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Proceedings Paper

Accelerating the RTTOV-7 radiative transfer model on graphics processing units
Author(s): Jarno Mielikainen; Bormin Huang; Allen H. Huang; Roger Saunders
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Paper Abstract

We develop a Graphics Processing Unit (GPU)-based high-performance RTTOV-7 forward model. The RTTOV forward model performs the fast computation of the radiances, brightness temperatures, overcast radiances, surface to space transmittances, surface emissivities and pressure level to space transmittances for a given profile vector. A special optimized high performance CUDA kernel was used for multi-profile processing. The difference between single-profile and multi-profile kernels is that in a multi-profile kernel each thread is responsible for computing the results for a single channel in several profiles. Multi-profile processing gave over two fold increase in processing speed compared to singleprofile processing. Using a GPU processing we reached promising speedups of 170x and 334x for single-profile and multi-profile processing, respectively. The significant 334x speedup means that the proposed GPU-based highperformance forward model is able to compute one day's amount of 1,296,000 Infrared Atmospheric Sounding Interferometer (IASI) spectra nearly within 12 minutes, whereas the original CPU-based version will impractically take nearly 3 days.

Paper Details

Date Published: 24 August 2010
PDF: 8 pages
Proc. SPIE 7810, Satellite Data Compression, Communications, and Processing VI, 781012 (24 August 2010); doi: 10.1117/12.863272
Show Author Affiliations
Jarno Mielikainen, Univ. of Wisconsin-Madison (United States)
Bormin Huang, Univ. of Wisconsin-Madison (United States)
Allen H. Huang, Univ. of Wisconsin-Madison (United States)
Roger Saunders, Met Office (United Kingdom)

Published in SPIE Proceedings Vol. 7810:
Satellite Data Compression, Communications, and Processing VI
Bormin Huang; Antonio J. Plaza; Joan Serra-Sagristà; Chulhee Lee; Yunsong Li; Shen-En Qian, Editor(s)

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