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New approach for severe marine weather study using satellite passive microwave sensing ArchiMer
Zabolotskikh, Elizaveta V.; Mitnik, Leonid M.; Chapron, Bertrand.
A methodology, based on model simulations and neural networks inversion, is proposed to jointly retrieve sea surface wind speed, sea surface temperature, atmospheric water vapor content, cloud liquid water content, and total atmospheric absorption at 10.65GHz using Advanced Microwave Scanning Radiometer 2 measurements. In particular, estimation of the total atmospheric absorption at 10.65GHz, which can be done with high accuracy due to the not so strong influence of liquid water and especially water vapor, helps to refine a new filter to considerably reduce masking ocean areas for severe weather systems, characterized by high wind speeds and moderate atmospheric absorption, appropriate for studying winter extratropical cyclone and polar low systems. A...
Tipo: Text Palavras-chave: Satellite passive microwave; Weather filter; High winds; AMSR-2; Atmospheric absorption.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00166/27752/25943.pdf
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Radio-Frequency Interference Identification Over Oceans for C- and X-Band AMSR2 Channels ArchiMer
Zabolotskikh, Elizaveta; Mitnik, Leonid M.; Chapron, Bertrand.
A new method for radio-frequency interference (RFI) contamination identification over open oceans for the two C-subbands and X-band of Advanced Microwave Scanning Radiometer 2 (AMSR2) channel measurements is suggested. The method is based both on the AMSR2 brightness temperature (T-B) modeling and on the analysis of AMSR2 measurements over oceans. The joint analysis of T-B spectral differences allowed to identify the relations between them and the limits of their variability, which are ensured by the changes in the environmental conditions. It was found that the constraints, based on the ratio of spectral differences, are more regionally and seasonally independent than the spectral differences themselves. Although not all possible RFI combinations are...
Tipo: Text Palavras-chave: Atmosphere; Geophysical measurement techniques; Oceans; Passive microwave remote sensing; Radio-frequency interference (RFI).
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00273/38411/41989.pdf
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