Sky-radiance measurements for ocean-color calibration-validation.
Appl Opt
; 42(6): 896-907, 2003 Feb 20.
Article
en En
| MEDLINE
| ID: mdl-12617204
The calibration of an ocean-color sensor or validation of water products is generally based on ground-based extinct measurements from which the aerosol products (optical thickness tau(a) and aerosol type) are deduced. Sky-radiance measurements complement the extinction measurements mainly in the aerosol-model characterization. Our basic goal is to promote calibration-validation activities based on the radiative properties of the aerosols rather than their chemical or physical properties. A simple method is proposed (and evaluated) to convert sky radiances measured in the principal plane into atmospheric phase functions P. Indeed tau(a) and P are the required inputs to a radiative-transfer code for predicting the top-of-the-atmosphere radiances. The overall error in this prediction is a few percent. This method can operate on a worldwide network on ground-based sun radiometers and then be used to achieve a statistical analysis for validating satellite products.
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Colección:
01-internacional
Base de datos:
MEDLINE
Tipo de estudio:
Prognostic_studies
Idioma:
En
Revista:
Appl Opt
Año:
2003
Tipo del documento:
Article
País de afiliación:
Francia
Pais de publicación:
Estados Unidos