基于角度变化率的机载多普勒直接测距方法

基于角度变化率与多普勒频差之间的关系,提出了一种机载单基线多普勒测距方法,该方法将前置角的正弦变化率引入多普勒频移方程,借助于微分变形所产生的角速度参量就能获得被测目标的距离。模拟分析验证了所导出公式的正确性,同时还分析证明了基于角度变化率的直接测距方法和基于多普勒频移变化率的直接测距方法等效,并基于频率分辨率,给出了...

Airborne Doppler Direct Ranging Method Based on Angle Change Rate

An airborne Doppler direct ranging method with single baseline is presented.Based on the relationship between the angle change rate and the Doppler frequency difference,the distance of measured target can be derived by making use of angular velocity that is obtained by differential deformation after introducing sine angle change rate into Doppler shift equation.The analog calculation verifies that derived formula is correct.Moreover,it is proofed that the direct ranging method based on angle change rate is equivalent to the one based on Doppler change rate.At the same time,the threshold quantity of lead angle is put up based on frequency resolution.As a comparison,the direct ranging method based on angle change rate has following characteristics：It is only requiring a dual channel measurement and independent of time measurement,and it is not necessary to suppose that the detecting platform must be in uniform motion.