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全部话题 - 话题: radars
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c*****e
发帖数: 737
1
Boeing 777-2H6ER
Registration(75008F)
9M-MRO
Altitude
0 ft Vertical Speed
0 fpm
Speed
471 kt Track
40°
Latitude
6.93 Longitude
103.59
Radar
F-WMKC1 Squawk
2157
之前
Aircraft(B772)
Boeing 777-2H6ER
Registration(75008F)
9M-MRO
Altitude
35,000 ft Vertical Speed
0 fpm
Speed
474 kt Track
25°
Latitude
6.8 Longitude
103.52
Radar
F-WMKC1 Squawk
2157
z*****4
发帖数: 835
2
来自主题: Military版 - 竟然有这么多被打下来的飞机
搜了下wiki,发现除了毛子以外,PLA、NATO还有许多大国小国都有打飞机的历史。
http://en.wikipedia.org/wiki/List_of_airliner_shootdown_inciden
1940s[edit]
Kaleva OH-ALL[edit]
Main article: Kaleva (airplane)
Junkers Ju 52-3/mge "Kaleva" OH-ALL was a civilian transport and passenger
plane operated by the Finnish carrier Aero O/Y, shot down by two Soviet
Ilyushin DB-3 bombers on June 14, 1940, while en route from Tallinn, Estonia
, to Helsinki, Finland.[1] This occurred during the Interim Peace between
Finland and the Soviet Union, t... 阅读全帖
O*******d
发帖数: 20343
3
Actual Air Traffic Control Audio Tape of the Valujet Crash
http://www.hazmat-news.com/archives/valujettranscri.html
Here are some of the radio transmissions, without some of the comments made
by other planes traveling in the area at the same time:
Flight 592: Afternoon departure. Critter 592 is out of 500 going to 5,000.
Miami Departure (MD): Critter 592 departure, good afternoon, radar contact,
climb and maintain 7,000.
F592: 7,000, 592.
MD: Critter 592 turn left heading three-six-zero.
F592: t... 阅读全帖
w********s
发帖数: 1570
4
The Jindalee Operational Radar Network (JORN) is an over-the-horizon radar
network that can monitor air and sea movements across 37,000 km2. It has an
official range of 3,000 km. It is used in the defence of Australia and can
also monitor maritime operations, wave heights and wind directions.
x****u
发帖数: 12955
5

You are talking about military radar. Many civilian air traffic radar needs
transponder signal to identify aircraft.
t******g
发帖数: 462
6
my hypothesis
US F-22 flying during the night to Singapore. Due to its characteristics it
is not showing up on radars.
F-22 has oxygen generator problem, the pilot was temporarily not alert
F-22 is travelling at a fast speed and hit MH370
F-22 pilot wakes up, drive the damaged plane to base. Starting from the
collision the F-22 is detected by the radar
MH370 pilot is not lucky enough
y*****n
发帖数: 145
7
来自主题: Military版 - Rolls Royce and Boeing deny receiving data
SEPANG: Rolls-Royce and Boeing have denied receiving any flight-time
diagnostic data from the missing B777-200 after it was last tracked by civil
aviation radar.
Acting Transport minister Datuk Seri Hishammuddin Hussein said the aircraft
manufacturer and its engine maker did not receive any information from the
missing Malaysia Airlines aircraft at any time beyond 1:07 am on Saturday.
The aircraft was reported in the foreign media to have transmitted to data
some four hours after it vanished fro... 阅读全帖
A**4
发帖数: 2165
8
Don't forget that whatever kind of radar has range too. So it could be that
the spot just entering from the edge. However, it's important for them to
provide the radar system data.
g******o
发帖数: 4042
9
来自主题: Military版 - 美帝在全世界有多少基地
其实海外基地没有想象的多
http://en.wikipedia.org/wiki/List_of_United_States_military_bas
By state/district[edit]
US state abbrev map.png
About this image
Base
Joint[edit]
The Pentagon
Joint overseas[edit]
Pine Gap Joint Defence Space Research Facility, Alice Springs, Northern
Territory, Australia—used by United States armed forces, and CIA, in
partnership with the Australian Defence Force and the Australian
intelligence services.
War Reserve Stocks are located in many nations.
United States Army[edit]
Main ... 阅读全帖
w********t
发帖数: 12853
10
要知道发动机的所谓信号没有高度数据。
(CNN)
Report: Plane flew low to avoid radar
Whoever was flying the airplane may have flown below 5,000 feet and used
mountainous terrain as cover to avoid being detected by radar, the New
Straits Times newspaper in Malaysia reported Monday, citing unnamed sources.
CNN could not immediately confirm the newspaper's account, which is just
one of several as-yet unproven theories about what happened to the jetliner
after its last contact with flight controllers.
r******3
发帖数: 53
11
http://keithledgerwood.tumblr.com/post/79838944823/did-malaysia
------MH370 snuck out of the Bay of Bengal using SIA68 as the perfect cover.
It entered radar coverage already in the radar shadow of the other 777,
stayed there throughout coverage, and then exited SIA68’s shadow and then
most likely landed in one of several land locations north of India and
Afghanistan.
l*******g
发帖数: 27064
12
来自主题: Military版 - 马航飞机原来被美帝劫持了?
看得心惊肉跳:俄罗斯曝光旳马航"真相"
楼主 :yeyusam 发表于: 14-03-18 3:09
看的心惊肉跳:俄罗斯曝光马航事件真相
2014年03月18日 00:19 米尔网
文章转载自俄罗斯媒体文章,真实性未知
Russia “Puzzled” Over Malaysia Airlines “Capture” By US Navy
美国海军“俘获”马来西亚航班,俄罗斯“很困惑”
A new report circulating in the Kremlin today prepared by the Main
Intelligence Directorate of the General Staff of the Armed Forces (GRU)
states that Aerospace Defence Forces (VKO) experts remain “puzzled” as
to why the United States Navy “captured and then diverted” a Malaysia
Airlines civilian aircra... 阅读全帖
g********0
发帖数: 15010
13
看的心惊肉跳 俄媒曝光马航事件真相?!
文章转载自俄罗斯媒体文章,真实性未知
Russia “Puzzled” Over Malaysia Airlines “Capture” By US Navy
美国海军“俘获”马来西亚航班,俄罗斯“很困惑”
A new report circulating in the Kremlin today prepared by the Main
Intelligence Directorate of the General Staff of the Armed Forces (GRU)
states that Aerospace Defence Forces (VKO) experts remain “puzzled” as
to why the United States Navy “captured and then diverted” a Malaysia
Airlines civilian aircraft from its intended flight-path to their vast and
highly-secretive Indi... 阅读全帖
d*********o
发帖数: 6388
14
http://www.wnd.com/2014/03/top-general-heres-where-to-look-for-
Retired Lt. Gen. Thomas McInerney — the recipient of the Distinguished
Flying Cross, Bronze Star, Air Medal with 17 oak-leaf clusters,
Distinguished Service Medal and other honors — is suggesting searchers
looking for the missing Malaysia Airlines Boeing 777 take a look at possible
landing spots in Taliban-controlled Pakistan.
In an interview with Sean Hannity of Fox News, McInerney, now a contributor
to the network, said his recomm... 阅读全帖
z**********e
发帖数: 22064
15
http://www.nytimes.com/2014/03/18/world/asia/malaysia-airlines-
By MATTHEW L. WALD and MICHAEL S. SCHMIDT
WASHINGTON — The first turn to the west that diverted the missing Malaysia
Airlines plane from its planned flight path from Kuala Lumpur to Beijing was
carried out through a computer system that was most likely programmed by
someone in the plane’s cockpit who was knowledgeable about airplane systems
, according to senior American officials.
Instead of manually operating the plane’s controls,... 阅读全帖
z**********e
发帖数: 22064
16
http://www.eutimes.net/2014/03/russia-puzzled-over-malaysia-air
Posted by EU Times on Mar 14th, 2014 // 30 Comments
A new report circulating in the Kremlin today prepared by the Main
Intelligence Directorate of the General Staff of the Armed Forces (GRU)
states that Aerospace Defence Forces (VKO) experts remain “puzzled” as to
why the United States Navy “captured and then diverted” a Malaysia
Airlines civilian aircraft from its intended flight-path to their vast and
highly-secretive Indian Ocea... 阅读全帖
m*****n
发帖数: 1513
17
MH370 Malaysia plane: How maths helped find an earlier crash
Statisticians helped locate an Air France plane in 2011 which was missing
for two years. Could mathematical techniques inspired by an 18th Century
Presbyterian minister be used to locate the mysterious disappearance of
Malaysia Airlines Flight MH370?
In June 2009, Air France flight 447 went missing flying from Rio de Janeiro
in Brazil to Paris, France.
Debris from the Airbus A330 was found floating on the surface of the
Atlantic five d... 阅读全帖
n********n
发帖数: 8336
18
来自主题: Military版 - M俄罗斯媒体曝光马航事件真相
文章转载自俄罗斯媒体文章,真实性未知
Russia “Puzzled” Over Malaysia Airlines “Capture” By US Navy
美国海军“俘获”马来西亚航班,俄罗斯“很困惑”
A new report circulating in the Kremlin today prepared by the Main
Intelligence Directorate of the General Staff of the Armed Forces (GRU)
states that Aerospace Defence Forces (VKO) experts remain “puzzled” as
to why the United States Navy “captured and then diverted” a Malaysia
Airlines civilian aircraft from its intended flight-path to their vast and
highly-secretive Indian Ocean base locate... 阅读全帖
x****u
发帖数: 12955
19
来自主题: Military版 - 中国的预警机比美国的都先进?

Active Electronic Scanning Array radar on KJ2000 is indeed more advanced
than the mechanical scanning radar used on E3
b********n
发帖数: 38600
20
Pentagon’s big budget F-35 fighter ‘can’t turn, can’t climb, can’t run’
http://blogs.reuters.com/great-debate/2014/07/14/pentagons-big-
The U.S. military has grounded all its new F-35 Joint Strike Fighters
following an incident on June 23, when one of the high-tech warplanes caught
fire on the runway of a Florida air base. The no-fly order — which affects
at least 50 F-35s at training and test bases in Florida, Arizona,
California and Maryland — began on the evening of July 3 and continued
throu... 阅读全帖
x****u
发帖数: 12955
21
来自主题: Military版 - 151舰被老舰“击沉”

Radar against surface target has range of 30-50 nm at most, no matter what
kind of radar you have. This is the physical limit imposed by earth's
curvature.
To utilize the missile's range, you'll need target information from a
friendly unit that is either close enough or high enough to see over the
horizon.
x****u
发帖数: 12955
22
来自主题: Military版 - 151舰被老舰“击沉”

20
CPU
Oh, yes. Leave it to an armchair general to use Navigation radar for
missile attack. You must think all radars are the same and are
interchangeable in functions.
m********5
发帖数: 17667
23
你们老将忘文生义,太挫了
Passive Phased Array Radar,并不是说这个Radar是passive的,这是说这个Phased
array 是passive. 也就是说array只有天线单元,自己不产生功率。
无源相控阵自己不产生辐射,但是雷达必须要有辐射,因此PPA还是必须接驳雷达,有
一个单独的功率放大器,功率经过波导分配到阵列天线。
而有源阵是只阵列每个单独的单元自带功率发生器和接收器,因此不需要功率分配器。
由于这个多余的步骤导致无源阵雷达的电功率效率要比有源阵低,波束质量要比有源阵
低,电磁波有效功率也要比有源阵低。
至于谁的热量多,我倒是不知道,反正只要是阵列,不管有源无源其效率都比一般的雷
达低,发热量大。而无源阵效率更要低得多。
g*q
发帖数: 26623
24
According to radar data the aircraft entered Chinese Airspace at FL360 at
about 06:30Z, maintained 11,000 meters (FL361) in China until after passing
abeam Jilin (China), then climbed to 11,600 meters (about FL380) and
maintained that level until about Delian (China) when the aircraft began the
descent towards Seoul and left Chinese Airspace at about 08:30Z. No
altitude deviation is visible in the radar data. The aircraft touched down
in Seoul at 9:10Z.
x****u
发帖数: 12955
25
来自主题: Military版 - 沱江匿踪舰 (转载)

No ship based radar will ever be able to have LOS on those corners. The
stealth features on this ship is not designed to be stealthy against airborn
radar.
g*****y
发帖数: 169
26
China has recently launched a series of satellites to support its ASBM
efforts:
Yaogan-VII electro-optical satellite - 9 December 2009
Yaogan-VIII synthetic aperture radar satellite - 14 December 2009
Yaogan-IX Naval Ocean Surveillance System (NOSS) constellation (3 satellites
in formation) - 5 March 2010.[27]
Yaogan-XVI Naval Ocean Surveillance System (NOSS) constellation - 25
November 2012
China is reported to be working on an Over-the-horizon radar to locate the
targets for the ASBM.
x******g
发帖数: 33885
27
Ankara (AFP) - Turkey's F-16 jets were harassed and put on radar lock by an
unidentified MIG-29 aircraft on the Syrian border, after Russian fighter
planes violated Turkish airspace at the weekend, the Turkish military said
on Tuesday.
"Eight Turkish F-16 jets carried out reconnaissance flights over the Turkish
-Syrian border (on Monday) and during this mission our jets were held on
radar lock by an unidentified MIG-29 plane for a total of four minutes and
30 seconds," the army said in a stateme... 阅读全帖
d*b
发帖数: 21830
28
来自主题: Military版 - 感觉美国突然阳痿了
U.S. patrol sought to avoid provocation, not reinforce China island claim:
officials
WASHINGTON | By Andrea Shalal and David Brunnstrom
Subi reef, located in the disputed Spratly Islands in the South China Sea,
is shown in this handout Center for Strategic and International Studies (
CSIS) Asia Maritime Transparency Initiative satellite image taken September
3, 2015 and released to Reuters October 27, 2015. REUTERS/CSIS Asia Maritime
Transparency Initiative/DigitalGlobe/Handout via Reuters
Subi ... 阅读全帖
c****h
发帖数: 4968
29
美帝尽管巡逻,泼脏水……说到底,不过是在玩虚的。而土鳖就是一边推翻你的指责,
一边按部就班,来实的。这笔胡面瘫要强硬多了。
Possible Radar Suggests China Wants ‘Effective Control’ in Disputed Sea
http://www.nytimes.com/2016/02/24/world/asia/china-south-china-
Satellite Images Show China May Be Building Powerful Radar On Disputed
Islands
http://www.huffingtonpost.com/entry/south-china-sea-radar_us_56
h******t
发帖数: 872
30
http://nationalinterest.org/blog/the-buzz/us-air-force-official-f-35-could-beat-russias-stealth-pak-fa-18992
F-35 Sensor Fusion: early phases of “artificial intelligence.” and mission
data packages are loaded with Russian and Chinese fighter jets and pilot
info. 就像IBM的深蓝 VS. 60围棋棋手呀!
The computer algorithms woven into the F-35 architecture are designed to
leverage early iterations of what could be described as early phases of “
artificial intelligence.” Broadly speaking, artificial intelligence ... 阅读全帖

发帖数: 1
31
有人反驳我关于福建雷达不适用于干扰台湾铺路爪的说法,好吧,本人只好回应一下:
首先,看观察者网文章中这句话:”《简氏防务周刊》的报道中提到一个细节:在台湾
附近海域活动的美国战舰上的“宙斯盾”也遭到同样的高强度追踪干扰。美国海军关闭
雷达才得以摆脱。”这句话真不知从何说起。
Jane’s的原文是这样的:“According to a US source, the US Navy has to space
its large Aegis phased array radars within a naval battlegroup in order to
avoid radar interference.”
正确的翻译是这样的:“根据美国消息来源,美国海军自己战斗群的宙斯盾雷达之间必
须保持距离以免互相干扰。”也就是说,相控阵距离太近自然就会相互干扰,并不是宙
斯盾遭到了惠安雷达的干扰。
凡是懂英文的读者都能看出来,中文翻译是错误的理解了这句话。而观察网文章的作者
不看原文就继续错误引用。然后观察网的文章下面还继续扯淡,“至于美国的“宙斯盾
”舰在受到干扰时关闭雷达。专家认为,某种程度上这... 阅读全帖
n*******4
发帖数: 2285
32
空警2000当然要和波音E3比, 怎么能和舰载预警机比。wiki的AWACS条目里也提到:
The Chinese AWACS has a unique phased array radar (PAR) carried in a round
radome. Unlike the US AWACS aircraft, which rotate their rotodomes to give a
360 degree coverage, the radar antenna of the Chinese AWACS does not rotate
. Instead, three PAR antenna modules are placed in a triangular
configuration inside the round radome to provide a 360 degree coverage.

2007

发帖数: 1
33
安-24 所有事故:
1960s
1962
29 July 1962
A MAP Kiev MSZ An-24 (CCCP-46708) overran the runway at Sheremetyevo
Airport following an aborted takeoff.[1]
1965
20 March 1965
An Aeroflot An-24 (CCCP-46764) landed short of the runway at Khanty-
Mansiysk Airport, struck a snow drift and broke up, killing 43 of 47 on
board.[2]
1966
2 February 1966
A United Arab Airlines An-24 (SU-AOB) crashed at Luxor, Egypt during a
test flight.[3]
18 March 1966
United Arab Airlines Flight 749 crashed while a... 阅读全帖
w********2
发帖数: 632
34
来自主题: Military版 - 造不了60年前这款发动机
”The media typically reports that Blackbird flew around 80,000 feet. The
highest published altitude that I've ever seen is 96,000 feet. If the
Blackbird could stay comfortably higher than a MiG-25 in a zoom climb (
approx 37,000 meters, or 120,000 feet), it's operational altitude was much
higher than what's published.“
”I was talking to a retired Air Force radar operator a couple of months ago
. He said that he saw an SR-71 coming back from Asia, on his radarscope,
flying to Beale AFB (I believe... 阅读全帖
d*b
发帖数: 4453
35
来自主题: Military版 - 应该是媒体界对亚男的一种歧视
廊坊五毛懂个鸡巴毛美国! 难为你们不懂洋文,google不出来。 那我帮你一下好了。
美国这地方,不象你们廊坊,女的要给领导日,男的要把他妈给党委书记日才能上位。
在美国,只要你有本事,有能力,别说黑人当总统,就是亚裔小黄人照样凭当电视主
播。
Lia Chang: Fox 5 News NY (WNYW-TV) reporter Ti-Hua Chang Receives AAJA
National Journalism Award for story which explores Asian American Poverty in
New York
Lia Chang: Fox 5 News NY (WNYW-TV) reporter Ti-Hua Chang Receives AAJA
National Journalism Award for story which explores Asian American Poverty in
New York
Ti-Hua Chang
Kudos to Fox 5 News NY (WNYW-TV) reporter Ti-Hua C... 阅读全帖
g**1
发帖数: 10330
36
来自主题: Military版 - 比大陆老将说晚了
http://sputniknews.com/asia/201803231062835269-chinese-j20-not-undetectable-iaf/
Indian Air Force Claims China's J-20 Stealth Fighter Jets Are Not
Undetectable © REUTERS/ Stringer
ASIA & PACIFIC
21:21 23.03.2018(updated 21:22 23.03.2018) Get short URL92030
The J-20 stealth aircraft is a twin-engine, multi-role fighter that has an
exceptionally long range and can fly faster than 2,000 kilometers per hour.
It is said that its radar-scattering airframe is made up of radar-absorbing
materials t... 阅读全帖

发帖数: 1
37
来自主题: Military版 - 8防空弹,8管布拉莫斯
柴气联动,16管Barak-8防空弹,8管布拉莫斯,近防炮竟然还是用毛子老旧的AK-630M
Indian naval shipbuilder Mazagon Dock Shipbuilders Limited (MDSL) unveiled a
scale model of the Project 17A (P-17A) frigate at the Defexpo 2018
exhibition.
MDSL is building four ships in the class, while the remaining three are
being constructed by Garden Reach Shipbuilders & Engineers (GRSE).
The P-17A platform has been described as an enlarged, stealthier variant of
the three-ship Project 17 (P-17) Shivalik class frigates. The new ships are
149 m ... 阅读全帖

发帖数: 1
38
来自主题: Military版 - “Strategic
US Must Hustle On Hypersonics, EW, AI: VCJCS Selva & Work
By SYDNEY J. FREEDBERG JR. on June 21, 2018 at 3:52 PM
WASHINGTON: China is besting the United States in key military technologies
like hypersonic missiles and electronic warfare, Gen. Paul Selva, vice-
chairman of the Joint Chiefs said today. We can still catch up, he predicted
.
What about Artificial Intelligence? That’s too close to call, said former
deputy Defense Secretary Bob Work, so we’d better get a move on. Both men
spoke at a C... 阅读全帖
s*****r
发帖数: 11545
39
Probably radar has detected the aircraft but no one responded to it or
nothing can be done? in this case is the radar still the one to be blamed?


: 叙利亚只用俄罗斯制造的铠甲-S1防空飞弹保护

: 它,但以色列释出的作战画面中显示,防空飞弹"已经先被干掉了",因此"这锅
要俄铠

: 甲-S1来背",责任并不在中国身上。

: ------------------------------------------------

: 为什么不是中国雷达未能发现敌机,才导致铠甲先被干掉?

a******s
发帖数: 141
40
来自主题: Military2版 - E-2C到底卖了几个国家?
7 countries besides USA itself:
taiwan, Egypt, france, Isreal, Japan, Mexico, Singapore
check wiki http://en.wikipedia.org/wiki/E-2_Hawkeye
E-2C
As the E-2B but with all new electronics, surveillance radar and search
radar, 63 built. In "plus-models" the E-2C also has an upgraded power-plant.
E-2C Hawkeye 2000
It is a new upgrade version of E-2C.
E-2K
Similar to E-2C Hawkeye 2000. Republic of China (Taiwan) named it E-2K.
E-2T
E-2C variant for Republic of China (Taiwan).
Republic of China (T
T*****T
发帖数: 199
41
用的材料,航电不同, radar signiture自然也不同。 大家都知道F22的外形, 难道
就知道它的radar signiture 而容易探测了? 再说了, 有鸟飞15000米, M1.6吗?
估计土共的四代机现在也有个方案了。不出意料应该是基于J10的气动布局, 必竟这是
土共唯一有些新意, 有些心得的气动布局方案。 只不过如果土共十五年前打定山寨
YF23的主意,一门心思研发隐形材料和蝶尾的操控, 配上日渐成熟的雷达和导弹系统
, 现在估计都够美帝恶心一阵子的了。
w******n
发帖数: 13172
42
貌似几乎所有的跟帖都认可tg可以实现,都在讨论如何从政治上反制或用激光自卫。
http://www.usni.org/news-and-features/chinese-kill-weapon
Report: Chinese Develop Special "Kill Weapon" to Destroy U.S. Aircraft
Carriers
Advanced missile poses substantial new threat for U.S. Navy
U. S. Naval Institute
March 31, 2009
With tensions already rising due to the Chinese navy becoming more
aggressive in asserting its territorial claims in the South China Sea, the U
.S. Navy seems to have yet another reason to be deeply concerned.
After years of c... 阅读全帖
v**e
发帖数: 8422
43
简氏防务周刊:中国SD-10A空空捣蛋采用主/被动双模式制导,威力比原来预想的更加
强大(英文)
作者:huitong 发表日期:2010-11-29
Jane's Defence Weekly
China's SD-10 claimed to be a dual-mode AAM.
Robert Hewson Jane's Air-Launched Weapons Editor - Zhuhai, China
China's SD-10 medium-range air-to-air missile (AAM), as exhibited at Airshow
China earlier in November, may be a considerably more capable weapon than
was hitherto believed, Jane's understands.
Officials from the SD-10's manufacturer, the Luoyang Electro-Optical
Technology Development Center... 阅读全帖
w********r
发帖数: 14958
44
来自主题: Military2版 - F15也开始隐形了
这个应该是绝密。
但是USAF曾经公开过一点信息。
“Nov 2005: The U.S. Air Force, in it’s effort to get money to build more F
-22s, has revealed just how “stealthy” the F-22 is. It’s RCS (Radar Cross
Section) is the equivalent, for a radar, to a metal marble. The less
stealthy (and much cheaper) F-35, is equal to a metal golf ball. The F-35
stealthiness is a bit better than the B-2 bomber, which, in turn, was twice
as good as that on the even older F-117.”
其中,standard golf ball的直径是4.2672 cm. 算起来好像非常的小,真实性就不得而知了。
m********5
发帖数: 17667
45
你们老将忘文生义,太挫了
Passive Phased Array Radar,并不是说这个Radar是passive的,这是说这个Phased
array 是passive. 也就是说array只有天线单元,自己不产生功率。
无源相控阵自己不产生辐射,但是雷达必须要有辐射,因此PPA还是必须接驳雷达,有
一个单独的功率放大器,功率经过波导分配到阵列天线。
而有源阵是只阵列每个单独的单元自带功率发生器和接收器,因此不需要功率分配器。
由于这个多余的步骤导致无源阵雷达的电功率效率要比有源阵低,波束质量要比有源阵
低,电磁波有效功率也要比有源阵低。
至于谁的热量多,我倒是不知道,反正只要是阵列,不管有源无源其效率都比一般的雷
达低,发热量大。而无源阵效率更要低得多。
g**1
发帖数: 10330
46
Turkey asks U.S. to extend pricing on Raytheon missile bid -sources
http://www.reuters.com/article/2013/10/28/turkey-china-usa-idIN
By Andrea Shalal-Esa
WASHINGTON | Mon Oct 28, 2013 6:05pm EDT
Oct 28 (Reuters) - Turkey has asked the United States to extend the pricing
on Raytheon Co's Patriot missile defense system proposal, two sources
familiar with the discussions told Reuters on Monday, a sign that Ankara is
keeping its options open in case its talks with the preferred Chinese
supplier fall ... 阅读全帖
v**e
发帖数: 8422
47
印度大气层外拦截没成功,两者之间距离尚待计算
Interceptor spot on, though without blast: DRDO
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SHARE · COMMENT (6) · PRINT · T+
The DRDO test-fires the Prithvi Defence Vehicle interceptor missile from the
Wheeler Island, off the Odisha coast, on Sunday.
DRDOThe DRDO test-fires the Prithvi Defence Vehicle interceptor missile from
the Wheeler Isla... 阅读全帖
d**********0
发帖数: 13081
48
Boeing P-8I Neptune[edit]
A Boeing P-8I of the Indian Navy
New Delhi and Boeing have signed a $2.1 billion contract to deliver 12 P-8I
Neptune for anti-submarine operations. The new aircraft will replace a fleet
of Russian-manufactured Tupolev-142M planes. P-8I varies from the P-8A,
with the Magnetic anomaly detector (MAD) has been kept intact while an aft-
mounted radar provides 360-degree aerial radar surveillance capability. Many
of the communication and other devices on-board are developed b... 阅读全帖
p****s
发帖数: 3184
49
That formula (5) in the paper is based on Nimitz-class carrier with cross-
section area size 5000 square meters (333meter in length and 15meter in
height).
And the formula is a free-space point-to-point model. Your earth curvature
argument doesn't apply here.
And the other parameters used in the formula are all reasonable for an anti-
ship missile's warhead, e.g., 26dBi antenna and 50kw transmission power.
This leads to a reasonably practical radar maximal range of 20km, which is
the upper li... 阅读全帖
a***e
发帖数: 27968
50
these are pulse radar. peak power of 50KW means average below 5KW.
energy wise, a car battery should store enough energy for the terminal
homing.
most of the anti-ship long range missile with active terminal homing
operated by
battery at the end. typical size of radar like harpoon is less than 20cm in
size
and homing in 10nmile range.
RF amplifier efficiency is actually much higher than what you BS here.

50kW
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