HEW-784预警雷达

HEW-784是意大利海军EH101直升机预警型的直升机机载预警雷达。这种雷达系统能全天候监视入侵的飞机和进行海上监视和巡逻。 HEW-784雷达的主要任务是探测和跟踪多个高空与低空目标,探测掠水飞行导弹。次要任务是探测和跟踪多个海面目标,地形测绘。它有空对空和空对地两种工作方式。在空对空工作方式时,能进行下视监视(动目标指示),在地面杂波中用多普勒滤波能探测和跟踪高径向速度目标(达128个),晴天平视监视和对导弹告警。在空对地方式时,能探测和跟踪海面目标(达64个),在短、中、长距离上进行地形测绘。它的工作频率为X波段、8～12.5千兆赫,北约     

机载相控阵雷达修理保障模式的探索

根据我军现役及在研先进战机机载相控阵雷达的技术特点，针对机载相控阵雷达修理线建设工作对维修模式的要求进行了阐述，总结了机载有源相控阵雷达修理的主要难点，并提出了相控阵雷达修理线建设的重点工作，以保证部队作训任务完成。     

MP-RTIP作用范围很广的机载多功能雷达

美国空军正在发展一种不仅能探测飞机和车辆,还能探测和跟踪低飞巡航导弹的MP-RTIP(多平台-雷达技术引入计划)机载监视雷达.这种机载有源相控阵(AESA)雷达将装在正在研发的E-10A广域监视(WAS)飞机和"全球鹰"无人机上.     

美国防部的先进技术概念演示计划

美国国防部计划在1997财年将花9900万美元进行18项先进技术概念演示(ACTD),其中包括先进的机载监视项目。这些演示是2年以前开始的,其中由通用原子能公司研制的“掠夺者”无人机现已在波黑地区使用。一个ACTD项目是安装在高空机载平台上的树叶穿透雷达和超频谱成像(HSI)。美国空军希望采用这种系统探测隐蔽和伪装的目     

ADS系统最小位置报告率研究

AnAnalysisoftheMinimalReportRateinADS一、简介自动相关监视（ADS）系统作为空中交通管制系统中的一种新的监视手段,受到各国普遍重视。自动相关监视（ADS）系统由空地数据链、导航数据源和先进的地面数据处理和显示系统组成。机载导航设备获得的信息佳少包括飞机识别和四维位置信息）,以适当的位置报告率通过地空数据链传送到地面,在自动相关监视终端上形成空中交通信息,为管制员提供伪雷达显示。ADS系统可以为飞行在雷达覆盖区以外,特别是海洋和荒漠空域的飞机提供监视手段;能够及时检测到航路点引入差错和ATC环路差错;…     

雷神二次雷达典型故障分析

航管监视雷达是空中交通管制员的“千里眼”，随着雷达管制的实施，航管监视雷达对监视空中飞行目标起着越来越重要的作用，实现管制区域内的多重雷达覆盖也是发展趋势。雷神二次雷达是从国外引进的一套先进的雷达设备，在全国很多机场得到了广泛应用。在维护雷达设备过程中，面对故障现象，如何准确地分析、判断故障点，采取一切必要措施快速恢复设备正常工作，对于确保空中交通管理安全有着重要的意义。笔者将维护雷神二次雷达中遇到的典型故障作了简要的分析总结，希望能对同行们的工作起到一定的借鉴作用。     

机载预警雷达技术发展探析

分析了世界各国预警雷达发展概况,分别对一至四代预警雷达的功能等进行了研究;论述了新一代预警雷达的工作原理、雷达组成、功能、工作过程和技术特点;指出了机载预警雷达未来发展的关键技术,包括有源相控阵雷达技术、数字阵列雷达技术、共形相控阵技术,双/多频段雷达技术及先进的信号处理技术等。     

S模式应答机在飞行中的应用

新航行系统是国际民航组织(ICAO)提出并计划在2010年在全球推广的新一代通信、导航、监视和空中交通管理系统(CNS/ATM).其监视系统的发展方案是二次雷达监视(SSR)和自动相关监视(ADS).虽然A/C模式的二次雷达使用比较广泛,但它存在很多缺陷,ICAO把发展S模式二次雷达作为一种非常重要的监视方案推广,机载应答机也正在逐渐改装为S模式应答机.     

“海妖”直升机装备海面监视雷达

美国纽约电话公司宣布它已收到了卡曼国际宇航公司的一份订购合同,合同要求订购电话公司的海面监视雷达,以便用于卡曼公司的SH—2G“超海妖”直升机上。澳大利亚和新西兰皇家海军已采购了大约15架“海妖”直升机用于海面监视和跟踪,并将部署到它们的逐驱舰上。澳大利亚皇家海军订购的11架“海妖”直升机将于2001年     

空间目标监视雷达技术探讨

本文分析了空间目标分布特性和国外空间目标监视技术发展趋势，提出了我国发展空间目标监视雷达需要注重研究的关键技术。     

关于隐身目标检测与跟踪的几点思考

隐身武器装备的出现和发展对传统雷达的检测与跟踪性能构成了严峻的威胁。首先,分析了隐身目标检测与跟踪中存在的一些关键问题;然后,对高机动隐身目标、多隐身目标、机载高脉冲重复频率雷达的多隐身目标等检测与跟踪问题进行了初步的探讨,并提出了一些可行的解决方案。     

The Series 320 Radar: Three-Dimensional Air Surveillance for the 1980s

Air surveillance radars for this decade will be required to provide reliable target location and trajectory information in height as well as the conventional geographical coordinates. These threedimensional radars will perform this task in spite of adverse environmental conditions such as ground, airborne clutter, and electromagnetic interference. The use of powerful false-alarm control processing allows automatic target detection and remoting of target information without overloading central processing capabilities. The technological evolution of the past decade has allowed sophisticated analysis, antenna/receiver/transmitter design, and signal/data processing techniques to be applied to the next generation of practical production radar systems. These radars will meet more severe performance requirements and will be significantly improved in terms of reliability, maintainability, and life cycle cost considerations. A candidate radar to fulfill the air surveillance role of this decade is the Series 320 radar manufactured by ITT Gilfillan.     

Hierarchical resource management in adaptive airborne surveillance radars

In this paper we present hierarchical resource management algorithms for adaptive airborne surveillance radars. By abstracting the physical layer sensor performance into a quality of service measure, the resource management problem is formulated as a constrained Markov decision process. A two-level (two-timescale) resource management algorithm is presented based on Lagrangian relaxation. A numerical example is given with scenarios involving different target densities.     

Medium PRF Performance Analysis

A discussion of various types of x-band airborne radars is presented together with their systematic development through the years to the present time. Starting with simple, low pulse-repetition frequency (PRF) radars for measuring radar-target range, airborne radar development proceeded with more sophisticated high PRF Doppler radars where radar-target range and range rate were measured simultaneously. The use of Doppler (frequency) in signal processing allowed the separation of moving from nonmoving targets (ground), enabling the detection of moving targets in the presence of ground clutter. More recent developments in waveform generation and selection has resulted in the development of medium PRF radars, whereby a greater degree of tactical flexibility in target detection is achieved by combining the desirable features of both low and high PRF radars. Part of the available literature gives an overview, together with a specific example of the design and performance of an airborne medium PRF radar. Here, however, the systematic evolution of these radars is emphasized and the necessary theoretical background is developed for their performance calculations. Modern day airborne radars may be equipped with all three modes of operation, low, medium, and high PRF, allowing the operator to utilize the mode best suited for the tactical encounter. Low PRF and high PRF radars have been described elsewhere and are given here primarily for the sake of completeness and for the necessary background for developing medium PRF radar equations. They are also needed for developing the reasons why medium PRF radars came into being.     

Interrupted synthetic aperture radar (SAR)

The severe timeline demands imposed by the multi-mode functions of modern airborne radars utilizing active array antennas, may result in interrupted SAR data collections and consequent corrupted images. To recover the image quality, we interpolate the missing data using the Burg algorithm, allowing interrupt ratios of up to 30%     

机载相控阵雷达中抑制杂波的线性预测法

从一个多通道自回归过程拟合杂波信号的概念出发 ,提出了用线性预测法实现机载相控阵雷达的时空二维自适应信号处理。研究表明 ,杂波过程可以用一个低阶的多通道自回归过程很好地拟合 ,从而使用一个低阶的线性预测处理器以较低的代价实现准最优的处理。同时 ,这种低阶的线性预测处理器还具备冗余的自由度以对付除杂波外的其他有色噪声和干扰     

Reacting to new air defence threats: a netcentric approach to the Hungarian air defence system augmented by VHF radars

Different types of distributed radar systems and data fusion centers are increasingly used by surface-based air defense systems. Besides the well-established airborne threats, new platforms for air surveillance and attacking devices have appeared and recognized air picture (RAP) production needs to be revised and modified following the events of September 11, 2001. From a military operational and logistic support point of view, it is well-known that not only the long range radars currently in operation, but also the recently procured radars, degrade in performance rapidly and their maintenance costs are high. Using the possibilities offered by emerging technical developments, the problem is to upgrade sensors and existing infrastructure in a way that exploits the information gathered optimally. It is the opinion of this author that one of the most promising approaches to emphasis net-centricity is the use of radar-triangle netcentric structures augmented by netted VHF radars to solve these tasks in a cost-effective manner. This work introduces an analysis of a solution that fully integrates newly required capabilities into the current long range radar net and infrastructure, keeping research and development (R&D) and maintenance at a low cost.     

机载多传感器信息融合试飞技术研究

在简要论述机载多传感器信息融合基本原理和不同传感器工作特性的基础上,提出了机载多传感器信息融合的试飞思路、试飞设计原则以及最终试飞结果的评价方法,并在实际的飞行试验中得到了应用。试飞结果表明:利用试飞方法能够充分验证机载多传感器信息融合系统的功能、性能,而且对于同类航空电子系统多传感器信息融合的飞行验证具有借鉴意义。     

Polish radar technology

Polish radar research and development since 1953 is reviewed, covering the development and production of surveillance radars, height finders, tracking radars, air traffic control (ATC) radars and systems, and marine and Doppler radars. Some current work, including an L-band ATC radar for enroute control, a weather channel for primary surveillance radar, signal detection in non-Gaussian clutter, adaptive MTI filters and postdetection filtering, and a basic approach to radar polarimetry, is examined.<>     

基于变分贝叶斯的星载雷达非线性滤波

星载雷达由于其探测范围广、距离远、全天候等优点，在预警防御系统中占有十分重要的地位。然而，由于观测平台的高速运动以及摄动干扰、传感器观测非线性等问题，使得星载雷达目标高精度跟踪带来严峻挑战。针对星载雷达非线性状态估计问题，采用一种基于变分贝叶斯的非线性滤波方法，该方法通过将非线性状态估计问题转化为优化问题，通过迭代优化获得了闭环解析解。此外，针对坐标变换中俯仰角量测缺失问题，提出了一种基于先验目标高度的俯仰角估计方法。通过数值仿真，验证了所提方法较传统非线性滤波方法，如扩展卡尔曼滤波、不敏卡尔曼滤波、转换量测卡尔曼滤波，具有更好的估计精度。