In this study, a method to improve the reconstruction performance of antenna-pattern deconvolution based on the gradient iterative regularization scheme is proposed. The method exploits microwave measurements acquired by a multichannel radiometer to enhance their native spatial resolution. The proposed rationale consists of using the information carried on a high-frequency (finer spatial resolution) channel to ameliorate the spatial resolution of the lowest resolution radiometer channel. Experiments performed using both synthetic and real special sensor microwave/imager (SSM/I) radiometer data demonstrate that an enhanced spatial resolution 19.35-GHz channel can be obtained by ingesting in the algorithm information coming from 37.0-GHz channel. This multichannel spatial resolution method is also shown to outperform the conventional gradient-like regularization scheme in terms of both observation of smaller targets and reduction of ringings and fluctuations.

A multichannel data fusion method to enhance the spatial resolution of microwave radiometer measurements / Alparone, M.; Nunziata, F.; Estatico, C.; Migliaccio, M.. - In: IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING. - ISSN 0196-2892. - 59:3(2021), pp. 2213-2221. [10.1109/TGRS.2020.3005204]

A multichannel data fusion method to enhance the spatial resolution of microwave radiometer measurements

Nunziata F.;Migliaccio M.
2021

Abstract

In this study, a method to improve the reconstruction performance of antenna-pattern deconvolution based on the gradient iterative regularization scheme is proposed. The method exploits microwave measurements acquired by a multichannel radiometer to enhance their native spatial resolution. The proposed rationale consists of using the information carried on a high-frequency (finer spatial resolution) channel to ameliorate the spatial resolution of the lowest resolution radiometer channel. Experiments performed using both synthetic and real special sensor microwave/imager (SSM/I) radiometer data demonstrate that an enhanced spatial resolution 19.35-GHz channel can be obtained by ingesting in the algorithm information coming from 37.0-GHz channel. This multichannel spatial resolution method is also shown to outperform the conventional gradient-like regularization scheme in terms of both observation of smaller targets and reduction of ringings and fluctuations.
2021
inverse problem; microwave radiometer (MWR); multichannel data fusion; resolution enhancement
01 Pubblicazione su rivista::01a Articolo in rivista
A multichannel data fusion method to enhance the spatial resolution of microwave radiometer measurements / Alparone, M.; Nunziata, F.; Estatico, C.; Migliaccio, M.. - In: IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING. - ISSN 0196-2892. - 59:3(2021), pp. 2213-2221. [10.1109/TGRS.2020.3005204]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1718466
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