Year: 2014
Type: conference-abstract
Abstract: [ABSTRACT]Synthetic Aperture Radar (SAR) is recognized as a powerful surveillance and land observation purpose system these days. An SAR sensor is usually loaded on moving platform such as aerial vehicle or satellite then acquires the images of remote area in interest. Also this system uses microwave for its own illumination source, therefore it can be operated regardless of the weather condition. When SAR system performs its mission in space, there are ionosphere and air in the path of satellite and the target as a propagation medium. Conventional SAR system uses linearly polarized (LP) microwave and as LP wave traverses through the ionosphere, Faraday rotation (FR) effect occurs. FR makes the reference plane of microwave tilt slightly, consequently causes polarization mismatch when receiving the backscattered signal. This polarization mismatch eventually degrades the image quality such as image burling, degradation of contrast, and etc. To cover up the problems of conventional LP-SAR system, this paper proposes that circularly polarized (CP) SAR system which can get rid of polarization mismatch theoretically and compare the pros and cons between LP and CP SAR images with simulated image data.
Language: English
Subfield: Aerospace Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7207933237