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IEEE Antennas and Propagation Seminar Announcement
Sponsored by Fort Worth Chapter of IEEE Antennas and Propagation Society
Date: December 2, 2011, Friday
Time: 4:00 PM – 5:00 PM
Place: 122 Engineering Research Building, the University of Texas at Arlington
Speaker: Professor Saibun Tjuatja
The University of Texas at Arlington
Address: 500 UTA Blvd., Arlington, TX 76019
Directions: http://www.uta.edu/maps/map?id=ERB
Seminar contact: Dr. Mingyu Lu, EE Department (mingyulu@uta.edu)
Abstract
A key objective in microwave remote sensing of the environment is extraction of target information, i.e. its
geophysical and biophysical quantities. Recent advances in radar remote sensing technology, such as
full-polarimetric interferometric imaging radar, provide capabilities for measuring new observables that could
be utilized for retrieval of target’s information. Determining the correct relation between the sensor
measurements/observables to the target’s parameters is the most important problem in remote sensing. This
seminar focuses on physical fundamentals of a scattering model for stratified random medium, i.e. random
medium with structural and electrical profile along the radar look direction. A model application in remote
sensing of sea surface through precipitation is considered. A scattering model for sea surface with precipitation
that accounts for the effects of rain column and snow-rain transition layer will be presented. The rain column is
modeled as a random medium consisting of many sublayers. Each sublayer is assumed to be statistically
homogeneous, and its parameters are determined from the precipitation profile. Sea surface scattering is
modeled using the IEM model. Multiple scattering within and interactions between the rain layer,
cloud-precipitation transition layer and sea surface are fully accounted for in the radiative transfer formulation.
Brief descriptions of the scattering phase matrix formulation for the rain layer and a solution method for the
radiative transfer formulation using the scattering operator concepts will be provided. The presentation
concludes with model analyses, including quantitative analysis of rain effects on sea state sensing, and model
validation using published measurement results.
Biography
Saibun Tjuatja received the BSEE (Magna Cum Laude) degree from the University of Texas at Arlington
(UTA), MSEE degree from Purdue University, and Ph.D. in Electrical Engineering from UTA in 1987, 1988,
and 1992, respectively. He is currently an Associate Professor at UTA Department of Electrical Engineering
where he has been a faculty member since 1993. His current research interests include waves in random media,
scattering and emission modeling, remote sensing and subsurface sensing, radar imaging, and computational
electromagnetics. Dr. Tjuatja is a Senior Member of IEEE and a Fellow of the Electromagnetics Academy.