United States Government sniper UAV systems: urban artifact-drone on terrorism, terrorism-IT information
People with unmanned aerial vehicle prices and operational simplicity, gradually, everyone has access to such a small aircraft. Different from conventional aircraft, unmanned aerial vehicle has three main features:
First, their flight altitude is relatively low (approximately less than 400 feet), making them perfect hiding themselves in the complex terrain;
Second, it is also relatively slow speed (probably less than 90 mph), making it difficult to integrate them with other objects that are moving distinguished; and, third, its volume is relatively small (probably less than 55 pounds), which makes them hard to detect with the naked eye.
These three characteristics make unmanned aerial vehicles are likely to be widely used in terrorist attacks and military-related fields, which is worrying. You know, two months ago, United Kingdom official ISIS announced they found terrorist organizations have been using commercial UAVs, Syria and Iraq's army launched explosive attacks. These drones are also equipped with a surveillance camera, the terrorists were to draw a map of the location of the enemy through the use of camera.
Although core regions of ISIS from the United States there are about 6000 miles, United States China Defense Advanced research projects Agency (Darpa) still want to nip it, they want to ensure that the evil terrorist organization will not attack on their home in the near future. Therefore, the United States Government plans to use a sniper UAV surveillance system to combat drones in urban crime.
Recently, Darpa started a group called the sniper UAV Aerial Dragnet surveillance program, it can track all flights over the city to less than 1000 feet of the UAS. Meanwhile, equipped with sensor systems can monitor the buildings high up in the dynamic , so even in case of not knowing where the drones, the system was to pinpoint them, so as to fight against those based on drones for attacks and other illegal and criminal activities.
In a statement issued in the Darpa, we know that, despite the many tracks from all walks of life have developed UAV system in complex urban landscape, but they also are not useful-especially in the field of vision often by buildings and trees block the downtown area. And to make matters worse, many vehicles are moving at the same speed, and this greatly interferes with the tracking system for real-time monitoring of the environment over the city.
"Aerial Dragnet through research and development to meet the urban mini-UAV systems basic functions, so that non-Visual tracking and identifying slow-speed, low-altitude flight of the potential threat from possible. Meanwhile, Darpa Aerial Dragnet systems output data can be used, draw a new airspace common operational plans, and transmitted over a secure data link to the authenticated user. "Darpa explained.
Because the UAV market is expanding, Darpa may also signal processing software system can be carried on the cheap sensors, installed on the existing UAV in the market. They can develop only a flying platform is expected to cover the seven-square-mile-wide system, and its payload will not cost more than $ 10,000.
There is no doubt that this is a tremendous scientific and technological innovations and military weapons in the context of a renewal of the world. In the forthcoming September 26, Darpa will be organizing an event, people of this city for flight monitoring platform for building developments. Make believe that this form of collective wisdom is great, after all, the master in civil.
美国政府发布狙击无人机系统：城市反恐神器 - 无人机,反恐 - IT资讯
随着无人机价格的亲民化以及操作的简易化，渐渐地，每个人都有机会接触到这种小型飞行器。与传统飞行器不同，无人机有三大特点：
第一，它们的飞行海拔相对较低（大约小于400英尺），这让它们可以在复杂的地势中完美地隐藏自己；
第二，它的移动速度也相对较慢（大概小于90海里/小时），这让人们很难将它们与其他正在移动的物体分辨开来；第三，它的体积相对较小（大概小于55磅），这让它们很难被肉眼察觉。
这三大特点使无人机很可能被广泛地运用于恐怖袭击和军事相关领域，这着实令人担忧。要知道，两个月之前，英国官方曾宣布他们发现恐怖组织ISIS已经利用商业无人机，对叙利亚和伊拉克的军队发起了爆炸性袭击。这些无人机还搭载了一个监控相机，恐怖分子们可以通过使用相机绘制敌方所在地的地图。
尽管ISIS活动的核心地区离美国大概有6000英里远，但美国中国国防部先进研究项目局（Darpa）还是想要防范于未然，他们要确保这样邪恶的恐怖组织不会在不久的将来袭击自己的家园。所以，美国政府计划用一个狙击无人机监控系统来打击无人机在市区的犯罪。
近日，Darpa启动了一个叫Aerial Dragnet的狙击无人机监控项目，它可以追踪大城市上空所有飞行高度低于1000英尺的无人飞行系统。同时，搭载了感应器的飞行系统可以在高空中监控建筑物之间的动态，如此一来，即便是在不知道无人机具体位置的情况下，这个系统还是对它们进行精确定位，从而打击那些基于无人机开展的恐怖袭击和其他违法犯罪行为。
在Darpa发表的声明中，我们得知，尽管各界已经研发了很多追踪无人机的系统，但这些系统在复杂的城市地貌中还是不够实用——尤其在视野经常被建筑物和树木遮挡的市区。更糟糕的是，很多交通工具都在以一样的速度移动，这极大地干扰了追踪系统对城市上空环境的实时监控。
“Aerial Dragnet想要通过研发适应市区小型无人机基本功能的系统，使非视距跟踪和识别慢速、低海拔飞行的潜在威胁物成为可能。同时，Darpa可以利用Aerial Dragnet系统输出的数据，绘制一个不断更新的领空通用作战图，并通过安全数据链接传输给经过认证的用户。”Darpa方解释道。
因为无人机市场正在不断扩张，Darpa可能还会把能被软件识别的信号处理系统搭载在价格低廉的感应器上，再安装于市面现有的无人机上。他们期望能研发出仅用一个飞行平台就能够覆盖七平方英里范围的系统，而实现其有效载荷的成本将不超过一万美金。
毫无疑问，这是一项翻天覆地的科技革新，也是世界范围内军事武器的一次更新换代。在即将到来的9月26日，Darpa会组织一个活动，让市民们为这个全市范围内飞行监控平台的建设出谋划策。小编认为这种形式的集思广益是极好的，毕竟高手在民间嘛。