Abstract
ABSTRACTThis paper presents a new method to correct rail errors of ground-based synthetic aperture radar (GB-SAR) in the discontinue mode. Generally, light positioning is performed to mark the GB-SAR position in the discontinuous observation mode. Usually we assume there is no difference between the marked position and the real installation position. But in fact, it is hard to keep the GB-SAR positions of two campaigns the same, so repositioning errors cannot be neglected. In order to solve this problem, we propose an algorithm to correct the rail error after analysing the GB-SAR rail error geometry. Results of the simulation experiment and the real experiment of a landslide in Lvliang, Shanxi, China, show the proposed method achieves a millimetre-level precision, enabling the discontinuous GB-SAR observation (D-GBSAR) mode to be used in engineering projects.
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