Special Section on High-Performance Computing in Applied Remote Sensing: Part 3

Graphics processing unit implementation of the maximum likelihood solution to the inverse problem for retrieval of geophysical parameters from high-resolution sounder data

[+] Author Affiliations
Shih-Chieh Wei

Tamkang University, Department of Information Management, Tamsui 25137, Taiwan

Bormin Huang

University of Wisconsin-Madison, Cooperative Institute for Meteorological Satellite Studies / Space Science and Engineering Center, Madison, Wisconsin 53706

Hung-Lung Allen Huang

University of Wisconsin-Madison, Cooperative Institute for Meteorological Satellite Studies / Space Science and Engineering Center, Madison, Wisconsin 53706

J. Appl. Remote Sens. 8(1), 084799 (Aug 13, 2014). doi:10.1117/1.JRS.8.084799
History: Received October 24, 2013; Revised November 20, 2013; Accepted November 25, 2013
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Abstract.  The radiative transfer equation (RTE) describes the sounder observed radiance as a result of contribution from various surface properties, atmospheric temperature, and absorbing gas profiles. Retrieval of these geophysical parameters from the sounder data requires an inverse solution to the RTE problem. In the presence of noise in observation data, the maximum likelihood method is often used to find the most probable solution from an ensemble described by a probability density function. In recent years, general purpose graphics processing units with hundreds of computing cores have become more affordable for scientific computation. This work will explore the use of GPU in speedup of the maximum likelihood solution to the ill-posed retrieval problem. For the infrared atmospheric sounding interferometer high-resolution sounder having 8641 channels, the use of GPU on maximum likelihood estimation shows a promising speedup of 1986× compared to a single-threaded native CPU version.

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© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Shih-Chieh Wei ; Bormin Huang and Hung-Lung Allen Huang
"Graphics processing unit implementation of the maximum likelihood solution to the inverse problem for retrieval of geophysical parameters from high-resolution sounder data", J. Appl. Remote Sens. 8(1), 084799 (Aug 13, 2014). ; http://dx.doi.org/10.1117/1.JRS.8.084799


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