Error Analysis of Image Coordinate Projection Transformation Caused by Rail Inclination of GB-SAR

doi:10.13474/j.cnki.11-2246.2017.0248

Abstract

Abstract: Both pitch angle of rail centerline and roll angle of rail horizontal axis could lead to projection error in GB-SAR imaging process. In this paper, calculation formula of imaging projection error has been deducted, considering the spatial relationship between the sensor running rail and the imaging projection plane of GB-SAR. Calculation and analysis results show that the pitch angle generated when positioning GB-SAR running rail is usually negligible, meanwhile, the imaging projection error is more sensitive to the roll angle of this running rail. In continuous deformation monitoring applications of GB-SAR techniques, the lateral posture of sensor running rail need to be strictly controlled, ensuring its levelness.

Key words: ground-based SAR, interferometry, rail posture inclination, coordinate transformation

CLC Number:

WANG Peng, XING Cheng, XU Yaming. Error Analysis of Image Coordinate Projection Transformation Caused by Rail Inclination of GB-SAR[J]. 测绘通报, 2017, 0(8): 25-30.

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