边缘技术-激光测距测量大气风场的理论和应用
边缘技术-激光测距测量大气风场的理论和应用(中文+英文共5200字)
边缘技术是一种新型的测量微小频移量的方法。差分技术对激光频率和滤波器频率的飘移和抖动反映都不是很灵敏。这种测量技术对激光的宽度和形状反映不够灵敏，因为激光的宽度比边缘滤波器的半宽还要窄。在介绍激光测距测量大气风场的应用中我们介绍了它的测量理论，这种边缘技术可以利用气溶胶或者是分子后向散射信号来测量风场。下面用来两个例子来进一步说明。
1.引言
边缘技术在测量微小频移量中是一个新型有效的方法。这种方法应用广泛，包括：通过测量多普勒频移来判断物体沿激光束方向移动的速度。尤其是边缘技术可以用在激光测距系统中来获得大气风场的可分辨范围。
英文原文
Edge technique: theory and application to the laser measurement of atmospheric wind
The edge technique is a new and powerful method for measuring small frequency shifts. With the edge technique a laser is located on the steep slope of a high-resolution spectral filter, which produces large changes in transmission for small frequency shifts. A differential technique renders the frequency shift measurement insensitive to both laser and filter frequency jitter and drift. The measurement is shown to be insensitive to the laser width and shape for widths that are less than the half-width of the edge
.The theory of the measurement is given with application to the laser measurement of wind. The edge technique can be used to measure wind with a laser by using either the aerosol or molecular backscattered signal. Examples of both measurements are presented. Simulations for a ground-based laser at 1.06 plum using reasonable instrumental parameters are used to show accuracy for the vector