Wind Profiling with an Eye-Safe Coherent Doppler Lidar System: Comparison with Radiosondes and VHF Radar
Wind Profiling with an Eye-Safe Coherent Doppler Lidar System: Comparison with Radiosondes and VHF Radar
复制标题
使用人眼安全的相干多普勒激光雷达系统进行风廓线分析：与无线电探空仪和甚高频雷达的比较
DOI：
10.2151/jmsj.83.1041
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发表时间：
2005
影响因子：
3.1
通讯作者：
K. Asai
中科院分区：
文献类型：
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作者：
S. Ishii;K. Mizutani;T. Aoki;M. Sasano;Y. Murayama;T. Itabe;K. Asai
一种人眼安全的机载相干多普勒激光雷达系统已经在国家信息和通信技术研究所（NICT）开发出来。该系统也可用于地面，并在NICT Wakkanai射电天文台进行了地面实验，以评估系统的性能。获得的风廓线与Wakkanai当地气象台发射的无线电探空仪和NICT在Wakkanai机场附近安装的VHFR系统测量的风廓线进行了比较。虽然相干多普勒激光雷达系统测得的体积与探空和NICT VHF雷达系统测得的体积在空间和时间上存在差异，但相干多普勒激光雷达系统观测到的风廓线与其他仪器观测到的风廓线吻合良好。通过对VHF雷达系统进行全相关分析得到的风速略小于相干多普勒激光雷达系统的风速，这与以往VHF雷达系统的统计结果一致。地面观测结果表明，在实际大气条件下，激光脉冲积累过程中风速估计的标准差趋于恒定，可靠估计风速的信噪比下限随着激光脉冲积累的增加而降低。地面实验表明，相干多普勒激光雷达系统是一种可靠的风相关研究系统。
An eye-safe airborne coherent Doppler lidar system has been developed at the National Institute of Information and Communications Technology (NICT). This system can also be used at ground level and ground-based experiments were made to evaluate the system performance at the NICT Wakkanai radio observatory. The obtained wind profiles were compared with those measured by radiosondes launched at the Wakkanai local meteorological observatory, and by a VHFR system installed by NICT near the Wakkanai airport. Although the volume measured by the coherent Doppler lidar system differed spatially and temporally from those by the radiosonde and the NICT VHF radar system, the wind profiles observed by the coherent Doppler lidar system agreed well with those observed by other instruments. The wind velocities obtained through the full correlation analysis of the VHF radar system were a little smaller than those from the coherent Doppler lidar system, which is consistent with previous statistical results for the VHF radar system. The ground-based results showed that the standard deviations of wind velocity estimates in the laser pulse accumulation seemed to approach a constant value under the real atmospheric conditions, and that the lower limit of the signal-to-noise ratio for the reliable estimate of the wind velocity decreases with the laser pulse accumulation. The ground-based experiments showed that the coherent Doppler lidar system is a reliable system for wind-related research.
国家大气研究中心/喷气推进实验室（美国）
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