A physical retrieval algorithm for IASI using PCRTM

Xu Liu; Daniel K. Zhou; Allen Larar; William L. Smith; Peter Schluessel

doi:10.1117/12.694175

22 December 2006 A physical retrieval algorithm for IASI using PCRTM

Xu Liu, Daniel K. Zhou, Allen Larar, William L. Smith, Peter Schluessel

Proceedings Volume 6405, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications; 64050L (2006) https://doi.org/10.1117/12.694175
Event: SPIE Asia-Pacific Remote Sensing, 2006, Goa, India

Abstract

A physical retrieval algorithm was developed for the Infrared Atmospheric Sounder Interferometer (IASI), which was launched on board of the METOP A satellite. The retrieval algorithm uses a Principal Component-based Radiative transfer model (PCRTM) and performs retrieval in Empirical Orthogonal Function (EOF) domain. The PCRTM fast radiative transfer model provides the principal component (PC) scores of an IASI radiance spectrum and the derivatives of the PC scores with respect to atmospheric parameters. Since the principal components are orthogonal to each other, relatively small number of PC scores are needed to capture the information content of the radiance spectrum. By performing radiative transfer modeling and retrieval in EOF domain directly; the algorithm deals with much smaller dimension as compared to original radiance domain. The retrieval is very efficient and fast.

Citation Download Citation

Xu Liu, Daniel K. Zhou, Allen Larar, William L. Smith, and Peter Schluessel "A physical retrieval algorithm for IASI using PCRTM", Proc. SPIE 6405, Multispectral, Hyperspectral, and Ultraspectral Remote Sensing Technology, Techniques, and Applications, 64050L (22 December 2006); https://doi.org/10.1117/12.694175

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