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EnglishThe authors propose an inversion scheme devoted to the retrieval of the atmospheric specific absorption coefficient based on data collected by a ground-based microwave radiometer. The technique processes elevation scans. The vertical plan is modelled by allocating M bins in the vertical directions. The forward modelling is defined by linearization of the radiative transfer equation around a reference model of the atmospheric parameter pattern. The goal is to estimate the atmospheric attenuation along the vertical path 3 km away from the radiometer location, where a transponder calibration device for the nadir looking RA-2 altimeter on board of the ENVISAT satellite is positioned. Estimation is performed through inversion of the brightness temperature values observed at different elevation angles, provided a proper parameterization of the model space. According to the agreement of the reference model to the actual conditions two cases are given: either the solution is acceptable or it is not reliable and a different inversion scheme is to be implemented. © 2012 IEEE.
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| Titolo: | A tomographic approach to the retrieval of the atmospheric specific attenuation coefficient from measured brightness temperature |
| Autori: | |
| Data di pubblicazione: | 2012 |
| Handle: | http://hdl.handle.net/11573/514642 |
| ISBN: | 9781467311588 9781467311595 9781467311601 |
| Appartiene alla tipologia: | 04b Atto di convegno in volume |
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