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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 24 — Aug. 20, 1998
  • pp: 5541–5549

Satellite-sensor calibration verification with the cloud-shadow method

Phillip N. Reinersman, Kendall L. Carder, and Feng-I R. Chen  »View Author Affiliations


Applied Optics, Vol. 37, Issue 24, pp. 5541-5549 (1998)
http://dx.doi.org/10.1364/AO.37.005541


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Abstract

An atmospheric-correction method appropriate for high-spatial-resolution sensors that uses cloud-shaded pixels together with pixels in a neighboring region of similar optical properties is described. This cloud-shadow method uses the difference between the total radiance values observed at the sensor for these two regions, thus removing the nearly identical atmospheric radiance contributions to the two signals (e.g., path radiance and Fresnel-reflected skylight). What remains is largely due to solar photons backscattered from beneath the sea to dominate the residual signal. Normalization by the direct solar irradiance reaching the sea surface and correction for some second-order effects provides the remote-sensing reflectance of the ocean at the location of the neighbor region, providing a known ground target spectrum for use in testing the calibration of the sensor.A similar approach may be useful for land targets if horizontal homogeneity of scene reflectance exists about the shadow. Monte Carlo calculations have been used to correct for adjacency effects and to estimate the differences in the skylight reaching the shadowed and neighbor pixels.

© 1998 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.1320) Atmospheric and oceanic optics : Atmospheric transmittance
(010.4450) Atmospheric and oceanic optics : Oceanic optics
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(280.1310) Remote sensing and sensors : Atmospheric scattering

History
Original Manuscript: July 21, 1997
Revised Manuscript: May 4, 1998
Published: August 20, 1998

Citation
Phillip N. Reinersman, Kendall L. Carder, and Feng-I R. Chen, "Satellite-sensor calibration verification with the cloud-shadow method," Appl. Opt. 37, 5541-5549 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-24-5541


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