The sensitivity of a new algorithm for cloud detection over a sea surface has been assessed on the basis of extensive simulations of clear and cloudy radiance spectra, including water and ice and low- and high-altitude clouds. The new algorithm makes use of autocorrelation and cross correlation between an observed spectrum and either a synthetic or a laboratory spectrum and can be used to determine quantitatively the degree of homogeneity of two spectra in the 800–900-cm−1 region (11.11–12.5 μm). The scheme is intended for high-spectral-resolution observations and could form the basis for an operational stand-alone cloud-detection algorithm for next-generation sounding spectrometers. Application of the scheme to real observations is presented and discussed.
© 2002 Optical Society of America
[Optical Society of America ]
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(010.3920) Atmospheric and oceanic optics : Meteorology
(280.0280) Remote sensing and sensors : Remote sensing and sensors
Guido Masiello, Marco Matricardi, Rolando Rizzi, and Carmine Serio, "Homomorphism between Cloudy and Clear Spectral Radiance in the 800-900-cm-1 Atmospheric Window Region," Appl. Opt. 41, 965-973 (2002)