光学学报, 2013, 33 (s2): s228001, 网络出版: 2013-12-24
机载多普勒激光雷达数据校正算法
Data Correction Algorithm of Airborne Doppler Lidar
遥感 激光雷达 数据校正算法 速度校正 地面信号 机载 remote sensing lidar data correction velocity correction ground return airborne
摘要
相干多普勒激光雷达通过探测大气气溶胶后向散射信号的多普勒频移来反演风场。机载多普勒激光雷达的应用发展拓展了风场探测的领域、提高了探测时效性。而机载激光雷达的风场反演相对于地基系统来说要复杂很多,这归因于飞机平台的移动特征带来的多普勒影响。主要论述了机载多普勒激光雷达在风场反演过程中需要实现的主要数据校正算法,包括姿态校正、高度校正、速度校正、地面信号校正算法等,并实现了激光地面作用点海拔高度和地面信号速度的反演和对比验证,对比结果具有较好的一致性。这些算法的有效解决对于提高激光雷达测量精度具有重要意义。
Abstract
The wind field can be derived using the atmosphere aerosol signal with Doppler shift by the coherent Doppler lidar. With the development of airborne Doppler lidar, the data coverage is extended and the time resolution is increased. However, the wind derivation of airborne lidar is complex corresponding to Ground-based lidar, due to the Doppler shift caused by mobile platform. The most of data correction method is introduced, including the data correction of attitude, altitude, velocity, ground return and so on. The elevation of ground intersection point and the ground speed is respectively derived and compared, good consistence is showed. The developing of those algorithms will be necessary for the accuracy of wind detection.
李志刚, 刘智深, 宋小全, 刘秉义, 朱林伟, 朱金山. 机载多普勒激光雷达数据校正算法[J]. 光学学报, 2013, 33(s2): s228001. Li Zhigang, Liu Zhishen, Song Xiaoquan, Liu Bingyi, Zhu Linwei, Zhu Jinshan. Data Correction Algorithm of Airborne Doppler Lidar[J]. Acta Optica Sinica, 2013, 33(s2): s228001.