摘要
阐述了LIDAR多脉冲探测模式原理及影响因素。通过飞行实验对比了单脉冲与多脉冲探测模式在大高差地形区域的探测效率及相关问题。大高差地形测绘中,单脉冲模式只能采用低激光频率,造成点密度稀疏,难以满足高精度制图需求;多脉冲模式虽然具有作业效率高等优势,可以获取点密度更高的数据,如何规避大气边缘区的影响是必须考虑的问题。在西北某测区通过合理设计,采用多脉冲模式完成了机载激光雷达数据采集,获得了较好效果。未来采用LIDAR多脉冲探测模式可以在我国西部大高差区域地形测绘工作中发挥重要作用。
The principle of atmospheric margin for multi-pulse survey model was expounded. A flight experiment in high elevation difference area was done by using LIDAR single-pulse and multi-pulse mode. The data acquisition can be completed successfully with low point density by using the single-pulse mode,while can＇t be completed with multi-pulse mode for the influence of atmospheric margin although It has a high point density. It is proved that multi-pulse mode has an advantage in point density but the influence of atmospheric margin must be avoided. Through elevation analysis and rational flightline design,a survey task in high elevation difference area was completed successfully. Northwest of China. is a vast area with high elevation difference,multi-pulse mode will play an important role in the terrain mapping in future.
出处
《科学技术与工程》
北大核心
2015年第8期4-9,共6页
Science Technology and Engineering
基金
遥感信息与图像分析技术国家级重点实验室基金项目(9140C72010112c72003)
国家863课题(2012AA121304)资助
关键词
多脉冲
大气边缘区
地形高差
multi-pulse atmospheric margin elevation difference
