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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 50, Iss. 17 — Jun. 10, 2011
  • pp: 2601–2616

Cloud detection performance of spaceborne visible-to-infrared multispectral imagers

Takashi Y. Nakajima, Takumi Tsuchiya, Haruma Ishida, Takashi N. Matsui, and Haruhisa Shimoda  »View Author Affiliations


Applied Optics, Vol. 50, Issue 17, pp. 2601-2616 (2011)
http://dx.doi.org/10.1364/AO.50.002601


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Abstract

We investigate the cloud detection efficiency of existing and future spaceborne visible-to-infrared imagers, focusing on several threshold tests for cloud detection over different types of ground surfaces, namely, the ocean, desert, vegetation, semibare land, and cryosphere. In this investigation, we used the CLoud and Aerosol Unbiased Decision Intellectual Algorithm (CLAUDIA), which was developed for unbiased cloud detection. It was revealed that imagers with fewer bands than the Moderate Resolution Imaging Spectroradiometer tend to have cloudy shifts. An imager without any infrared bands could yield cloudy shifts up to 17% over the ocean. To avoid false recognition of Sun glint as clouds, the 0.905 and 0.935 μm bands are needed in addition to the infrared bands. In reflectance ratio tests, the 0.87 and 1.6 μm bands can effectively distinguish clouds from desert. In the case of desert, thermal–infrared bands are ineffective when the desert surface temperature is low during winter. The 3.9 and 11 μm bands are critical for distinguishing between clear and cloudy pixels over snow-/ice-covered areas. The results and discussions of this research can guide CLAUDIA users in the optimization of thresholds. Here, we propose a virtual imager called the cloud detection imager, which has seven or eight bands for efficient cloud detection.

© 2011 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(010.1615) Atmospheric and oceanic optics : Clouds

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: September 14, 2010
Revised Manuscript: March 13, 2011
Manuscript Accepted: March 21, 2011
Published: June 3, 2011

Citation
Takashi Y. Nakajima, Takumi Tsuchiya, Haruma Ishida, Takashi N. Matsui, and Haruhisa Shimoda, "Cloud detection performance of spaceborne visible-to-infrared multispectral imagers," Appl. Opt. 50, 2601-2616 (2011)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-50-17-2601

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