Radar system comprising a primary radar device and a secondary radar
device
    91.
    发明授权
    Radar system comprising a primary radar device and a secondary radar device 失效
    雷达系统包括主雷达装置和次雷达装置

    公开(公告)号:US3956747A

    公开(公告)日:1976-05-11

    申请号:US517221

    申请日:1974-10-23

    摘要: A radar arrangement utilizes a rotating or pivotal antenna lobe and a primary radar device operating with a doppler evaluation system and a secondary radar device equipped with a rotating or pivotal antenna lobe wherein a certain time period (processing time) expires between the scanning of a recognized target by the lobe of the primary radar antenna and the recognition of this target during the target evaluation in the receiver of the primary radar device. A storage device is provided which captures the azimuth angle position of a target recognized by the primary radar receiver and interrogation signals of the secondary radar transmitter are triggered with the help of a control means associated with the storage device for a certain interrogation range only when the antenna lobe of the secondary radar device repeatedly approaches the target. The interrogation range is selected sufficiently large that a number of answer signals is triggered which suffices for the desired reply probability.

    摘要翻译: 雷达装置利用旋转的或枢转的天线波瓣和用多普勒评估系统操作的初级雷达装置,以及配备有旋转或枢转天线波瓣的二次雷达装置,其中在识别的扫描之间的某个时间段(处理时间)期满 在主要雷达装置的接收机中的目标评估期间,由主雷达天线的波瓣对目标和目标进行识别。 提供了一种存储装置,其捕获由主雷达接收机识别的目标的方位角位置,并且仅在与第一雷达发射器的询问信号相关联的控制装置的帮助下才触发某个询问范围, 二次雷达装置的天线波瓣反复接近目标。 询问范围被选择得足够大,以致触发了多个应答信号,其满足期望的应答概率。

    Automatic prf selection to optimize range and doppler visibility in radar tracking
    92.
    发明授权
    Automatic prf selection to optimize range and doppler visibility in radar tracking 失效
    自动PRF选择优化雷达跟踪中的范围和多普勒可见性

    公开(公告)号:US3858208A

    公开(公告)日:1974-12-31

    申请号:US32976373

    申请日:1973-02-05

    摘要: A radar system is disclosed which uses an established track predicted range, Rp, and radial velocity, Rp, of a target to select a frequency, F, and PRF for optimum range and doppler visibility in tracking. The procedure is to tentatively select a frequency not subject to interference; determine the highest possible band of PRF''s allowable between adjacent velocity blind regions computed from the equation

    摘要翻译: 公开了一种雷达系统,其使用目标的已建立的轨道预测范围Rp和径向速度R p来选择频率F和PRF以获得跟踪中的最佳范围和多普勒可见度。 程序暂时选择不受干扰的频率; 确定从等式(PRF)= 2RpF / cn +/- DELTA(PRF)计算的相邻速度盲区之间允许的PRF的最高可能频带,其中DELTA(PRF)是其中心的速度盲区的已知半宽,c 是光速,n = 1,2,3。 。 。 确定目标在Rn和Rn + delta之间的范围盲区之外的允许频带内的最高PRF,其中delta是盲区的宽度,并且从第R个盲区的Rn由Rn = cn / 2(PRF)确定 )其中n = 1,2,3。 。 。 。 初步检查确定目标的预测范围是否在原点的已知范围盲区delta'。 如果在允许的频带中没有发现具有范围可见性的PRF,则会发现PRF的另一个较低的允许频带(如果有的话),并检查范围可见性,直到找到有用的PRF或已经检查了所有可能性。 在后一种情况下,选择另一个频率,并重复该过程,直到找到有用的PRF或已经检查了所有频率。