公开(公告)号：US5164731A

公开(公告)日：1992-11-17

申请号：US714135

申请日：1991-06-13

Applicant: Scott C. Borden ,  Bruce D. Mathews ,  Joseph Stevenson

Inventor： Scott C. Borden ,  Bruce D. Mathews ,  Joseph Stevenson

IPC: G01S13/95

CPC classification number: G01S13/953

Abstract: The present invention is a radar system that detects turbulence by breaking a range cell return down into spectral segments using an FFT processor. The standard deviation of the spectrum is determined and the system compares that standard deviation to a reference threshold of a non-turbulent return if the signal is above noise. If the threshold is exceeded, the range cell is marked for turbulence display. Once the turbulence display is completed it is overlayed on the weather display. To improve matching of the feature size to the variance calculation the invention performs both range and azimuth post detection integration subsequent to the FFT but before variance calculation.

Abstract translation: 本发明是一种雷达系统，其通过使用FFT处理器将范围单元分解成频谱段来检测湍流。 确定频谱的标准偏差，并且如果信号高于噪声，系统将该标准偏差与非湍流返回的参考阈值进行比较。 如果超过阈值，范围单元被标记为湍流显示。 一旦湍流显示完成，它将覆盖在天气显示屏上。 为了改进特征尺寸与方差计算的匹配，本发明在FFT之后但在方差计算之前执行范围和方位角后检测积分。

公开(公告)号：US5311183A

公开(公告)日：1994-05-10

申请号：US714133

申请日：1991-06-13

Applicant: Bruce D. Mathews ,  Paul D. Mountcastle ,  Walter W. Patterson

Inventor： Bruce D. Mathews ,  Paul D. Mountcastle ,  Walter W. Patterson

IPC: G01S13/95

CPC classification number: G01S13/953

Abstract: The present invention is an airborne radar system which scans the flight path of an aircraft with two radar scans, an upper elevation pointing above local level and a lower elevation scan pointing below the glide slope. The radar returns from the upper elevation scan are used to detect the core of the microburst. The core and a model of the windshear which uses the core are used to select angles and range cell candidates, in a lower elevation scan, for hazard detection processing. The candidates in the lower scan, which is pointing at the ground, are used to create a hazard map tested against a predetermined hazard threshold. A threshold violation results in a pilot alert. The hazard map includes a vertical factor determined through model coefficients in the radial outflow as a function of altitude. The invention applies the model to determine the total hazard factor along the glideslope using the vertical hazard of the model and altitude scaling of the horizontal hazard from the lower bar elevation to the glideslope of the aircraft. The present invention also includes a radar scan with two pulse repetition frequencies which allows the elimination of non-correlated returns. The system also includes post detection integration with a sliding azimuth window to enhance the signal to noise ratio. The system also combines velocities within a single range gate to produce a velocity representing the windspeed at that range.

Abstract translation: 本发明是一种机载雷达系统，其通过两次雷达扫描来扫描飞行器的飞行路径，指示在局部水平以上的上部仰角和指向滑翔坡下方的较低仰角扫描。 雷达从高程扫描返回，用于检测微爆炸的核心。 使用核心的风切片的核心和模型用于在较低仰角扫描中选择角度和范围单元候选，用于危险检测处理。 指向地面的较低扫描中的候选人用于创建根据预定危险阈值测试的危险图。 门槛违规导致飞行员警报。 危险图包括通过径向流出中的模型系数确定的垂直因子作为高度的函数。 本发明应用模型，使用模型的垂直危险和沿着飞机的下坡面向水平危险的高度比例，确定沿着滑坡的总危害因子。 本发明还包括具有两个脉冲重复频率的雷达扫描，其允许消除不相关的返回。 该系统还包括与滑动方位窗口的后检测集成，以增强信噪比。 该系统还将单个范围门内的速度相结合，以产生表示该范围内风速的速度。

公开(公告)号：US5196854A

公开(公告)日：1993-03-23

申请号：US714132

申请日：1991-06-13

Applicant: Bruce D. Mathews

Inventor： Bruce D. Mathews

IPC: G01S7/292 ,  G01S13/89 ,  G01S13/95

CPC classification number: G01S7/2926 ,  G01S13/89 ,  G01S13/953

Abstract: The present invention is a radar system that corrects for changes in apparent reflectivity and two-way precipitation attenuation using a correction curve that includes a segment for low rain rates, a segment for high rain rates and, if desired, a transition segment for medium rain rates. The signal to noise ratio is further improved by using a sliding azimuth window during post detection integration processing.

Abstract translation: 本发明是一种雷达系统，其使用包括低雨率段的修正曲线，用于高雨率的段，以及如果需要，用于中等下雨的过渡段来校正表观反射率和双向降水衰减的变化 价格。 通过在后检测集成处理中使用滑动方位窗口，进一步提高了信噪比。

公开(公告)号：US5539409A

公开(公告)日：1996-07-23

申请号：US269321

申请日：1994-06-30

Applicant: Bruce D. Mathews ,  Michael J. Albano ,  Guy T. Railey ,  Fran Miller

Inventor： Bruce D. Mathews ,  Michael J. Albano ,  Guy T. Railey ,  Fran Miller

IPC: G01S13/95

CPC classification number: G01S13/953

Abstract: The present invention improves upon conventional windshear data processing techniques in three mutually exclusive aspects. First, the present invention provides an improved method and system for detecting microburst downdraft candidates. The improvement lies in its capability of detecting multiple candidates in range. Because of the added capability to detect multiple candidates in range, the present invention also provides an improved method and system for azimuthal association of the multiple candidates in range to define an accurate locus of headwind and tailwind pairs. Second, the present invention provides an improvement in that it utilizes a non-circularly symmetric spatial model to compute the vertical component of a total hazard factor. Third, the present invention provides an improvement in the accurate detection of small radii microbursts by correcting bias present in the data from which the small radii microbursts may be detected.

Abstract translation: 本发明在三个相互排斥的方面改进了传统的风切变数据处理技术。 首先，本发明提供了一种用于检测微爆下降气候候选物的改进方法和系统。 改进在于其检测范围内的多个候选人的能力。 由于具有检测范围内的多个候选者的附加能力，本发明还提供了一种用于范围内的多个候选者的方位关联的改进方法和系统，以定义逆风和顺风对的精确轨迹。 其次，本发明提供了一种改进，即利用非圆对称空间模型来计算总危害因子的垂直分量。 第三，本发明通过校正可能检测到小半径微爆发的数据中存在的偏置来提供对小半径微爆的精确检测的改进。

公开(公告)号：US4417248A

公开(公告)日：1983-11-22

申请号：US279497

申请日：1981-06-30

Applicant: Bruce D. Mathews

Inventor： Bruce D. Mathews

IPC: G01S13/44 ,  G01S13/93 ,  G01S13/00

CPC classification number: G01S13/93 ,  G01S13/4445

Abstract: In a monopulse radar, a system is included to adaptively assess a detected threat in accordance with the relative bearing representative measurements thereof to determine the collision potential of the threat with the radar. The monopulse radar is operative to detect at least one potential threat and to track the threat through a sequence of time increments beginning with the detection thereof. For each time increment, a signal representative of the relative bearing of the detected threat is derived, forming a sequence of relative bearing representative signals respectively corresponding to the sequence of time increments. From the derived relative bearing signals, the assessor system forms, at each of a selected number of increments, a signal representative of an adaptively updated initial approach bearing measurement of the detected threat with respect to the radar, a signal representative of an adaptively filtered estimate of an instantaneous relative bearing measurement of the detected threat with respect to the radar, and a signal representative of the level of confidence of the generated instantaneous relative bearing measurement signals. A comparison test is conducted at each of the selected number of time increments for detecting a deviation between correspondingly generated initial approach and instantaneous relative bearing measurement signals which is greater than the corresponding level of confidence signal, the event being indicative of a non-collision bearing behavior of the detected threat.

Abstract translation: 在单脉冲雷达中，包括一个系统以根据其相对轴承代表性测量来自动地评估检测到的威胁，以确定与雷达的威胁的碰撞潜力。 单脉冲雷达可操作以检测至少一个潜在威胁，并通过从其检测开始的一系列时间增量来跟踪威胁。 对于每个时间增量，导出表示检测到的威胁的相对方位的信号，形成分别对应于时间增量序列的相对承载代表信号的序列。 从派生的相对承载信号中，评估者系统以选定数量的增量中的每一个形成表示相对于雷达检测到的威胁测量的自适应更新的初始方法的信号，表示自适应滤波估计的信号 对相对于雷达的检测到的威胁的瞬时相对轴承测量，以及表示所生成的瞬时相对承载测量信号的置信度的信号。 在每个选定数量的时间增量中进行比较测试，以检测相应产生的初始进场与瞬时相对轴承测量信号之间的偏差，该相对轴承测量信号大于相应的置信度信号水平，该事件表示非碰撞轴承 检测到的威胁的行为。

公开(公告)号：US4593286A

公开(公告)日：1986-06-03

申请号：US488236

申请日：1983-04-25

Applicant: Bruce D. Mathews ,  James H. Mims

Inventor： Bruce D. Mathews ,  James H. Mims

IPC: G01S7/288 ,  G01S13/02 ,  G01S13/22 ,  G01S13/42 ,  G01S7/42 ,  G01S13/72

CPC classification number: G01S13/426 ,  G01S13/225 ,  G01S7/288 ,  G01S2013/0272

Abstract: A method of time scheduling mode dwell times corresponding to a multiplicity of targets, displaced in angle, range and velocity, in the frame time of an agile beam coherent radar without reducing the performance of the radar is disclosed. Targets corresponding to a plurality of target mode dwell times scheduled to a common time interval are grouped into a set of pulse repetition frequencies (PRF's) which make the targets visible in both range and doppler. The radar is varied to a different of the set for each coherent integration time of the common time interval. The mode dwell times of the targets of a PRF grouping are interleaved in their corresponding coherent integration time by time positioning the different target time event patterns with respect to the fixed interpulse period thereof to avoid eclipsing of the time events. The time positioning of the event patterns includes a combination of trial positioning and translating each of the target event patterns in a prioritized manner with the purpose of avoiding eclipsing of the time events thereof. The translating of a former target pattern to a new trial position may be performed by delaying the pattern start phasing thereof with respect to the fixed interpulse period of the corresponding integration time.

Abstract translation: 公开了一种在不降低雷达性能的敏捷光束相干雷达的帧时间内对应于在角度，范围和速度上移位的多个目标的时间调度模式驻留时间的方法。 对应于调整到公共时间间隔的多个目标模式停留时间的目标被分组成一组脉冲重复频率（PRF），使得目标在两个范围和多普勒范围内都可见。 对于公共时间间隔的每个相干积分时间，雷达变化为不同的雷达。 通过对不同的目标时间事件模式相对于其固定的脉冲间隔进行时间定位来避免PRF分组的目标的模式驻留时间在其对应的相干积分时间中交错，以避免时间事件的黯淡。 事件模式的时间定位包括尝试定位的组合和以优先排序的方式翻译每个目标事件模式，目的是避免对其时间事件的黯淡。 可以通过将相对于相应的积分时间的固定的脉冲间隔延迟其模式开始定相来执行将前一目标模式转换到新的试用位置。