Clutter is connatural condition of signal measuring and processing, which affect the radar's detectability and tracking ability of low-altitude target seriously.
杂波是雷达信号检测和处理的固有环境，严重影响了雷达低空目标探测与跟踪的性能。
We study the performance of turbocharged diesel engine working in different altitude regions by a computerized atmospheric simulation and comprehensive measuring system.
采用微机化大气模拟测控系统对增压柴油机在不同海拔地区的性能进行了大量的专题试验研究。
By measuring the refraction of this radio beam, we will be able to plot the temperature and density profile of Pluto's atmosphere from high altitude down to the surface.
借由测量无线电波的折射，我们可以描绘出冥王星大气层(从高空一直到表面)的温度与密度分布轮廓。
The operation principles of adjustment programs and circuits of the fuel regulation system for a ramjet engine at high altitude are introduced in detail. The measuring methods are also described.
详细介绍了高空工作的某型冲压发动机燃油调节系统的调节方案和调节线路的工作原理，叙述了该调节系统有关参数的测量方法。
The analyzing and simulating results prove that using the measuring method in this dissertation can get the action altitude in reentry telemetry.
计算机模拟和分析结果证明，利用本文所提出的方法可以应用于低高度的动作高度计算。
The analyzing and simulating results prove that using the measuring method in this dissertation can get the action altitude in reentry telemetry.
计算机模拟和分析结果证明，利用本文所提出的方法可以应用于低高度的动作高度计算。
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