问几个问题

黑鸟

AC6
1。15个勋章怎么获得？
2。7关后半段怎么用机炮把那些无人机扫下来？
先问这么多吧  没时间
现实
1。何为相控阵雷达？
2。除了F-18E/F和F22还有哪架战斗机有地形显示器？.

japp

现实
1。8知道
2。每架有MFD的飞机基本都配备吧,现在这种东西不是已经实现模块化了么

飞行果酱jam

现实中的问题请登陆百毒、google查询。

greenfalken

AC6
1.游戏多通几遍。
2.技术的话，多练习。运气的话，任务更新前最好保持支援槽全满，我拿航炮章的时候，这关最后架就是靠友军击落的。

黑鸟

说了都等于没说。。。。。。。。。。

彩虹熊

下面是引用黑鸟于2007-11-26 13:28发表的:
说了都等于没说。。。。。。。。。。

全勋章一会儿我发帖吧，请稍等，整理也稍需要时间，正在整理

如果想要机炮章，不用自虐去用机炮击落无人机吧，叫友军支援集中攻击那架Ilya Pasternak的CFA-44

黑鸟

第7关也有CFA44？？？

彩虹熊

下面是引用黑鸟于2007-11-26 13:53发表的:
第7关也有CFA44？？？

弄错了 出糗了

那关你等待UAV诱导大杀器爆炸后，它会短暂地停留在爆炸位置，冲上去可以击落
确实在那一关尽量增援槽满，虽然好像友军对付UAV能力没有以往那么无敌，但仍旧很有用

彩虹熊

PS：转 百度知道



有读者问：提起雷达，人们自然会联想到那不停转动的天线，半圆形的像个大锅盖，弧形的像块西瓜皮，矩形的像几排鱼骨，五花八门，形态各异。然而，相控阵雷达则与众不同。它不仅看上去像座平顶的金字塔，而且还不用转动天线。那么它是如何来进行扫描发现目标的呢？

一般的雷达波束扫描是靠雷达天线的转动实现的，被称为机械扫描。而相控阵雷达是用电的方式控制雷达波束的指向变动来进行扫描发现目标的。这种方式被称为电扫描。相控阵雷达虽然不能像其他雷达那样靠旋转天线来使电磁瓣转动，一个相位一个相位地进行搜索。但它自有自己的“绝招”，那就是使用“移相器”来实现电磁瓣转动。

在相控阵雷达直径为几十米的圆形天线阵上，排列着上万个能发射电磁波的辐射器，每个辐射器配有一个“移相器”，每个“移相器”都由电子计算机控制。当雷达工作时，电子计算机就通过控制这些“移相器”，来改变每个辐射器向空中发射电磁波的“相位”，从而使电磁瓣能像转动的天线一样，一个相位一个相位地偏转，从而完成对空搜索使命。例如，美国装备的“铺路爪”相控阵预警雷达在固定不动的圆形天线阵上，排列着15360个能发射电磁波的辐射器和2000个不发射电磁波的辐射器。这15360个辐射器分成96组，与其他不发射电磁波的辐射器搭配起来。这样，每组由各自的发射机供给电能，也由各自的接收机来接收自己的回波。所以，它实际上是96部雷达的组合体。如果我们把通常的雷达称作“个体户”，那么相控阵雷达就相当于一个“合作社”了。

相控阵雷达使用1个不动的天线阵面，就可以对120度扇面内的目标进行探测，使用3个天线阵面，就能实现360度无间断的目标探测和跟踪。“铺路爪”就有3个固定不动的大型天线面阵，可以对360度范围内的目标进行探测，探测距离达5000公里。

当相控阵雷达警戒、搜索远距离目标时，虽然看不到天线转动，但上万个辐射器通过电子计算机控制集中向一个方向发射、偏转，即使是上万公里外来袭的洲际导弹和几万公里远的卫星，也逃不过它的“眼睛”。如果是对付较近的目标，这些辐射器又可以分工负责，有的搜索、有的跟踪、有的引导，同时工作。每个“移相器”可根据自己担负的任务，使电磁瓣在不同的方向上偏转，相当于无数个天线在转动，其速度之快非一般天线所能相比。正是由于这种雷达天线摒弃了一般雷达天线的工作原理，利用“移相器”来实现电磁瓣的转动，人们给它起了个与众不同的名字——相控阵雷达，代表着“相位可以控制的天线阵”的含义。

彩虹熊

转：wiki

Active Electronically Scanned Array
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Please help improve this article by adding reliable references. Unsourced material may be challenged and removed. (September 2007)

APAR AESAAn Active Electronically Scanned Array (AESA), also known as active phased array radar is a type of radar whose transmitter and receiver functions are composed of numerous small transmit/receive (T/R) modules. AESA radars feature short to instantaneous (millisecond) scanning rates and have a desirable low probability of intercept.

As solid state devices, AESA radars have vastly simpler mechanical designs. They require no complex hydraulics for antenna movement nor hinge appendages. The AESA radar occupies less space than typical radar, because of its lesser infrastructure requirements and of course its absent range of motion. With these improvements, maintenance crews are far less severely taxed, and the radar is much more reliable.

Main advantages over mechanically scanned arrays are extremely fast scanning rate, much higher range, tremendous number of targets being tracked and engaged (multiple agile beams), low probability of intercept, ability to function as a radio/jammer, simultaneous air and ground modes, Synthetic Aperture Radar.

Mechanical steering may be added to AESA radars for increased radar field of view; The movement performance of the antenna would not need to be nearly as great as that of a traditional radar, as the radar sweep is not integral to the contact update rate.

Contents [hide]
1 Features
2 The Difference Between AESA and PESA
3 List of AESA radars
3.1 Airborne systems
3.2 Ground and sea-based systems
4 See also
5 External links



[edit] Features
AESA radars have:

High ECM resistance:
The extremely fast scan of the radar makes it diffi*** for an ECM device to find the correct azimuth and elevation in which the radar's main lobe is currently directed.
High gain associated with AESA radars gives them high ERP, which makes it diffi*** for an active ECM device, using noise jamming techniques, to successfully jam such a radar.
The extremely fast scan of the emitter gives it LPI features.
Less suspectibility to voltage failures, due to the relatively very low voltage in which each and every single radiating element operates; This is combined with graceful degradation.

[edit] The Difference Between AESA and PESA
In a passive electronically scanned array (PESA), the microwave feed network in the back of the antenna is powered by a single radio frequency (RF) source (magnetron, klystron, TWT, etc.), sending its waves into phase shift modules (usually digitally-controlled), which, in turn, feed the numerous emitting elements.

An AESA, instead, has an individual RF source for each of its many transmit/receive elements, making them "active".

This provides for a graceful degradation, so that many T/R modules may fail and the radar would not stop functioning.

AESA radars replace the traditional radar RF sources (magnetron/klystron/TWT), which usually require extremely high operating voltage and power, with multiple solid state RF sources operating at low voltage (40 to 60 volts). Solid state electronics use silicon or gallium arsenide based power amplifier technology and benefit to some extent from mass production techniques developed for consumer electronics. US based manufacturers of the AESA radars used in the F22 and Super Hornet include Northrop Grumman [1] and Raytheon [2]. and These companies also design, develop and manufacture the transmit/receive modules which comprise the 'building blocks' of an AESA radar. The requisite electronics technology was developed in-house via Department of Defense research programs such as MIMIC Program [3] [4].


[edit] List of AESA radars

[edit] Airborne systems
Northrop Grumman/Raytheon AN/APG-77, for the F-22 Raptor
Northrop Grumman AN/APG-80, for the F-16E/F Block 60 Fighting Falcon
Northrop Grumman AN/APG-81, for the F-35 Joint Strike Fighter
Northrop Grumman Multi-role AESA, for the Boeing Wedgetail (AEW&C)
Northrop Grumman APY-9, for the E-2D Advanced Hawkeye
Raytheon AN/APG-63(V)2 and AN/APG-63(V)3, for the F-15C Eagle
Raytheon AN/APG-79, for the F/A-18E/F Super Hornet
Raytheon AN/APQ-181 (AESA upgrade currently in development), for the B-2 Spirit bomber
AMSAR, from the European GTDAR consortium, for Eurofighter and Rafale fighters
RBE2-AA Radar à Balayage Electronique 2 - Active Array
SELEX Seaspray 7000E, for helicopters
SELEX Vixen 500E
Mitsubishi Electric Corporation AESA for the Mitsubishi F-2 fighter
Ericsson Erieye AEW&C and NORA AESA for JAS 39 Gripen
Phazotron NIIR Zhuk-AE, for MiG-35
Tikhomirov NIIP Epaulet-A
Elta EL/M-2083 aerostat-mounted air search radar
Elta EL/M-2052, for fighters
Elta EL/M-2075 radar for the IAI Phalcon AEW&C system

[edit] Ground and sea-based systems
APAR Thales multi-function radar, primary sensor of Dutch De Zeven Provinci雗 and German Sachsen class frigates
Selex EMPAR (European Multifunction Phased Array Radar)
Elta EL/M-2080 Green Pine ground-based early warning AESA radar
Elta EL/M-2248 MF-STAR multifunction naval radar
AN/SPY-3 multi-function radar for U.S. DD(X), CG(X) and CVN-21 next-generation surface vessels
Raytheon U.S. National Missile Defense X-Band Radar (XBR)
MEADS's fire control radar
THAAD system fire control radar
SAMPSON BAE Insyte multi-function radar for UK. Type 45 destroyers
FCS-3 Mitsubishi Electric Corporation (Melco)/Thales Nederland C-band active phased array
CEAFAR CEA Technologies Naval Phased Array