激光器重复频率对多普勒激光雷达信噪比影响的模拟研究

大气与环境光学学报 ›› 2012, Vol. ›› Issue (3): 168-174.

激光器重复频率对多普勒激光雷达信噪比影响的模拟研究

张冰, 陈超, 刘秉义, 郭金家, 刘智深

收稿日期:2012-02-21 修回日期:2012-02-22 出版日期:2012-05-28 发布日期:2012-05-24
通讯作者: 张冰 (1983-)，男，山东潍坊人，研究生，主要从事大气激光雷达方面研究. E-mail:polestartony@163.com
作者简介:张冰 (1983-)，男，山东潍坊人，研究生，主要从事大气激光雷达方面研究.
基金资助:
国家自然科学基金(40905005、40906019)资助

Simulation of SNR of Doppler Lidar in Different Laser Repetition Rate

ZHANG Bing, CHEN Chao, LIU Bing-yi, GUO Jin-jia, LIU Zhi-shen

(中国海洋大学海洋遥感研究所, 山东青岛 266003)

Received:2012-02-21 Revised:2012-02-22 Published:2012-05-28 Online:2012-05-24

摘要/Abstract

摘要：

多普勒激光雷达在风场测量和数值天气预报等方面有重要意义，而信噪比则是衡量系统测量精度的重要参数。以2007年中国海洋大学研制的我国第一台车载多普勒测风激光雷达系统为参考，模拟了在相同平均功率下，使用4种重复频率不同的激光器的激光雷达系统测量海面风场中的信噪比，并与汕尾测量的海面风场数据进行了对比，模拟数据和实测数据能够较好吻合，模拟结果证明使用低重复频率激光器的激光雷达系统能够获得较高的信噪比。而根据多普勒激光雷达业务测量要求，要求比较高的激光重复频率，通过模拟研究，建议选择激光器激光重复频率500~1000Hz。

关键词: 多普勒激光雷达, 白天测量精度, 信噪比, 模拟对比

Abstract:

Doppler lidar plays an important role in wind measurements and numerical weather prediction, and signal to noise ratio (SNR) is an important parameter to measure the system's accuracy. Based on the first mobile Doppler lidar system in China which is developed by Ocean University of China in 2007, the SNR for sea surface wind measurements with four different repetition rates are simulated. Simulated and measured data are in good agreement. The results show that the lower laser frequency used in the lidar, the higher SNR obtained. According to the requirements for operational measurements, Doppler lidar requires relatively high laser repetition rate. It is recommended to select a laser with pulse repetition rate during 500~1000 Hz.

Key words: Doppler lidar, measurement accuracy during the day, signal to noise ratio, simulation comparison

中图分类号:

TN958

张冰陈超刘秉义郭金家刘智深. 激光器重复频率对多普勒激光雷达信噪比影响的模拟研究[J]. 大气与环境光学学报, 2012, (3): 168-174.

ZHANG Bing, CHEN Chao, LIU Bing-Yi, GUO Jin-Jia, LIU Zhi-Shen. Simulation of SNR of Doppler Lidar in Different Laser Repetition Rate[J]. Journal of Atmospheric and Environmental Optics, 2012, (3): 168-174.

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