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使用1064nm连贯多普勒激光雷达和10mJ脉冲激光,高精度的垂直风形状测定到12公里,使用10mJ脉冲激光

Haocheng Yang, Chong Wang, Xianghui Xue

|April 12, 2025

概括

一个新的连贯多普勒风雷达 (CDWL) 系统提供长距离的风探测,可在水平上探测到25公里,垂直探测到12公里. 这种先进的激光雷达技术为气象应用提供了连续的风场检索.

科学领域:

大气科学大气科学
光学遥感器远程传感器
激光技术激光技术激光技术

背景情况:

现有的连贯多普勒风雷达 (CDWL) 系统在垂直检测范围内面临限制.
准确的风场数据对于气象研究和风力剪切监测等应用至关重要.

研究的目的:

开发和展示一个高性能CDWL系统,用于扩展远程垂直和水平风场检测.
为了克服当前Lidar系统的垂直检测局限性.

主要方法:

使用自主开发的单频脉冲Nd:YAG激光器 (1064nm,10mJ脉冲能量).
采用180毫米直径的望远镜来增强信号收集.
实施了多普勒波束振荡 (DBS) 扫描技术,用于连续检索风场.

主要成果:

实现了25公里的水平视线 (LOS) 检测范围.
在1分钟的集成时间内启用垂直风速分析,可达到12公里.
与ERA5再分析数据显示出很高的一致性 (r2=0.8709对于U,r2=0.9623对于V的风能组件).

结论:

开发的CDWL系统提供了强大的远程风力检测能力.
这种Lidar技术的进步,结合高能激光和优化放大,为大气动力学研究提供了宝贵的工具.
该系统可在10公里高度内连续检索风场,解决了以前的垂直检测挑战.

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