One-Dimensional Variational Retrieval of the Wet Tropospheric Correction for Altimetry in Coastal Regions
The altimeter range is corrected for tropospheric humidity by means of microwave radiometer measurements (Envisat/MWR, Jason-1/JMR, Jason-2/AMR). Over an open ocean, the altimeter/radiometer combination is satisfactory. However, in coastal areas, radiometer measurements are contaminated by the surro...
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| Veröffentlicht in: | IEEE transactions on geoscience and remote sensing 2010-03, Vol.48 (3), p.1001-1008 |
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| creator | Desportes, C. Obligis, E. Eymard, L. |
| description | The altimeter range is corrected for tropospheric humidity by means of microwave radiometer measurements (Envisat/MWR, Jason-1/JMR, Jason-2/AMR). Over an open ocean, the altimeter/radiometer combination is satisfactory. However, in coastal areas, radiometer measurements are contaminated by the surrounding land surfaces, and the humidity retrieval method is not appropriate anymore. In this paper, a variational assimilation technique is proposed to retrieve the wet tropospheric correction near coasts. The method is first developed on simulations using the data from a meteorological model. A performance assessment is performed, as well as a comparison with a standard algorithm. The method is then applied on actual measurements, thus evaluating its feasibility. |
| doi_str_mv | 10.1109/TGRS.2009.2031494 |
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Over an open ocean, the altimeter/radiometer combination is satisfactory. However, in coastal areas, radiometer measurements are contaminated by the surrounding land surfaces, and the humidity retrieval method is not appropriate anymore. In this paper, a variational assimilation technique is proposed to retrieve the wet tropospheric correction near coasts. The method is first developed on simulations using the data from a meteorological model. A performance assessment is performed, as well as a comparison with a standard algorithm. 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| subjects | Algorithms Altimeters Altimetry Applied geophysics Area measurement Coastal Coasts Earth Sciences Earth, ocean, space Exact sciences and technology Geophysics Humidity Humidity measurement Internal geophysics Land surface Marine Mathematical models Microwave measurements Microwave radiometry Oceans Physics Pollution measurement Radiometers Retrieval Sciences of the Universe Sea measurements Sea surface variational methods |
| title | One-Dimensional Variational Retrieval of the Wet Tropospheric Correction for Altimetry in Coastal Regions |
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