Digital Terrain Models from Radar Interferometry
نویسندگان
چکیده
Interferometric synthetic aperture radar (InSAR) is a rapidly evolving technology for DTM generation. It exploits the coherent nature of SAR imaging to measure stereo parallaxes in the mm and cm regime from phase differences. InSAR systems are active microwave sensors; they operate independent of cloud cover and sun illumination. This paper reviews the basic principle and the properties of spaceborne SAR interferometers. It is shown how height accuracy and resolution depend on system parameters and temporal decorrelation behaviour of the imaged terrain. A brief overview of current and future SAR and InSAR systems is given.
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