| Summary: | 碩士 === 朝陽科技大學 === 營建工程系碩士班 === 94 === Synthetic aperture radar interferometry （InSAR） is a new technique to explore the ground truth of the Earth. In general, synthetic aperture radar primarily is designed for mapping the scattering properties of the Earth’s surface. Many physical and geometric parameters of the imaged scene are recorded in SAR image pixels. The ground truth can be explored by extracting those parameters from SAR imagery. Interferometric SAR has been widely applied to generate the digital terrain model of an imaged area, and previous research results have demonstrated that the digital terrain generated by applying InSAR can reach high accuracy. The basic principle of InSAR is to measure the phase differences of at least two SAR images that are obtained at the same orbit position with two antennas or at different orbit positions with the same antenna. The microwave emitted from SAR satellites has better penetration capability than other electromagnetic waves with shorter wavelengths have, such that the surface of the Earth can be precisely determined without vegetation disturbances. The research applies those SAR imagery collected with ERS2 satellite. Based on the Doris, Deflt Object-oriented Radar Interferometric Software, developed by Deflt University, the digital terrain model of the northern part of Taiwan, especially the Taipei area, is generated.
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