结合兰州新一代天气雷达的使用情况,介绍了其物理量产品中垂直积分液态含水量(Verti-cally Integrated L iqu id W ater Content,)的理论计算模式,从雷达观测距离对VIL计算的影响、VIL理论模式中的反射率强度和探测高度对VIL计算的影响...结合兰州新一代天气雷达的使用情况,介绍了其物理量产品中垂直积分液态含水量(Verti-cally Integrated L iqu id W ater Content,)的理论计算模式,从雷达观测距离对VIL计算的影响、VIL理论模式中的反射率强度和探测高度对VIL计算的影响及VIL在强对流天气识别中受季节变化的影响3方面提出了思考,以期为今后应用VIL识别强对流天气提供参考。展开更多
外大气层杀伤拦截器（exoatompropheric kill vehicle,EKV）是地基拦截导弹（ground based interceptor,GBI）上的拦截设备,是地基中段防御系统中的重要组成部分,是以直接碰撞杀伤的方式对弹道导弹弹头进行中段拦截的飞行设备.对EKV上...外大气层杀伤拦截器（exoatompropheric kill vehicle,EKV）是地基拦截导弹（ground based interceptor,GBI）上的拦截设备,是地基中段防御系统中的重要组成部分,是以直接碰撞杀伤的方式对弹道导弹弹头进行中段拦截的飞行设备.对EKV上红外导引头的各项探测性能参数进行了分析,分别推导了空间冷背景下和大气背景下红外导引头对点目标的作用距离方程,并对相应方程中的各项参数和影响因素进行了分析,估算了在空间冷背景下和大气背景下EKV的探测距离数据.展开更多
This paper firstly analyzes the property of the low frequency electromagnetic wave, which can penetrate many types of non-metallic materials, and the ability of Ultra-Wide Band (UWB) impulse signal which has high rang...This paper firstly analyzes the property of the low frequency electromagnetic wave, which can penetrate many types of non-metallic materials, and the ability of Ultra-Wide Band (UWB) impulse signal which has high range resolution. Then the methods are discussed for conducting surveillance through walls, detecting and locating the moving persons behind the partitions. The schematic diagram of Through-Wall Detecting Radar (TWDR) and the models of moving target are shown and the principle of detecting the moving target is also provided with coherent superimposing technique on a range gate. Finally an algorithm for estimating the location of targets is given. The performance of TWDR is validated by the experiments of penetrating a wood block, a red brick wall and a reinforced concrete wall.展开更多
文摘结合兰州新一代天气雷达的使用情况,介绍了其物理量产品中垂直积分液态含水量(Verti-cally Integrated L iqu id W ater Content,)的理论计算模式,从雷达观测距离对VIL计算的影响、VIL理论模式中的反射率强度和探测高度对VIL计算的影响及VIL在强对流天气识别中受季节变化的影响3方面提出了思考,以期为今后应用VIL识别强对流天气提供参考。
文摘外大气层杀伤拦截器（exoatompropheric kill vehicle,EKV）是地基拦截导弹（ground based interceptor,GBI）上的拦截设备,是地基中段防御系统中的重要组成部分,是以直接碰撞杀伤的方式对弹道导弹弹头进行中段拦截的飞行设备.对EKV上红外导引头的各项探测性能参数进行了分析,分别推导了空间冷背景下和大气背景下红外导引头对点目标的作用距离方程,并对相应方程中的各项参数和影响因素进行了分析,估算了在空间冷背景下和大气背景下EKV的探测距离数据.
基金Supported by the National 863 Program (No.2001AA132020).
文摘This paper firstly analyzes the property of the low frequency electromagnetic wave, which can penetrate many types of non-metallic materials, and the ability of Ultra-Wide Band (UWB) impulse signal which has high range resolution. Then the methods are discussed for conducting surveillance through walls, detecting and locating the moving persons behind the partitions. The schematic diagram of Through-Wall Detecting Radar (TWDR) and the models of moving target are shown and the principle of detecting the moving target is also provided with coherent superimposing technique on a range gate. Finally an algorithm for estimating the location of targets is given. The performance of TWDR is validated by the experiments of penetrating a wood block, a red brick wall and a reinforced concrete wall.
