摘要
依据GB-SAR传感器运行导轨与成像投影面的空间关系,分别推导了导轨中心线俯仰角和横轴侧倾角所引起的成像投影误差的计算公式。计算结果表明,导轨安装定位时产生的俯仰角通常可以忽略不计,而成像投影误差对导轨横轴的侧倾角更为敏感。在GB-SAR连续变形监测应用中,导轨的横向姿态需做严格控制,确保其水平度。
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.
出处
《测绘通报》
CSCD
北大核心
2017年第8期25-30,共6页
Bulletin of Surveying and Mapping
基金
住房和城乡建设部科技计划项目(2016-K4-089)
精密工程与工业测量国家测绘地理信息局重点实验室开放基金(PF2015-4
PF2015-1)
苏州科技大学人才引进科研资助项目(331511202)
关键词
地基合成孔径雷达
干涉测量
导轨姿态倾角
坐标变换
ground-based SAR
interferometry
rail posture inclination
coordinate transformation
