Noise-related limits on the detectability of concentration variations of CH4 and CO with SCIAMACHY

Hans Schrijver; Sander Slijkhuis; Michiel G. M. Roemer; Albert P. H. Goede

doi:10.1117/12.198583

4 January 1995 Noise-related limits on the detectability of concentration variations of CH₄ and CO with SCIAMACHY

Hans Schrijver, Sander Slijkhuis, Michiel G. M. Roemer, Albert P. H. Goede

Proceedings Volume 2311, Atmospheric Sensing and Modelling; (1995) https://doi.org/10.1117/12.198583
Event: Satellite Remote Sensing, 1994, Rome, Italy

Abstract

We present results of a sensitivity analysis of CO and CH₄ observations in the infrared with the spectrometer SCIAMACHY. 2D simulations of trace gas dispersion are used to predict the concentration distributions of the two target gases. Changes in the concentrations are converted into changes in incoming flux to the instrument by simulating the photon scattering through the atmosphere by using several radiative transfer programs, and the HITRAN database. The incoming flux is transferred to measured detector pixel counts and noise employing the SCIAMACHY instrument simulation software as developed in SRON. The computed noise is translated to uncertainties in the determination of concentrations using the Cramer-Rao formalism. We show that for earth albedo values above 10% and realistic noise values the CH₄ concentrations can be determined with a precision better than 1%; for CO the error can be higher than 10% in unfavorable conditions. As a by-product, the sensitivities for measuring H₂O and N₂O are also given.

Citation Download Citation

Hans Schrijver, Sander Slijkhuis, Michiel G. M. Roemer, and Albert P. H. Goede "Noise-related limits on the detectability of concentration variations of CH₄ and CO with SCIAMACHY", Proc. SPIE 2311, Atmospheric Sensing and Modelling, (4 January 1995); https://doi.org/10.1117/12.198583

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