13 August 2014 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 +
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.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Shih-Chieh Wei, Shih-Chieh Wei, Bormin Huang, Bormin Huang, Hung-Lung A. Huang, Hung-Lung A. Huang, } "Graphics processing unit implementation of the maximum likelihood solution to the inverse problem for retrieval of geophysical parameters from high-resolution sounder data," Journal of Applied Remote Sensing 8(1), 084799 (13 August 2014). https://doi.org/10.1117/1.JRS.8.084799 . Submission:
JOURNAL ARTICLE
11 PAGES


SHARE
Back to Top