异源多普勒频移应用于空中风探测  

Application of speed measurement by Doppler shift on sounding of wind of upper atmosphere

作　　者：高太长[1] 陈新甫[1] 翟东力[1] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101

出　　处：《解放军理工大学学报（自然科学版）》2007年第4期396-399,共4页Journal of PLA University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60471013)

摘　　要：针对无线电经纬仪体制下的空中风探测精度较低的问题,提出基于异源多普勒频移测速技术的空中风探测方法,讨论了该方法应用的意义。分析了利用异源多普勒频移进行空中风探测的数学原理,根据多普勒频移原理和探测精度对频率源的要求,在探空仪上使用恒温晶振(OCXO)作为高稳定度的频率源,将其输出频率分频后作为副载波调制在发射机上,地面接收机检测副载波信号的频移并进行径速的计算。对这种方法进行了初步的实验验证,结果表明该方法的应用可以改善被动探测方式下的空中风探测精度。In order to solve the problem of low sounding accuracy of the wind of the upper atmosphere by wireless theodolite systems, the method of sounding of the wind of upper atmosphere was presented based on the technology of speed measurement by Doppler shift from different sources, and the significance of the application of this method discussed. The mathematical elements of sounding of the wind of the upper atmosphere was analyzed by this method, according to the principle of Doppler shift and demand of fre- quency source for sounding accuracy, with the oven-controlled crystal oscillator （OCXO） on the sounding apparatus as a high stability frequency source, and its divided output as subcarrier to modulate the transmitter, the ground receiver measure radial speed from the frequency shift of the subcarrier. An elementary experimental validation was completed. The result indicates that the application of this method can improve the accuracy of sounding of the wind of the upper atmosphere by the passive sounding mode.

关 键 词：空中风 异源 频率 多普勒频移 径速 

分 类 号：P412.22[天文地球—大气科学及气象学]