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| Titel |
Synergistic angular and spectral estimation of aerosol properties using CHRIS/PROBA-1 and simulated Sentinel-3 data |
| VerfasserIn |
W. H. Davies, P. R. J. North |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 4 ; Nr. 8, no. 4 (2015-04-10), S.1719-1731 |
| Datensatznummer |
250116296
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| Publikation (Nr.) |
 copernicus.org/amt-8-1719-2015.pdf |
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| Zusammenfassung |
| We develop a method to derive aerosol properties over
land surfaces using combined spectral and angular information, such as available from ESA Sentinel-3 mission, to be launched in 2015.
A method of estimating aerosol optical depth (AOD) using only angular retrieval has previously been
demonstrated on data from the ENVISAT and PROBA-1 satellite
instruments, and is extended here to the synergistic spectral and
angular sampling of Sentinel-3. The method aims to
improve the estimation of AOD,
and to explore the estimation of fine mode fraction (FMF) and single scattering albedo (SSA) over
land surfaces by
inversion of a coupled surface/atmosphere radiative transfer model. The surface model
includes a general physical model of angular and spectral surface
reflectance. An iterative process is used to determine the optimum
value of the aerosol properties providing the best fit of the
corrected reflectance values to the physical model. The method is tested using hyperspectral, multi-angle
Compact High Resolution Imaging Spectrometer (CHRIS) images. The
values obtained from these CHRIS observations are validated using
ground-based sun photometer measurements. Results from 22 image sets
using the synergistic retrieval and improved aerosol models show an
RMSE of 0.06 in AOD, reduced to 0.03 over vegetated targets. |
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