Study Of The Triangulation Method From Airborne Synthetic Aperture Radar Images

For the special mapping area with cloudy or foggy weather, airborne SAR images usually have the technology advantages because of its imaging characteristics such as high-resolution, full-time and full weather, which is very difficult for the traditional optical remote sensing images. And, the research results on the principle and technique methods of airborne SAR images triangulation are the key facts, for the mapping requirements, to reduce the numbers of Ground Control Points (GCPs), fulfill a vast area SAR images mosaic mission and obtain a dense GCP net.Against to high-resolution airborne SAR images, this paper based on the analysis of imaging principles to research the mathematical model fitting with airborne SAR images triangulation, and the corresponding accurate parameters error model. Whereafter, under the condition of sparse or without GCPs, it testified and realized the method to make a dense GCPs net in a mapping area by the test results, and, formed a series of methods of airborne SAR images triangulation for the application of surveying and mapping.It mostly includes the contents as follows:1. It researched on the airborne SAR imaging characteristics relative to the mapping application, and the principles of space positioning for SAR images.2. Based on the analysis of SAR imaging and its principles of mapping, it established an accurate parameters error model of stereo positioning from airborne SAR images, and researched the sensitivities to the ground 3D positioning for all of the imaging parameters, flight trajectory parameters and other error parameters, and analyzed the corresponding application of parameters error model.3. Under the condition of sparse GCPs, it researched and testified the mathematical model for airborne SAR images, and the relative methods of block configuration, block adjustment method, LDL algorithm for computing...