公开(公告)号：US3858208A

公开(公告)日：1974-12-31

申请号：US32976373

申请日：1973-02-05

申请人： HUGHES AIRCRAFT CO

发明人： PARKE D ,  GOLDBERG G ,  PRIESTER W ,  SCHEIDLER S

IPC分类号： G01S13/10 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  H01Q1/28 ,  H01Q25/00 ,  G01S9/10

CPC分类号： H01Q1/28 ,  G01S13/106 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  G01S13/872 ,  H01Q25/00

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。

公开(公告)号：US3858206A

公开(公告)日：1974-12-31

申请号：US32976573

申请日：1973-02-05

申请人： HUGHES AIRCRAFT CO

发明人： SCHEIDLER S ,  KING D ,  GEBHARDT R ,  GOLDBERG G ,  SIDLO R

IPC分类号： G01S13/10 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  H01Q1/28 ,  H01Q25/00 ,  G01S9/02

CPC分类号： H01Q1/28 ,  G01S13/106 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  G01S13/872 ,  H01Q25/00

摘要： An airborne radar system is disclosed utilizing multiple fixed antenna arrays mounted within the periphery of the aircraft to avoid aerodynamic modifications and optimumly placed to achieve 360* surveillance coverage. The arrays preferably include a fore mounted array, an aft mounted array, a port mounted array and a starboard mounted array for respectively firing beams in different azimuth sectors relative to the aircraft. Each array is comprised of dipole elements having phase shifters coupled thereto for steering a beam within the corresponding sector. The primary radar antennas time share an exciter, transmitter, receiver and signal processor through switching devices. Time allocation between antennas and between operational modes such as ''''search'''' or ''''track'''' is based on various factors such as mission objectives, current target characteristics and radar purpose. Time allocation is preferably determined by an ''''on line'''' stored program digital computer which generates a radar control command to define the parameters for each beam to be fired. This procedure involves calculating the priority value of each track and search beam to be fired in accordance with predetermined criteria contained in the stored program. The priority value of each track beam to be fired involves determining the update rate for that target which is calculated based on the characteristics of the target. Priority values are then determined based on a comparison between the elapsed time since the last update and the calculated update rate.

摘要翻译： 公开了一种机载雷达系统，其利用安装在飞行器周边内的多个固定天线阵列，以避免空气动力学修改，并且最佳地放置以实现360度监视覆盖。 阵列优选地包括前安装阵列，后安装阵列，端口安装阵列和用于分别在相对于飞行器的不同方位角扇区中发射梁的右舷安装阵列。 每个阵列由具有耦合到其上的相移器的偶极元件组成，用于控制相应扇区内的光束。 主雷达天线通过交换设备共享激励器，发射器，接收器和信号处理器。 天线之间和操作模式（如“搜索”或“轨道”）之间的时间分配基于各种因素，如任务目标，当前目标特征和雷达目的。 时间分配最好由一个“在线”存储的程序数字计算机确定，该程序数字计算机产生一个雷达控制命令，以定义每个射击射束的参数。 该过程涉及根据存储的程序中包含的预定标准来计算要被触发的每个轨道和搜索波束的优先级值。 要触发的每个轨道光束的优先级值包括确定基于目标的特征计算出的该目标的更新速率。 然后基于自上次更新以来的经过时间与计算的更新率之间的比较来确定优先级值。

公开(公告)号：US3831174A

公开(公告)日：1974-08-20

申请号：US32976273

申请日：1973-02-05

申请人： HUGHES AIRCRAFT CO

发明人： PARKE D ,  PRIESTER W ,  KING D ,  GOLDBERG G ,  GEBHARDT R

IPC分类号： G01S13/22 ,  G01S13/528 ,  G01S13/66 ,  G01S13/68 ,  G01S9/06

CPC分类号： G01S13/528 ,  G01S13/68

摘要： An airborne MTI radar system is disclosed for searching and tracking airborne targets over large bodies of water. In the search mode, returns from staggered PRF''s are used to resolve range ambiguity of targets, and first and second multipath returns are used to more positively identify an airborne target for automatic acquisition. The number of target returns counted (1, 2 or 3) at each PRF combined with the numbers at the other two PRF''s yields a plot combination count which serves to indicate the ''''quality'''' of a target in selecting new targets for tracking, but first each target is correlated with targets already being tracked. Uncorrelated targets are then checked as to quality by reordering the combination of target return counts in descending order and checking the resulting combination number, Qp, against a predetermined minimum acceptable plot quality, QM, for the range of the target and the sea state. If this check is passed by a particular target, it is entered into a table for automatic acquisition, provided the track store is not full to capacity; otherwise, the target is set up for display only for possible manual acquisition of track. Once acquired, the target is tracked automatically.

摘要翻译： 公开了一种机载MTI雷达系统，用于搜索和跟踪大型水体上的空中目标。 在搜索模式中，交错PRF的返回用于解决目标的范围模糊度，第一和第二多路径返回用于更积极地识别用于自动采集的机载目标。 每个PRF计算的目标收益（1,2或3）的数量与其他两个PRF的数字相结合，产生一个绘图组合计数，用于指示目标在选择新的跟踪目标时的“质量”，但首先 每个目标与已被跟踪的目标相关。 然后通过按照降序对目标返回计数的组合进行重新排序来检查不相关的目标，并根据目标和海况的范围的预定最小可接受的绘图质量QM来检查所得到的组合数目Qp。 如果该检查由特定目标通过，则将其输入到表中进行自动采集，条件是跟踪存储不满足容量; 否则，目标设置为只显示可能的手动采集轨道。 一旦获得，目标将被自动跟踪。

公开(公告)号：US3833904A

公开(公告)日：1974-09-03

申请号：US32976473

申请日：1973-02-05

申请人： HUGHES AIRCRAFT CO

发明人： GEBHARDT R ,  SIDLO R ,  GOLDBERG G ,  SCHEIDLER S ,  KING D ,  PARKE D ,  PRIESTER W ,  MUCHLINSKI D

IPC分类号： G01S13/10 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  H01Q1/28 ,  H01Q25/00 ,  G01S9/02

CPC分类号： H01Q1/28 ,  G01S13/106 ,  G01S13/12 ,  G01S13/524 ,  G01S13/528 ,  G01S13/66 ,  G01S13/70 ,  G01S13/87 ,  G01S13/872 ,  H01Q25/00

摘要： An airborne radar system is disclosed utilizing multiple fixed antenna arrays mounted within the periphery of the aircraft to avoid aerodynamic modifications and optimumly placed to achieve 360* surveillance coverage. The arrays preferably include a fore mounted array, an aft mounted array, a port mounted array and a starboard mounted array for respectively firing beams in different azimuth sectors relative to the aircraft. Each array is comprised of dipole elements having phase shifters coupled thereto for steering a beam within the corresponding sector. The radar system may include both primary and secondary radar subsystems with the dipole elements of primary and secondary radar antennas being physically interleaved in the aforementioned antenna arrays. The primary radar antennas time share an exciter, transmitter, receiver and signal processor through switching devices. The secondary radar antennas (typically an IFF/SIF system) similarly time share transmitting and receiving equipment. Time allocation between antennas of each subsystem and between operational modes such as ''''search'''' or ''''track'''' is based on various factors such as mission objectives, current target characteristics and radar purpose. Time allocation is preferably determined by an ''''on line'''' stored program digital computer which generates a radar control command to define the parameters for each beam to be fired. Typically, the control command specifies (1) array (2) beam elevation (3) beam azimuth (4) total number of fill and data pulses (5) number of fill pulses (6) frequency and (7) pulse repetition rate or frequency. For each radar subsystem, this control command is interpreted by a radar control unit which responds by controlling various system elements including the exciter, transmitter, switches, phase shifters and duplexers to cause the defined beam to be fired. Each control command also preferably specifies parameters utilized to interpret the return beam including (8) ground doppler offset (9) threshold (10) range start time and (11) range end time. This latter information is employed by the radar control unit to enable primarily the receiver and signal processor to generate a beam return report which is then communicated by the radar control unit to the digital computer. The beam return report typically includes a header portion specifying the (1) clutter level and (2) jam level for each different frequency. The report also includes a subreport for each return beam which specifies (3) range (4) amplitude (5) doppler filter number and (6) ratio of signal to clutter plus noise. The digital computer then utilizes the beam return report to determine subsequent control commands.