One-Dimensional Variational Retrieval of the Wet Tropospheric Correction for Altimetry in Coastal Regions

Edited: 2011-02-18
TitleOne-Dimensional Variational Retrieval of the Wet Tropospheric Correction for Altimetry in Coastal Regions
Publication TypeJournal Article
Year of Publication2010
AuthorsDesportes, C., E. Obligis, and L. Eymard
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume48
Issue3
Pagination1001
Date Published03/2010
Keywordsjason, microwave_radiometer, sea_level
AbstractThe 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.
DOI10.1109/TGRS.2009.2031494