英格兰贝德福郡皇家航空研究所已开始对装在执勤喷气战斗机机头上的相干的激光多普勒测速计进行飞行试验。建立在单频 CO_2波导激光器基础上的“激光真实空气系统”是利用飞机前方风送粒子后向散射时多普勒频移信号的外差探测,目的在于向驾驶员予警强的局部下向气流、阵风和切向风,特别是当飞行接近地面准备着陆时,使他们得以避免或者补偿这些因素的影响。大莫尔文的皇家信号和雷达研究所研制了这种激光测速计。该研究所的沃恩12月12日在伦敦电气工程师学会举行的测量传感器会议上介绍了飞行的试验结果。在此装置中,弗兰蒂公司的一个3瓦激光器的输出通过直径15厘米的锗望远镜聚焦在飞机前方300米以内的探测区。后向散射多普勒信号与本机 The Royal Institute of Flight, Bedfordshire, England, has started flight tests of a coherent laser Doppler speedometer mounted on the nose of a duty jet fighter. The “laser real air system” based on the single-frequency CO_2 waveguide laser is based on the heterodyne detection of the Doppler shift signal in the backscattering of the particles by the wind in front of the aircraft, aiming at giving the driver a strong part Downwinds, gusts and tangential winds, especially when the flight is ready to land close to the ground, enable them to avoid or compensate for the effects of these factors. The Royal Malmven Royal Institute of Signal and Radar developed this laser gun. Vaughan at the Institute presented the flight test results at a meeting of the Measurement Sensors Conference at the Institute of Electrical Engineers in London on December 12. In this installation, a 3-watt laser from Flatiron’s output was focused on a detection zone within 300 meters in front of the aircraft by a 15-centimeter-diameter germanium telescope. Backscatter Doppler signals with native