To establish a more accurate picture of wind speed and direction at prospective sites, some companies are turning to laser and sonar-based measurement instruments to complement MCP.
为了在预期站点建立更准确的风速和风向图，一些公司转向激光或者声纳系统基础的测量仪器完成MCP。
2
Atmosphere turbulence is the major factor that affects the accuracy of the propagating direction of a laser beam, and causes serious errors in laser straightness measurement at long distance.
在激光基准长距离、高精度直线度测量中，空气扰动是影响其测量精度的一个主要因素。
3
A method of measurement of bubble diameter in the prism is given. The measured diameter direction is incident laser beam direction.