| Título: | On the detection of cirrus clouds from satellite measurements |
| Autores: | Di Girolamo, Larry |
| Fecha: | 1992 |
| Publicador: | McGill University - MCGILL |
| Fuente: |
 |
| Tipo: | Electronic Thesis or Dissertation |
| Tema: | Physics, Atmospheric Science. |
| Descripción: | A thorough literature review of cloud algorithm validation strategies is presented, with particular emphasis on the problems of detecting cirrus clouds. To further advance our cirrus detection capabilities, a new cloud detection technique is proposed for the Multi-angle Imaging Spectro-Radiometer (MISR), which is scheduled to be on the first platform of the Earth Observing System. Radiative Transfer simulations have been used to develop a Band-Differenced Angular Signature technique. This new technique takes the difference between two solar spectral reflectances as a function of view angle. The resulting angular signature is used to discriminate between high- and low-level clouds and surface reflectance anomalies. This technique, coupled with a Predetermined Clear Sky Threshold developed in this study for MISR, can detect cirrus clouds of visible optical thickness $>$0.5 without any a priori knowledge of atmospheric conditions. Other techniques that can be used with MISR (i.e. stereo) are also discussed. |
| Idioma: | en |
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