Comparison of CO2 Doppler lidar and GPS rawinsonde wind velocity measurements
Comparison of CO2 Doppler lidar and GPS rawinsonde wind velocity measurements
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DOI：
10.1117/12.438174
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发表时间：
2001-09
影响因子：
9.3
通讯作者：
J. Roadcap;P. Mcnicholl;E. Teets;Mitchell H. Laird
中科院分区：
文献类型：
--
作者：
J. Roadcap;P. Mcnicholl;E. Teets;Mitchell H. Laird
2000年5月，在马萨诸塞州汉斯科姆空军基地对二氧化碳多普勒激光雷达和GPS雷达探空仪测量的水平风速进行了比较。使用激光雷达和GPS探空仪进行了为期7天的并排测量，比较了风速作为海拔高达6公里的函数。CO2多普勒激光雷达采用速度方位角显示（VAD）方法测定水平风速。水平风也同时使用差分GPS跟踪雷达探空仪确定，该雷达探空仪每秒提供一次GPS位置坐标。计算并比较了激光雷达VAD风速均方根差（RMS）和激光雷达与GPS探测的均方根差（RMS）作为海拔高度、时间和稳定状态的函数。平均而言，与稳定条件相比，在不稳定条件下观察到激光雷达VAD RMS和激光雷达与GPS RMS的显著增加。对激光雷达VAD RMS的分析显示，在单个剖面上，最小的典型值平均接近0.5 m/s。
A comparison of CO2 Doppler lidar and GPS rawinsonde measurements of horizontal wind velocity was conducted during May 2000 at Hanscom AFB, Massachusetts. Seven days of side-by-side measurements using both lidar and GPS sondes were achieved comparing wind velocity as a function of altitude up to 6 km. The horizontal wind velocity was determined by the CO2 Doppler lidar using the Velocity Azimuth Display (VAD) method. Horizontal winds were also determined simultaneously using a differential GPS-tracked rawinsonde which provides GPS position coordinates once per second. Both lidar VAD wind speed Root Mean Squared Difference (RMS) and lidar vs. GPS sonde RMS were calculated and compared as a function of altitude, time, and stability regime. On average, significant increases in both the lidar VAD RMS and lidar vs. GPS RMS were observed during unstable conditions compared to stable conditions. Analyses of lidar VAD RMS show the smallest typical values average near 0.5 m/s over a single profile.