Congeduti F, Fiocco G, Adriani A, Guarrella C
Appl Opt. 1981 Jun 15;20(12):2048-54. doi: 10.1364/AO.20.002048.
A Doppler lidar based on a single frequency Ar(+) laser and a spherical Fabry-Perot interferometer is used to study the vertical velocity field in the planetary boundary layer. The wind velocity information is obtained by spectral analysis of the aerosol backscatter. The internal consistency of the lidar measurements points to a precision of 0.1 msec(-1) obtained for scans of ~25-sec duration and a good level of the received signal at a height of a few hundred meters and a vertical resolution of 75 m. A Doppler sodar was simultaneously operated to provide independent measurements of vertical velocity. The tests were carried out during nights characterized by horizontal winds <1 msec(-1). The axes of the two systems were displaced by 53 m, and the two beams overlapped only above ~300 m. The values of the correlation coefficient function between the two outputs for 100 data sets were ~0.5. A comparison of the velocity power spectra provided by the two systems shows good agreement at small values of the frequency; at large values, because of the limited spatial resolution of the sodar, its readings were consistently lower than those of the lidar.
一种基于单频氩离子激光器和球面法布里 - 珀罗干涉仪的多普勒激光雷达被用于研究行星边界层中的垂直速度场。通过对气溶胶后向散射的光谱分析获取风速信息。激光雷达测量的内部一致性表明，对于持续约25秒的扫描，精度可达0.1米每秒，在几百米高度处接收信号水平良好，垂直分辨率为75米。同时运行一台多普勒声雷达以提供垂直速度的独立测量。测试在水平风速小于1米每秒的夜间进行。两个系统的轴相距53米，两束光仅在约300米以上重叠。100个数据集的两个输出之间的相关系数函数值约为0.5。两个系统提供的速度功率谱比较表明，在低频值时一致性良好；在高频值时，由于声雷达的空间分辨率有限，其读数始终低于激光雷达的读数。
