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Proceedings Paper

Analysis of pseudo-noise for infrared sounder instruments in geostationary orbit
Author(s): Mathieu Quatrevalet; Donny Aminou; Carsten Standfuss
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Paper Abstract

Increasing user and service needs for Numerical Weather Prediction impose an Infrared Sounding (IRS) mission on Meteosat Third Generation platforms. A major objective of the IRS mission is to provide a vertical sounding capacity in the vicinity of clouds, above clouds and below semi-transparent clouds. Thus, cloud contamination has to be severely controlled at instrument or at system level. Pseudo-noise is defined as the measurement error generated by scene heterogeneity. Spectrally correlated, it affects the information content of the vertical sounding and thus the quality of high-level products. An IRS pseudo-noise estimation model has been developed in view of supporting the consolidation of observational requirements during the detailed instrument design and system specification process. Geophysical inputs to the model are a spatial atmosphere distribution and the corresponding high-resolution radiance spectra. Major instrument inputs are a PSF model and an ISRF model. The paper presents a mathematical specification of pseudo-noise components and their quantification upon current design assumptions for the two considered instrument concepts: dispersive and Fourier transform spectrometer. The pseudo-noise budget is established for meaningful geophysical scenarios, and the associated observational requirements are derived and discussed, providing useful orders of magnitude for further iteration of the trade-off between instrument specifications and system requirements.

Paper Details

Date Published: 12 October 2006
PDF: 12 pages
Proc. SPIE 6362, Remote Sensing of Clouds and the Atmosphere XI, 636227 (12 October 2006); doi: 10.1117/12.689731
Show Author Affiliations
Mathieu Quatrevalet, European Space Research and Technology Ctr. (Netherlands)
Donny Aminou, European Space Research and Technology Ctr. (Netherlands)
Carsten Standfuss, Noveltis (France)

Published in SPIE Proceedings Vol. 6362:
Remote Sensing of Clouds and the Atmosphere XI
James R. Slusser; Klaus Schäfer; Adolfo Comerón, Editor(s)

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