摘要
针对机载双天线InSAR系统在1:10000地形测图中的要求,研究了干涉基线的工程设计与技术验证方法。给出了基线长度为2.3m,稳定精度达到0.1mm的外挂平板短梁设计方案,按照工程实现要求,完成了误差分析、指标论证、方案设计、气动及结构特性计算、地面测试与试飞验证。实际测图精度检验结果表明:外挂平板短梁方案采用匀速等高飞行方法,可以实现优于0.1mm的基线稳定要求。处理生成的数字表面模型和数字正摄影像图产品的检查点统计误差表明:平面和高程中误差分别达到1.203m和0.526m,可以满足1:10000地形测图精度要求,在机载干涉SAR系统的工程研制和实用化方面具有重要应用价值。
The engineering design of the baseline and its verifying analysis for airborne dual-antenna InSAR were presented according to the requirements of 1 ∶ 10000 scale topographical maps.The equipment of ＂external flat short beam for the aircraft＂ was developed and applied to measuring the digital surface modes （DSM）.The topographical accuracy based on the experimental data indicates that the baseline can reach 2.3m when using external flat short beam while the error is less than 0.1 mm with the uniform speed and altitude,the accuracy of DSM＆DOM （digital orthophoto map） meets the demands of 1 ∶ 10000 terrain maps and the mean square error in plane is 1.203 meters and 0.526 meters in elevation.It demonstrates that the engineering design of the baseline is important and valuable for the extensive application of airborne dual-antenna InSAR.
出处
《高技术通讯》
CAS
CSCD
北大核心
2013年第8期773-780,共8页
Chinese High Technology Letters
基金
863计划(2007AA120301)资助项目
