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Communication Dans Un Congrès Année : 2013

Impact of surface emissivity and atmospheric conditions on surface temperatures estimated from top of canopy brightness temperatures derived from Landsat 7 data

Résumé

The method to derive surface temperature from top of canopy brightness temperature developed by Olioso (1995b) [20] is tested over the Avignon-Crau-Camargue area (France) using Landsat-7 ETM+ images. The difference between surface temperature and brightness temperature depends on surface emissivity, incident atmospheric radiation and the temperature itself. Differences up to 2 K were obtained for a surface emissivity of 0.97. It can increase up to 7 K when surface emissivity was 0.91. The surface temperature derived from Landsat data were in agreement with the ground measurements when using local calibration of the surface emissivity derivation method and a modification of the calculation of atmospheric radiation as compared to [20]. The impact of error in emissivity derivation was higher than the impact of errors in deriving atmospheric radiation.
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Dates et versions

hal-01189889 , version 1 (01-09-2015)

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Albert Olioso, Maria Mira Sarrio, Dominique Courault, Olivier Marloie, Pierre Guillevic. Impact of surface emissivity and atmospheric conditions on surface temperatures estimated from top of canopy brightness temperatures derived from Landsat 7 data. IEEE International Geoscience and Remote Sensing Symposium IGARSS 2013, IEEE., Jul 2013, Melbourne, Australia. ⟨10.1109/IGARSS.2013.6723465⟩. ⟨hal-01189889⟩
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