Block adjustment of POS-supported airborne SAR images

The regional network adjustment of airborne SAR imagery is the important matter of realizing topographic survey and mapping of airborne SAR imagery with few control points. This paper, firstly, analyzes geometric relationship of airborne POS intergration SAR sensor and error characteristic of GPS data of SAR strip imagers, to construct the model of airborne SAR imagery space triangulation survey with auxiliary by POS, based on R-D imagery construction function. Positioning tests are been carried out respectively with the different number and distribution of control point, using the images of the mountain areas in western China, collected by multi-band and multi-polarization airborne SAR mapping system, as data source, and there is a close relationship of distribution of control point, three-dimensional photography baseline length and so on. Under the condition of less control points, higher accuracy can be achieved of the airborne SAR imagery, which indicates that the model this paper presents is right and feasible. In addition, the model constructed and the high resolution airborne SAR images used in this paper can be applied in middle and big scale topographic survey and mapping.