SPIE, https://doi.org/10.1117/12.2304079, 2017. a
Bovensmann, H., Burrows, J. P., Buchwitz, M., Frerick, J., Noël, S., Rozanov, V. V., Chance, K. V., and Goede, A. P. H.: SCIAMACHY: Mission Objectives and Measurement Modes, J. Atmos. Sci., 56, 127–150, https://doi.org/10.1175/1520-0469(1999)056<0127:SMOAMM>2.0.CO;2, 1999. a
Burrows, J., Hölzle, E., Goede, A., Visser, H., and Fricke, W.: SCIAMACHY–scanning imaging absorption spectrometer for atmospheric chartography, Acta Astronaut., 35, 445–451, https://doi.org/10.1016/0094-5765(94)00278-T, 1995. a
Burrows, J. P., Weber, M., Buchwitz, M., Rozanov, V., Ladstätter-Weißenmayer, A., Richter, A., DeBeek, R., Hoogen, R., Bramstedt, K., Eichmann, K.-U., Eisinger, M., and Perner, D.: The Global Ozone Monitoring Experiment (GOME): Mission Concept and First Scientific Results, J. Atmos. Sci., 56, 151–175, https://doi.org/10.1175/1520-0469(1999)056<0151:TGOMEG>2.0.CO;2, 1999. a
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Short summary
The impact of heterogeneous scene radiance affects the quality of trace gas retrieval products of Earth observation imaging spectrometers. This effect can be mitigated by introducing on-board hardware solutions called slit homogenizers, which scramble the light entering the instrument and thereby make it insensitive to Earth scene contrast. Here we present a comprehensive modeling of the slit homogenizer present in the Sentinel-5/UVNS instrument and quantify the spectral performance.