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雷达搜索

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The drone flies autonomously enroute to its patrol area its radar seeker head constantly search for hostile radars.

无人飞行器飞行中自主到它的巡逻区域,它的雷达搜索头不停地寻找敌方雷达。

In one mission flight, the Global hawk can proceed extension area radar search and EO/IR photo capturing for 74,000 square kilometers, the minium CEP of the target positioning would be 20 meters.

一次任务飞行中,"全球鹰"既可进行大范围雷达搜索,又可提供7.4万平方千米范围内的光电/红外图像,目标定位的圆误差概率最小可达20米。

To this end the original 'Blue Fox' radar is replaced by Ferranti 'Blue Vixen' coherent pulse-Doppler track-while-scan radar to improve acquisition and look-down capabilities, and other improvements are a MIL 1553B digital databus (making it possible to carry Sea Eagle anti-ship and ALARM anti-radar missiles) and the installation of the Marconi Sky Guardian 200 RWR, the JTIDS for secure voice and data links, two additional underwing hardpoints, wing tip stations for two AIM-9 Sidewinder short-range AAMs, wing improvements, a revised cockpit with HOTAS controls, larger drop tanks, provision for 25 mm Aden 25 cannon in place of the elderly 30 mm weapons, and possibly a Plessey missile-approach warning system.

为实现这一目的,原有的"蓝狐"雷达被新型的"蓝雌狐"连续波脉冲多普勒雷达替换,该雷达具有搜索的同时锁定目标的能力,可下视下射。其他改进包括加装军用1553B数据链,这使得MK2可以使用"海鹰"反舰导弹和ALARM反雷达导弹。另外加装了马可尼"天空哨兵200"通信系统,JTIDS保密语音及数据链路。增加了两个翼下外挂点,翼尖挂架可携带两枚AIM-9"响尾蛇"近距空空导弹。细节的改进还包括:机翼设计有所改进;改进的座舱设计;更大的副油箱;采用阿登25mm机关炮代替了以往的30mm机炮;可能加装了导弹告警系统。

The multipath effect is an avoidless problem which the tracking radar and the searching radar among CIWS has to face. This paper analyses the form of the multipath effect on geometry, emphasizes the distance difference between the direct wave and the reflected wave, according to this inherent characteristic, the paper introduces the theory of HRR to the design of radars among CIWS, discusses the spike pulse technology and ultra wide hand technology which often be used, finally proposes the method of time-frequency code to obtain the high range resolution and avoid the multipath effect.

多路径效应是近程反导武器系统中的搜索雷达和跟踪雷达均无法避免的问题,文中分析了多路径效应形成的几何原理,并根据多路径效应中的直射波与反射波具有路程差的固有特性,将高距离分辨率雷达信号理论引入到近程反导武器系统的雷达中,讨论了实现高距离分辨率的窄脉冲和超宽带技术,最后提出了目前较易实现的时间-频率码合成高距离分辨率的办法。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

一种提高空间伪码扩谱测距精度的实用。。。摘要:传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收,通过多路试探搜索各距离单元的目标,电路复杂。提出的数字化方案,对回波信号直接数字化,利用高速dsp实现数字卷积,可替代多路模拟相关电路。但是直接卷积的运算量过大,dsp无法承受。本文对此进行了研究,分析了包括fft在内的五种快速算法,结合prc-cw雷达的具体情况,确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

multi-channel correlators are widely used in traditional pseudo-random code cw radar,which makes the ranging system more complicated.this paper proposes a method of digitalizing the return signal directly and then convoluting the signals on dsp,which can replace multi-channel correlation in analog circuit.but the computation of convolution is too huge for the dsp to fulfill.to solve this problem,this paper analyzes five fast algorithms including fft,and then chooses one according to the characters of prc-cw radars.the digital method and fast algorithm have been verified by simulated signal and real signal.

摘 要:传统的伪码调相连续波雷达采用多路模拟相关电路实现对回波信号的相关接收,通过多路试探搜索各距离单元的目标,电路复杂。提出的数字化方案,对回波信号直接数字化,利用高速dsp实现数字卷积,可替代多路模拟相关电路。但是直接卷积的运算量过大,dsp无法承受。本文对此进行了研究,分析了包括fft在内的五种快速算法,结合prc-cw雷达的具体情况,确定了一种适于dsp实现的快速卷积算法。仿真和实测数据证实了数字化方案及快速算法的正确性。

To this end the original 'Blue Fox' radar is replaced by Ferranti 'Blue Vixen' coherent pulse-Doppler track-while-scan radar to improve acquisition and look-down capabilities, and other improvements are a MIL 1553B digital databus (making it possible to carry Sea Eagle anti-ship and ALARM anti-radar missiles) and the installation of the Marconi Sky Guardian 200 RWR, the JTIDS for secure voice and data links, two additional underwing hardpoints, wing tip stations for two AIM-9 Sidewinder short-range AAMs, wing improvements, a revised cockpit with HOTAS controls, larger drop tanks, provision for 25 mm Aden 25 cannon in place of the elderly 30 mm weapons, and possibly a Plessey missile-approach warning system.

为实现这一目的,原有的&蓝狐&雷达被新型的&蓝雌狐&连续波脉冲多普勒雷达替换,该雷达具有搜索的同时锁定目标的能力,可下视下射。其他改进包括加装军用1553B数据链,这使得MK2可以使用&海鹰&反舰导弹和ALARM反雷达导弹。另外加装了马可尼&天空哨兵200&通信系统,JTIDS保密语音及数据链路。增加了两个翼下外挂点,翼尖挂架可携带两枚AIM-9&响尾蛇&近距空空导弹。细节的改进还包括:机翼设计有所改进;改进的座舱设计;更大的副油箱;采用阿登25mm机关炮代替了以往的30mm机炮;可能加装了导弹告警系统。

The complete combat suites comprise a surveillance radar, a fire control radar system together with a weapon interface for a 76/62mm gun and a target designation sight from further renowned contractors.

完整的作战组件包括了源于著名厂商的一部搜索雷达,一部包含了76/62毫米舰炮接口的火控雷达系统和一部目标指示器。

Radar : Undernose 360° search radar; directional ESM radomes above rear of engine bay fairing and at tailcone tip.

雷达 :Undernose 360度搜索雷达,引擎室后方无害环境管理的雷达罩定向以上整流罩和tailcone小费。

The dynamic precision adjusting shipboard radar based on differential GPS is proposed in this paper,algorithm of conversion GPS-80 coordinate into distance and bearing of target relative with shipboard radar is given.

提出了一种基于差分GPS技术的舰载雷达动态标校方法,给出了根据大地坐标计算目标真值的算法;设计了一种舰载搜索雷达与跟踪雷达之间同步测量和适用于海上活动平台多传感器之间动态标校的数据处理方法;海上实践表明,这种方法具有精度高、实时性强的特点。

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On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?