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Wind speed effect on L-band brightness temperature inferred from EuroSTARRS and WISE 2001 field experiments

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9 Author(s)
J. Etcheto ; Centre Nat. de la Recherce Scientifique, Univ. Pierre-et-Marie Curie, Paris, France ; E. P. Dinnat ; J. Boutin ; A. Camps
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The results from two field experiments in the Mediterranean Sea are used to study the wind speed dependence of brightness temperature at L-band. During the EuroSTARRS airborne experiment, an L-band radiometer made measurements across a large wind speed gradient, enabling us to study this dependence at high wind speed. We compare our results with a two-scale emissivity model using several representations of the sea state spectrum. While the results are encouraging, unfortunately the accuracy of the measurements does not permit us to distinguish between the so-called twice Durden and Vesecky spectrum and the Elfouhaily spectrum above 7 m·s-1. The effect of foam is certainly small. During the WISE 2001 field experiment carried on an oil rig, we studied this dependence at low wind speed, finding an abrupt decrease of the wind speed effect on the brightness temperature below 3 m·s-1.

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IEEE Transactions on Geoscience and Remote Sensing  (Volume:42 ,  Issue: 10 )