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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 39, Iss. 20 — Jul. 10, 2000
  • pp: 3537–3550

Retrieval of geophysical parameters from Moderate Resolution Imaging Spectroradiometer thermal infrared data: evaluation of a two-step physical algorithm

Xia L. Ma, Zhengming Wan, Christopher C. Moeller, W. Paul Menzel, Liam E. Gumley, and Yulin Zhang  »View Author Affiliations


Applied Optics, Vol. 39, Issue 20, pp. 3537-3550 (2000)
http://dx.doi.org/10.1364/AO.39.003537


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Abstract

A two-step physical algorithm that simultaneously retrieves geophysical parameters from Moderate Resolution Imaging Spectroradiometer (MODIS) measurements was developed. The retrieved geophysical parameters include atmospheric temperature–humidity profile, surface skin temperature, and two surface emissivities within the shortwave (3–5-µm) and the longwave (8–14.5-µm) regions. The physical retrieval is accomplished in two steps: (i) The Tikhonov regularization method is employed to generate a regularization solution along with an optimum regularization parameter; (ii) the nonlinear Newtonian iteration algorithm is carried out with the regularization solution as a first-guess profile to obtain a final maximum probability solution for geophysical parameters. The algorithm was tested with both simulated and real MODIS Airborne Simulator (MAS) data. Sensitivity studies on simulated MAS data demonstrate that simultaneous retrievals of land and atmospheric parameters improve the accuracy of the retrieved geophysical parameters. Finally, analysis and accuracy of retrievals from real MAS data are discussed.

© 2000 Optical Society of America

OCIS Codes
(030.5620) Coherence and statistical optics : Radiative transfer
(280.0280) Remote sensing and sensors : Remote sensing and sensors

History
Original Manuscript: September 3, 1999
Revised Manuscript: April 28, 2000
Published: July 10, 2000

Citation
Xia L. Ma, Zhengming Wan, Christopher C. Moeller, W. Paul Menzel, Liam E. Gumley, and Yulin Zhang, "Retrieval of geophysical parameters from Moderate Resolution Imaging Spectroradiometer thermal infrared data: evaluation of a two-step physical algorithm," Appl. Opt. 39, 3537-3550 (2000)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-39-20-3537

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