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Proceedings Paper

Atmospheric property retrievals from infrared atmospheric sounding interferometer (IASI)
Author(s): Xu Liu; Daniel K. Zhou; Allen Larar; William L Smith; Peter Schluessel
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Paper Abstract

Retrieving atmospheric and surface properties from hyperspectral sensors is a challenging task due to the requirement of performing extensive radiative transfer calculations for thousands of channel radiances. We will present a retrieval algorithm, which uses a Principal Component-based Radiative Transfer Model (PCRTM) to perform radiative transfer calculation in Empirical Orthogonal Functions (EOF) domain. By compressing thousands of channel radiances into one hundred EOFs, the dimensionality of the problem is greatly reduced while the information content is preserved. The PCRTM provides the EOF coefficients and associated derivatives with respect to atmospheric and surface parameters needed by the inversion algorithm. The inversion algorithm is based on a non-linear Levenberg-Marquardt method with climatology covariance and a priori information as constraints. We will show results obtained from data collected during the Joint Airborne IASI Validation Experiment (JAIVEx). The campaign took place in late April and early May of 2007. Spectra observed by Infrared Atmospheric Sounder Interferometer (IASI) onboard of METOP-A satellite will be used to retrieve atmospheric (temperature, moisture, and trace gas profiles, cloud top, cloud particle size and cloud optical depth) and surface properties (surface skin temperature and surface emissivity). Collocated radiosondes and dropsondes will be used in retrieval product inter-comparisons and validation.

Paper Details

Date Published: 13 October 2008
PDF: 7 pages
Proc. SPIE 7107, Remote Sensing of Clouds and the Atmosphere XIII, 71070E (13 October 2008); doi: 10.1117/12.800361
Show Author Affiliations
Xu Liu, NASA Langley Research Ctr. (United States)
Daniel K. Zhou, NASA Langley Research Ctr. (United States)
Allen Larar, NASA Langley Research Ctr. (United States)
William L Smith, Hampton Univ. (United States)
Peter Schluessel, EUMETSAT (Germany)


Published in SPIE Proceedings Vol. 7107:
Remote Sensing of Clouds and the Atmosphere XIII
Richard H. Picard; Adolfo Comeron; Klaus Schäfer; Aldo Amodeo; Michiel van Weele, Editor(s)

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