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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 41, Iss. 33 — Nov. 20, 2002
  • pp: 6957–6967

Thermodynamic product retrieval methodology and validation for NAST-I

Daniel K. Zhou, William L. Smith, Jun Li, Hugh B. Howell, Greg W. Cantwell, Allen M. Larar, Robert O. Knuteson, David C. Tobin, Henry E. Revercomb, and Stephen A. Mango  »View Author Affiliations


Applied Optics, Vol. 41, Issue 33, pp. 6957-6967 (2002)
http://dx.doi.org/10.1364/AO.41.006957


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Abstract

The National Polar-Orbiting Operational Environmental Satellite System (NPOESS) Airborne Sounder Testbed (NAST) consists of two passive collocated cross-track scanning instruments, an infrared interferometer (NAST-I) and a microwave radiometer (NAST-M), that fly onboard high-altitude aircraft such as the NASA ER-2 at an altitude near 20 km. NAST-I provides relatively high spectral resolution (0.25-cm-1) measurements in the 645–2700-cm-1 spectral region with moderate spatial resolution (a linear resolution equal to 13% of the aircraft altitude at nadir) cross-track scanning. We report the methodology for retrieval of atmospheric temperature and composition profiles from NAST-I radiance spectra. The profiles were determined by use of a statistical eigenvector regression algorithm and improved, as needed, by use of a nonlinear physical retrieval algorithm. Several field campaigns conducted under varied meteorological conditions have provided the data needed to verify the accuracy of the spectral radiance, the retrieval algorithm, and the scanning capabilities of this instrumentation. Retrieval examples are presented to demonstrate the ability to reveal fine-scale horizontal features with relatively high vertical resolution.

© 2002 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(280.0280) Remote sensing and sensors : Remote sensing and sensors

History
Original Manuscript: January 22, 2002
Revised Manuscript: July 2, 2002
Published: November 20, 2002

Citation
Daniel K. Zhou, William L. Smith, Jun Li, Hugh B. Howell, Greg W. Cantwell, Allen M. Larar, Robert O. Knuteson, David C. Tobin, Henry E. Revercomb, and Stephen A. Mango, "Thermodynamic product retrieval methodology and validation for NAST-I," Appl. Opt. 41, 6957-6967 (2002)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-41-33-6957

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