Articles | Volume 16, issue 1
https://doi.org/10.5194/amt-16-195-2023
https://doi.org/10.5194/amt-16-195-2023
Research article
 | 
17 Jan 2023
Research article |  | 17 Jan 2023

Performance and polarization response of slit homogenizers for the GeoCarb mission

Sean Crowell, Tobias Haist, Michael Tscherpel, Jérôme Caron, Eric Burgh, and Berrien Moore III

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Cited articles

Bauer, M., Meister, C., Keim, C., and Irizar, J.: Sentinel-5/UVNS instrument: the principle ability of a slit homogenizer to reduce scene contrast for earth observation spectrometer, in: Sensors, Systems, and Next-Generation Satellites XXI, edited by: Meynart, R., Neeck, S. P., Shimoda, H., Kimura, T., and Bézy, J.-L., September, 48 p., SPIE, https://doi.org/10.1117/12.2278619, 2017. a, b, c, d, e, f, g
Butz, A., Galli, A., Hasekamp, O., Landgraf, J., Tol, P., and Aben, I.: TROPOMI aboard Sentinel-5 Precursor: Prospective performance of CH4 retrievals for aerosol and cirrus loaded atmospheres, Remote Sens. Environ., 120, 267–276, https://doi.org/10.1016/j.rse.2011.05.030, 2012. a
Caron, J., Kruizinga, B., and Vink, R.: Slit homogenizers for Earth observation spectrometers: overview on performance, present and future designs, in: International Conference on Space Optics – ICSO 2018, edited by: Karafolas, N., Sodnik, Z., and Cugny, B., Vol. 11180, 37 p., SPIE, https://doi.org/10.1117/12.2535957, 2019. a, b, c, d, e, f, g, h
Connor, B., Bösch, H., McDuffie, J., Taylor, T., Fu, D., Frankenberg, C., O'Dell, C., Payne, V. H., Gunson, M., Pollock, R., Hobbs, J., Oyafuso, F., and Jiang, Y.: Quantification of uncertainties in OCO-2 measurements of XCO2: simulations and linear error analysis, Atmos. Meas. Tech., 9, 5227–5238, https://doi.org/10.5194/amt-9-5227-2016, 2016. a
Crowell, S.: Slit Homogenizer Measurements, Measurements and analysis code for slit homogenizers designed for the GeoCarb mission, OSF Home [data set, code], https://doi.org/10.17605/OSF.IO/KZBYR, 2023. a
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Short summary
Variations in brightness in radiance measurements cause errors that can be mitigated with hardware that scrambles the pattern of the incoming light. GeoCarb took this route to minimize this source of errors, but lab testing determined that the solution chosen was too sensitive to the the polarization of the incoming light. Modeling found that this was a predictable result of using gold coatings in the design, which is typical of spaceflight optical instruments.