A Study of Optimized Observation Configuration in Determining Sea Ice Thickness Using Multilayer Backscattering Model in Antarctica
Global warming has been a topic highly interested by the research community. Researchers have been relating global warming to the condition in Antarctica and the increase in global temperature may speed up the melting of ice in the southern continent. This vast volume of ice has significant effects on climate, ocean salinity, current as well as its biological ecosystem. It is our interest to monitor physical changes in Antarctica, especially the sea ice condition, for global warming study using remote sensing technique. Since Antarctica is a huge continent, monitoring the physical changes could be challenging. Therefore, remotely sensing the continent using satellite would be a perfect choice but the retrieval of physical parameters of sea ice from the satellite images needs a thorough understanding of interaction between microwave and sea ice. In this paper, a multilayer model based on radiative transfer theory is developed to represent sea ice terrain in Antarctica. Unlike some single layer models in the literature, the multilayer model can represent the snow and sea ice layers more accurately. In this model, the snow and sea ice layers are considered electrically dense and therefore the Dense Medium Phase and Amplitude Correction Theory (DMPACT) is incorporated to consider the close spacing effect among the scatterers. The air-snow interface, snow-sea ice interface and sea ice-ocean interface are modeled using the Integral Equation Method (IEM). In order to better understand the interaction between microwave and snow and sea ice media, it is important to choose good observation configurations, such as frequency, incident angle and polarization of the wave. In this study, the optimization of observation configuration will be carried out and how various scattering mechanisms and also the physical parameters of sea ice and snow media can affect the backscattering coefficient with different observation configuration will be presented. This serves as practical guideline for future ground truth measurement in Antarctica and satellite monitoring in Antarctica.
M.D.Albert H.T.Ewe H.T.Chuah
Faculty of Engineering,Multimedia University,Malaysia Faculty of Information Technology,Multimedia University,Malaysia
国际会议
Progress in Electromagnetics Research Symposium 2008(2008年电磁学研究新进展学术研讨会)(PIERS 2008)
杭州
英文
1-6
2008-03-24（万方平台首次上网日期，不代表论文的发表时间）