A numerical model for the ALTIUS instrument performance assessment

D. Göhner; N. Saillen; D. Buhler; L. Aballea; L. Montrone; D. Navarro; M. Francois

doi:10.1117/12.2680610

19 October 2023 A numerical model for the ALTIUS instrument performance assessment

D. Göhner, N. Saillen, D. Buhler, L. Aballea, L. Montrone, D. Navarro, M. Francois

Proceedings Volume 12729, Sensors, Systems, and Next-Generation Satellites XXVII; 127291A (2023) https://doi.org/10.1117/12.2680610
Event: SPIE Remote Sensing, 2023, Amsterdam, Netherlands

Abstract

The ALTIUS (Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere) Earth observation mission is an atmospheric limb sounder with three independent hyperspectral imagers. A spectrally tunable Fabry-P´erot Interferometer cascade in the ultraviolet (250 nm to 355 nm), and two Acousto-optic tunable filters covering the visible (440 nm to 675 nm) and near-infrared (600 nm to 1020 nm) respectively perform measurements to obtain atmospheric ozone data. This paper addresses the ALTIUS Instrument numerical model developed in MATLAB by the European Space Agency to confirm the compliance status regarding the Instrument Level zero requirements, perform sensitivity analyses, assist in design trade-off exercises, and monitor the industrial instrument development progress. The model employs a modular approach, whereby the optical assembly is separated into individual functions representing the optical units within the instrument channels, including the modeling of less conventional spectral tunable filters adopted within the ALTIUS Mission. The model is designed to be versatile to follow the hardware driven input along with the project life cycle. Finally, this paper provides examples of how this model has contributed to instrument design decision confirmation, presents a selection of current Level zero performance results of the ALTIUS instrument channels (signal-to-noise ratio, spectral response function, full width half maximum, etc.).

Conference Presentation

Citation Download Citation

D. Göhner, N. Saillen, D. Buhler, L. Aballea, L. Montrone, D. Navarro, and M. Francois "A numerical model for the ALTIUS instrument performance assessment", Proc. SPIE 12729, Sensors, Systems, and Next-Generation Satellites XXVII, 127291A (19 October 2023); https://doi.org/10.1117/12.2680610

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