http://www.raytheon.com/technology_toda ... 2010_2.pdfKailash wrote:Raytheon Working on Tiny AESA Radars[/url]
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A DRDO official attached to its HQ in New Delhi says that the payload for the Aerostat was taken from India’s Nishant UAV for technology demonstration. “We are working on independent systems and payloads for the Aerostat, but our mission was to prove the effectiveness of these platforms and our capabilities. We are now confident that the platforms can take the actual payload and beam output through various sensors,” the official said.Aviation aficionadas will get an upclose of the home-grown Aerostat during the 2011 Aero India.
AIZWAL: The Indian Air Force (IAF) will set up an air defence radar station (ADRS) in Mizoram bordering Myanmar and Bangladesh, an official release said here Wednesday.
"The ADRS would be set up at Zopuitlang in Lunglei district in southern Mizoram, for which 300 acres of land has been identified jointly by the IAF and the civil administration of the Mizoram government," the release said.
The Eastern Air Command chief, Air Marshal KK Nohwar Wednesday held a meeting with Mizoram governor Lt Gen (retd) MM Lakhera and discussed the matter. Land, revenue and settlement commissioner RL Rinawma was also present at the meeting.
"Nohwar has also sought land for setting up of a base station for the IAF aircraft at Lengpui airport in Mamit district in western Mizoram," it added.
The mountainous northeastern state of Mizoram shares a 404-km international border with Myanmar and 318-km border with Bangladesh.
Nohwar has asked Lakhera to assist the Mizoram government in organising an international festival on life, culture and traditional customs of different ethnic societies.
The senior IAF official said that a state-of-the-art fully equipped archery range of international standard is being set up by his command headquarter at Meghalaya capital Shillong.
Oldish newschackojoseph wrote:
CABS AEW ASEA Radar
The LRDE was roundly criticised for not successfully developing, in collaboration with Hindustan Aeronautics Limited, the multi-mode radar for the Light Combat Aircraft Tejas. But the Israeli radar now being fitted on the Tejas has an antenna designed by the LRDE – the slotted waveguide array antenna. The LRDE is also undertaking the design and development of the active electronically scanned array (AESA) technology. The AESA technology allows ships and aircraft to broadcast powerful radar signals while they themselves remain under stealth. The AESA’s basic building block is the TR module, a self-contained, miniaturised transmitter and receiver that makes up one of the AESA antenna elements. In a bid to develop the AESA, the LRDE has developed L and S band TR modules.
According to B.V. Ramesh, project director of LRDE’s LSTAR programme, an LRDE-developed X-band AESA radar could be fitted on the Tejas by 2014. Two modules of the AESA radar have already been launched. Ramesh also disclosed that the LSTAR (Long-range Solid State Active Phase Array Radar), which is a sort of a forerunner to India’s Airborne Early Warning and Control System programme, has been approved by the Centre for Military Airworthiness and Certification, integrated and tested on ground-based systems, and qualified for airborne applications. And a production agency, Astra Microwave, has been identified for it.
Among the LRDE’s foremost products is Indra-1, a radar that works on the Doppler principle. It has a 50-km range and is integrated with the fire control radar. It is in deployment with the Army and the Indian Air Force (IAF) as part of their air defence network. Indira-2, an improvement over Indira-1, was designed as per the needs of the IAF, which wanted a radar that can identify dense-formation targets, such as a group of aircraft flying wing tip to wing tip, and can be used even at high altitudes.
maitya wrote:Hmmm ... interesting choice of words there - "demonstration"Under the newly formed cluster of Micro-Electronics and Devices, the achievements include demonstration of the functioning of Gallium Nitride high-electron mobility transistor
Wonder if we are any closer to mass-manufacturing this puppy, if at all!!
Added later: The above is wrt the following quote in Tech Focus'08 around 3 yrs back:Development of material and device technology of AlGaN/GaN-based HEMT has been started in DRDO for the next generation technology for high frequency, high temperature and high power operation. GaN transistors will meet many strategic needs of DRDO applications in transmitter-receiver modules needed for phased array radars, EW, jammers, data links, communication, missile seeker heads, power transistors, to name a few.
Source: Tech Focus - 2008
Edinburgh - SELEX Galileo, a Finmeccanica Company, is proud to announce a new contract for its PicoSAR AESA surveillance radar. The contract will see 3 PicoSAR radars sold to a non-NATO export customeras evaluation models, with the potential for a full production run upon successful tests.
PicoSAR will be integrated into the customer's lightweight, tactical Unmanned Aerial System (UAS).
01 January, 1998
Stealth aircraft achieves 94% radar invisibility
Rakshit Sonawane
NASHIK, December 31: The Defence Research and Development Organisation (DRDO) and the Indian Air Force (IAF) jointly experimenting with the development of a Stealth aircraft, have achieved 94 per cent of radar invisibility.
According to Squadron Leader K P Gawd (from 7 Base Repair Dept, Air Force Station, Tughlakabad), who presented a paper on "Steps towards fabrication of an invisible aircraft" at the 13th National Convention of Aerospace Engineers held at the Hindustan Aeronautics Ltd (HAL) complex at Ojhar, a breakthrough had been achieved during experiments involving two scale models of an aircraft. According to Squadron Leader Gewd, Time Domain and Frequency Domain methods were used in addition to the two antenna method to determine radar invisibility and a 94 per cent invisibility was achieved. Efforts are being made to reduce the Radar Cross Section (RCS) signature of the aircraft to reduce detection by an enemy radar. The process is to coat an object with radar absorbing materials, which absorb energy from electromagnetic fields passing through them. Such materials have complex indices of refraction, which include magnetic and electric effects. There are two kinds of such materials-narrow band absorbers and broad bad absorbers. Besides, body shaping, impedance leading and chiroshield play a crucial role in fabricating an invisible aircraft. The DRDO and the IAF used an absorber having electromagnetic properties in KU band, following the two antenna method (spectrum Analyser) the time domain method and the frequency domain method. The drawbacks experienced were the RCS isolation error and the frequency response error. The former was caused by leakage between the antenna while the latter by non ideal frequency response of the cables, connectors, couplers and antennas. The errors were subsequently rectified and zero reflection for all frequencies achieved.
The development of an invisible aircraft is being done on the lines of the B 2 Stealth Bomber of the United States Air Force. Experts believe thatit is possible to make retroreflectors such as ship and submarines invisible to sonars.
Copyright © 1998 Indian Express Newspapers (Bombay) Ltd.
http://www.indianexpress.com/old/ie/dai ... 50614.html
Scientists develop stealth tech
Prithvijit Mitra, , Mar 26, 2006, 10.51am IST
KOLKATA: India could soon be the third country in the world, after the US and France, to have a stealth bomber fighter aircraft in its armoury.
The Kolkata-based Indian Association for Cultivation of Science (IACS) has developed a technology to convert ordinary light combat aircraft into stealth jets that would go undetected on radar. The first stage of the experiment, which commenced in 1999, has been successfully concluded. The defence ministry has approved the technology and has given the go-ahead for "full-scale production" to begin. It is expected to start in about six months' time.
http://articles.timesofindia.indiatimes ... scientists
Aerostats are good for peace-time surveillance, but would be vulnerable in a war.VKalukhe wrote:just taking it further.
Radar transmitters can be located on Satellites or Aerostats; equally receivers also can be placed on different Satellites or Aerostats or can have Aircrafts receiving the singles passively. However this would require strong integration between the different transmitters and receivers down to data links of SAM and AA missiles..
Cost of electronics can be driven down by mass production. Since one can get a pick up truck for say 5 lakhs, an illuminator system need not cost more than 10 or 15 lakh, if produced in bulk. Decoys may be cheaper. The truck engine can do double duty as a generator. For a thousand illuminators, you will spend about US $35 million.manjgu wrote:and Pranav will take care of these hundreds/thousand illuminators and also drive all the hundred/thousands pick up trucks and also pay for them. Good luck.. pranav bhai driver ki naukri de dena... lagta hai hamari company me downsizing ho rahi hai.
Availability of electrical power is the main constraint. Take Mahindra Scorpio for example, it churns out 120 bhp or ~ 90 KW @ 4000 rpm. Now even if one implements acquisition radars, fire control radars, command/control/communication nodes on other vehicles, this 90 KW is too low to power anything significant + definitely won't provide enough space to house everything. What we are looking here is a SAM system which is way inferior to point defence SAMs like Tor. Better/cheaper/simpler solution is to provide MANPADS to people lurking around in those pick ups.Pranav wrote:Cost of electronics can be driven down by mass production. Since one can get a pick up truck for say 5 lakhs, an illuminator system need not cost more than 10 or 15 lakh, if produced in bulk. Decoys may be cheaper. The truck engine can do double duty as a generator. For a thousand illuminators, you will spend about US $35 million.manjgu wrote:and Pranav will take care of these hundreds/thousand illuminators and also drive all the hundred/thousands pick up trucks and also pay for them. Good luck.. pranav bhai driver ki naukri de dena... lagta hai hamari company me downsizing ho rahi hai.
As mentioned earlier, illuminators are separated from radar receivers and interceptors. It is the illuminators which are vulnerable. The number of receivers and interceptors remain the same.manjgu wrote:ok.. now we have a new variation.. these thousands of trucks will have trained drivers ( who will all be trained to fire Igla;s..) and they will be darting around the countryside looking for hostile aircrafts and then stopping their pick up trucks and then quickly aiming their iglas and shooting down PAF ..( this is what i call Shoot and Scoot). and these thousands of drivers will be trained in Igla shooting at Pranava and neeraj b's kitchen garden.. these thousands of trainee shooters will practice Igla shooting by fixing Diwali rockets ( longest ones ..Cock brand from Sri Murugan ) and honing their skills.
manjgu wrote:ok.. now we have a new variation.. these thousands of trucks will have trained drivers ( who will all be trained to fire Igla;s..) and they will be darting around the countryside looking for hostile aircrafts and then stopping their pick up trucks and then quickly aiming their iglas and shooting down PAF ..( this is what i call Shoot and Scoot). and these thousands of drivers will be trained in Igla shooting at Pranava and neeraj b's kitchen garden.. these thousands of trainee shooters will practice Igla shooting by fixing Diwali rockets ( longest ones ..Cock brand from Sri Murugan ) and honing their skills.
I am talking about illuminator functionality alone. One needs high redundancy, decoys etc for the illuminators, because they are vulnerable to anti-radiation munitions.neerajb wrote: Availability of electrical power is the main constraint. Take Mahindra Scorpio for example, it churns out 120 bhp or ~ 90 KW @ 4000 rpm. Now even if one implements acquisition radars, fire control radars, command/control/communication nodes on other vehicles, this 90 KW is too low to power anything significant + definitely won't provide enough space to house everything. What we are looking here is a SAM system which is way inferior to point defence SAMs like Tor. Better/cheaper/simpler solution is to provide MANPADS to people lurking around in those pick ups.
Cheers....
Manjgu Bhai, when you are in a weak scenario, improvisation and cleaver thinking can still win objectives and battles. In the 70's Military Intelligence used to feed wrong locations/coordinates of airbases, fuel / ammo dumps etc to the Paki spies - when war actually started, PAF mostly only bombed these dummy locations and as a result many of our air bases were not hit. Similarly, there any many many examples of decoys being used to our advantage. During Pokhran 2, nukes were transported in apple carts and exploded under the noses of the smarting western world. We have used our transport aircraft for bombing, used jetpacks on transports to land / take off from Laddakh.....Many people laughed at these ideas during the planning stages.manjgu wrote:ok.. now we have a new variation.. these thousands of trucks will have trained drivers ( who will all be trained to fire Igla;s..) and they will be darting around the countryside looking for hostile aircrafts and then stopping their pick up trucks and then quickly aiming their iglas and shooting down PAF ..( this is what i call Shoot and Scoot). and these thousands of drivers will be trained in Igla shooting at Pranava and neeraj b's kitchen garden.. these thousands of trainee shooters will practice Igla shooting by fixing Diwali rockets ( longest ones ..Cock brand from Sri Murugan ) and honing their skills.
Northrop Grumman Corporation has set a new standard for its GaN-based high power transmit/receive (T/R) modules by reliably operating them for more than 180 days
In a rigorous evaluation conducted by the company's Advanced Concepts and Technology Division, the T/R modules were tested by using high-stressing operational long-pulse waveforms, which operated on the modules nonstop for more than six months. These waveforms were designed to simulate the electronic activities of actual radar functions, in a relevant environment allowing Northrop Grumman engineers to understand how well they would perform in tactical operation.
The successful tests prove that the next generation of active electronically scanned arrays (AESA) is capable of reliable operation while producing much greater radar sensitivity, at higher efficiency and lower cost. With this new threshold established, the T/R modules can serve as critical technology elements for a wide range of future applications.
We are adding more Phalcons as well as Aerostats... these along with LRTR, MPR etc would beef up our AD Network. As more and more Akash Squadrons come online, we can worry less about PAF and No Dungs.India is also moving towards procuring nine more Aerostat radars to add to the two EL/M-2083 Israeli Aerostats inducted earlier as well as two additional AWACS (airborne warning and control systems) to supplement the first three Israeli Phalcon AWACS bought under a $1.1-billion deal.
andy B wrote:^^^ from above link: Arudhra looks pretty darn TFTA to me...nice work LRDE. I highly doubt that this would have lots of Yehudi components given the time LRDE has spent developing out own techs. in this regard.
Cause for some salwar shivers. 
We don't know if it is static in one place or movable, The SA-2 /SA-3 Radars I have seen on IAF bases are tow capable to be moved couple of hundred meters. This part has been cleverly obscured by the horde of IAF men and women posing before that. my new wallpaper!!!Singha wrote:my only nitpick is it could have been mounted on a trailer thats pulled by a truck up that ramp and left in place - for making a quick relocation in times of war...the truck comes back and pulls the trailer to another site.
here it looks to be bolted onto that raised platform.
