There is a minimum detective height when we measure the height of a crack.
当用超声波法测定裂纹的高度时 ,总是存在一个最小可测高度。
Several questions are analyzed mainly including mainlobe clutter width and minimum detectable velocity,range foldover and pulse repetition frequency,mainbeam footprint size and elevation angle,and Doppler frequency of ground clutter for SBR.
在分析雷达卫星-地球几何关系的基础上,给出天基雷达在搜索、跟踪和SAR模式下用功率孔径表示的雷达方程,进一步分析了主瓣杂波多普勒带宽与最小可检测速度的关系、距离模糊与脉冲重复频率的关系、波束主瓣地面面积与下视角的关系以及地球转动对地面回波多普勒频率的影响等方面的问题,得出的结论可以作为进一步研究天基雷达的基础。
In this paper,the minimum detectable velocity(MDV) of moving target indication(MTI) radar is researched.
研究了动目标显示(MTI)雷达的最小可检测速度(MDV)。
The shortcoming of conventional three channel SAR/GMTI methods is that the performance of minimum detectable velocity,ambiguous speed and blind-speed simultaneously can\'t be improved to meet the requirements of the system.
经典的三通道SAR/GMTI方法存在的缺点是不能同时提高最大不模糊可检测速度、最小可检测速度和盲速指标的性能以满足系统设计的要求。