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The Journal of Supercomputing

, Volume 10, Issue 4, pp 315–329 | Cite as

Fast algorithms for estimating aerosol optical depth and correcting Thematic Mapper imagery

  • Hassan Fallah-Adl
  • Joseph Jájá
  • Shunlin Liang
Article

Abstract

Remotely sensed images collected by satellites are usually contaminated by the effects of atmospheric particles through the absorption and scattering of radiation from the earth's surface. The objective of atmospheric correction is to retrieve the surface reflectance from remotely sensed imagery by removing the atmospheric effects, which is usually performed in two steps. First, the optical characteristics of the atmosphere are estimated and then the remotely sensed imagery is corrected by inversion procedures that derive the surface reflectance. In this paper we introduce an efficient algorithm to estimate the optical characteristics of the Thematic Mapper imagery and to remove the atmospheric effects from it. Our algorithm introduces a set of techniques to significantly improve the quality of the retrieved images. We pay particular attention to the computational efficiency of the algorithm, thereby allowing us to correct large TM images quickly. We also provide a parallel implementation of our algorithm and show its portability and scalability on three parallel machines.

Keywords

High-performance computing scalable parallel processing remote sensing atmospheric correction aerosol optical depth 

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Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Hassan Fallah-Adl
    • 1
  • Joseph Jájá
    • 2
  • Shunlin Liang
    • 3
  1. 1.Intel CorporationSanta ClaraUSA
  2. 2.Institute for Advanced Computer Studies (UMIACS) and Department of Electrical Engineering, University of MarylandCollege ParkUSA
  3. 3.Department of GeographyUniversity of MarylandCollege ParkUSA

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