Indian Military News, Reports, Data, etc.

Jeff Head

General
Registered Member
Why? It is very well known that active cancellation is far superior to any kind of passive measures.

There is someone called Gambit on PDF. He served in the USAF for 20+ years, primarily related to avionics and stealth. Even he says nothing trumps active cancellation. He was the one who said you can put an active cancellation system on any aircraft you want.
So, you are treating a screen name individual, that no one knows or can verify, who says he served in such and such in the USAF for twenty years...as your source for indicating that something is definitely true?

Sorry ABB, this simply punctuates the idea (once again) that a sourced, verifiable basis for your statement is non-existent.

I believe I had already mentioned that the people on SDF have no clue on what's happening elsewhere.

Okay ABB, ENOUGH of your taking such pot shots at SD and the people here.

You clearly do not like it here, you clearly feel you are superior to those here (despite being caught on several occasions in fantastic fabrications) , it is clear that you feel that the people (some of whom I personally know and who are extremely well qualified to be discussing these matters) "have no clue."

Fine, if that is how you feel, as evidenced by your posts...then it is you who do not belong here on SD.

Welcome to a four week suspension.

If at the end of that time you change your mind about SD, you can continue...if not, it will be permanent.

DO NOT RESPOND TO THIS MODERATION
 
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Jeff Head

General
Registered Member
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Kamorta.jpg

Naval Today said:
The Indian Navy concluded its annual Theatre Level Readiness and Operational Exercise (TROPEX) on 27 Feb 2015.

This month long war drill encompassed all dimensions of maritime warfare, and witnessed participation of around 50 ships and submarines, along with over 70 aircraft from the three Naval Commands, as well as units from the India Air Force and the Indian Coast Guard.

The area of operations spanned the Arabian Sea and Northern Indian Ocean and was aimed at validating the Indian Navy’s Concept of Operations.

During TROPEX-2015, the Navy had deployed two Carrier Task Forces simultaneously at sea, with both Viraat and Vikramaditya operating with their integral flights in an operational scenario. This assumes significance as it makes the Indian Navy, besides the US Navy, capable of deploying more than one Carrier Task Force at sea, at present.

TROPEX also saw extensive deployment of the nuclear submarine Chakra, the recently inducted P8I Long Range Maritime Reconnaissance aircraft, the recently commissioned guided missile destroyer Kolkata and Anti Submarine Warfare corvette Kamorta.

Impressive exercises by the Indian Navy.
 

aksha

Captain
Seeking the future: An interview with Dr G Satheesh Reddy, Director Research Centre Imarat
The brainchild of former President APJ Abdul Kalam, Research Centre Imarat is India's premier missile sub-systems laboratory. With a vast forested campus RCI is the jewel in DRDO's missile crown and is today an institution doing cutting edge research and development in missile guidance systems, control and actuation, onboard computing and even batteries. Moreover under the leadership of its current director Dr G Satheesh Reddy, RCI is graduating to full systems development for precision guided munitions (PGMs). Dr Reddy, a DRDO 'outstanding scientist', has numerous awards to his credit and is a leadinglight in the field of military navigation and sensing technology today. Geek at Large caught up with him in his RCI office...



SauravJha: Dr Reddy, do you feel that India's delivery capability is potent enough over ranges of 5000 kms or more, given that we presently lack a global navigation satellite system of our own and must rely on foreign constellations for updates to remove accumulated errors in the inertial navigation system (INS)?



Satheesh Reddy: Jamming or spoofing over the entire trajectory of 5-6000 km is not really a feasible proposition for anybody given the altitude and the orientation of the missile antenna. Moreover you would note that we are fielding systems that can receive multi-constellation updates. Receivers can also be designed to work in jamming conditions by employing things like null steering antennas. Yes it is possible that the signal itself may be turned off over a stretch approaching the target. Neverthelessthe ring laser gyroscope (RLG) based INS used in our long range missiles gives sufficient accuracy for credible strategic deterrence on its own under any circumstances.
ring-laser-gyroscope-based-.jpg

Fig 1: Ring Laser Gyroscope based INS + satellite receiver

SauravJha: Talking about tactical systems, what kind of optical gyroscopes are they using at the moment?



Satheesh Reddy: Fibre Optic Gyroscopes (FOG) mostly. Akash uses a FOG for example. In fact FOG technology is quite mature and FOGs arebeing produced in numbers. 200 FOGs for instance were recently delivered for the Akash program. FOGs are also being used for Tanks. We have FOGs of bias drift less than 0.01 degree per hourat the prototype stage currently. These are meant for ship based applications.



SauravJha: And what would you say about the state of RLG technology at RCI?



Satheesh Reddy: Well, it's 'state of the art'. World standard navigation grade RLGs are quite mature here.
new-mems-based-ins-with-sat.jpg

Fig 2: New MEMS based INS with satellite receiver

SauravJha: Where are these RLGs built?



Satheesh Reddy: They are built in and around the RCI campus.



SauravJha: Under a government owned company operated (GOCO) format?



Satheesh Reddy: Similar. Our first GOCO facility is actually the one that builds electrohydraulic servo valves.



SauravJha: Will the proposed new detector facility also be built on this campus?



Satheesh Reddy: No not here. In any case we aren't really being denied high accuracy focal point arrays (FPAs) nowadays.



SauravJha: Dr Reddy, the recently unveiled missile autonomy mission will see the development of tactical missiles that would clearly need seekers for the end game. In that context would you tell us more about the radio frequency (RF) seeker technology being developed here in RCI?



Satheesh Reddy: On the RF seeker front, we have quite a few developments taking place. We have developed a millimeter wave (MMW) seeker that is being produced by private industry. This MMW seeker is capable of both lock-on-after-launch(LOAL) and lock-on-before-launch(LOBL) configurations.

mmw-seeker.jpg

Fig 3: MMW seeker

SauravJha: What is the MMW seeker meant for?



Satheesh Reddy: It is meant for PGMs and for the next generation anti-radiation missile (NGARM).



SauravJha: PGMs of the kind?



Satheesh Reddy:Like the lightweight PGM under development here in RCI at the moment. This PGM has already been test-fired from an unmanned aerial vehicle and a sizeable number can also be carried by a missile like the Prithvi or by an aircraft like the Su-30 MKI. The Prithvi configuration can be used for attacking runways for example.



Continuing on the RF seeker front, RCI is also developing a Ku-band seeker for anti-aircraft applications. This is a scaled down version of an existing active radar seeker developed by us and is a requirement for the Astra. System qualification is expected to commenceearly next year.

An X-band seeker for anti-ship applications is also being pursued very seriously and trials will be held in the first quarter of 2015.



SauravJha:Turning to IIR seekers, Dr Reddy what is the status of the new seeker for the Nag? Will it satisfy the Army's requirement of achieving target acquisition at a range of 4 km even in the most trying desert conditions?



Satheesh Reddy:That seeker is headed for trials this year. It can actually be used out to 6-7 kmsin better conditions.

new-iir-seeker.jpg

Fig 4: New IIR seeker
auravJha: And has work begun on a two colour seeker?



Satheesh Reddy: Design work is under way. We expect it to head for developmental trials in 2016.



SauravJha: Dr Reddy, what is the state of atomic interferometry in India?



Satheesh Reddy: Work has started in Academic and Research institute s. The focus is currently on cold atoms etc.



SauravJha: Coming back to RF seekers, how would you characterize India's current manufacturing capability in this sphere?



Satheesh Reddy:There are at least 5-6 domestic companies now both private and public who are doing credible RF seeker work. With four of them right here in Hyderabad. BEL also has a very good RF practice. As I told you earlier the MMW seeker is already being produced by our companies.



SauravJha: And has work begun on a two colour seeker?



Satheesh Reddy: Design work is under way. We expect it to head for developmental trials in 2016.



SauravJha: Dr Reddy, what is the state of atomic interferometry in India?



Satheesh Reddy: Work has started in Academic and Research institute s. The focus is currently on cold atoms etc.



SauravJha: Coming back to RF seekers, how would you characterize India's current manufacturing capability in this sphere?



Satheesh Reddy:There are at least 5-6 domestic companies now both private and public who are doing credible RF seeker work. With four of them right here in Hyderabad. BEL also has a very good RF practice. As I told you earlier the MMW seeker is already being produced by our companies.
electro-mechanical-actuator.jpg

Fig 5: Electro-mechanical actuator (linear)
SauravJha:
Dr Reddy to wrap up, what are the kind of munitions expected to have system on chips for their onboard computing requirements?

Satheesh Reddy: Well, things like smart bombs.

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aksha

Captain
An interview with Captain S Ramaprasad (rtd), VSM, Indian Navy and Managing Director of Kaptron

To be dominant in the Indian Ocean Region (IOR), India must stay at the cutting edge of anti-submarine warfare capability which naturally continues to depend on the efficacy of underwater detection technology. Today we talk to Captain Ramaprasad, a front-ranking technologist in this domain who cut his teeth in the Indian Navy's Weapons, Electronic, Electrical Systems Engineering' (WEESE) Group at New Delhi and actually went on to develop the combat management system used in the INS Arihant today, an effort for which he received the Vishisht Seva Medal. Captain Ramaprasad's standout work from the past also includes inputs for DRDO's USHUS sonar which is being used in Indian submarines today. An M.Tech from IIT Kanpur, Captain Ramaprasad has declined numerous offers from foreign majors such as Lockheed Martin Librascope over the years to keep working on sonar technology in India. Through his company Kaptron, he continues to make critical contributions to India's submarine detection capabilities.



1. How did your company come to be? Tell us a bit about its origins?

This company was started by some retired naval officers in 1977. I took over this company in November 1998 after I retired from the Navy as a Project Director in WEESE.

While serving in the Navy some officers realised that the Indian Armed Forces have to depend on indigenous technologies sooner than later. Having served the Navy, they were motivated to serve India in a different manner - build indigenous technologies. Armed with the relevant domain knowledge and confidence in themselves, they were motivated to make this company. And I took over in 1998.



2. What are its current areas of work?

We are into sonar, radar and combat management systems. In fact, wherever there is a place for signal processing, probability & statistics; machine learning etc. - we are well-poised to create a positive impact. We develop algorithms, build models, simulate and evolve systems.



3. What technology has Kaptron developed in house?

We have successfully developed a sonar information processor (SIP) that uses sophisticated DSP and graphics. We have also modeled the ocean for sound propagation for predicting the performance of active and passive sonars.

We have developed radar cross section prediction software that can be further developed to build stealthy ships and aircraft. Our core strength is basically algorithm development for mathematically complex - real-time systems for the Armed Forces.



4. What is the potential of this technology?

We can significantly contribute towards upgrading several systems that the Navy is operating today. We can also help cut down development time for systems being created in India today.



5. Tell us a bit about some existing projects where your company has brought new capabilities to the table?

Most recently, the SIP from our stables has made it to serving submarines of the Indian Navy. The SIP incorporates technologies that foreigners might not be willing to sell to India. And this has been used to considerably improve the performance of the legacy Russian MGK-400 sonar on board Indian kilo class submarines in terms of both detection range as well as other aspects. This technology can be used for almost all other classes of sonars whether active or passive, whether hull mounted or towed or dunking. This can be used for sonobuoys also. In fact we are now working on improving a legacy medium frequency dunking sonar in service with the Navy.



6. How do you approach technology development in your company? What kind of human resources do you currently have for that?

Our work is obviously research-intensive, needless to say. All the engineers are selected very carefully. Some of them are from the IITs. In fact, our only strength is the brain power that we have nurtured - with great efforts and struggle. Moreover we also encourage our employees to keep pushing the bar as it were in terms of research and development. I personally encourage engineers in my company to work towards a doctoral thesis with a view to contributing to the existing pool of knowledge.



7. What are some of the challenges faced by companies like yours today?

Basic challenge is the opportunities available to us. While enormous opportunities exist, with India spending lakhs of crores on military equipment, hardly anything comes to us. Many procedures instituted by the Government are basically hostile to small companies like ours that want to do research activities. Instead of giving us professional challenges, we are offered every other type of challenge at multiple levels. At one point, I had to actually sell my house to keep this company running.



8. What kind of support do you think should be forthcoming on the policy front for companies like yours?

Fundamental support to specific R&D activities that could be harnessed for defence purposes, especially when credible technical capability has been demonstrated. Already we are a designated R&D partner for Bharat Electronics Limited for both sonar and radar systems.



9. What do you think are the key trends in sonar technology heading into the future?

Well, the sky is the limit for sonar technology. Today there are high frequency applications for which better resolutions are being sought. There are low frequency applications that promise superior range capability. Long range underwater communications, underwater and undersea explorations are just a few of the possibilities.
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Air Force Brat

Brigadier
Super Moderator
Not really. Stealth based on shaping is based on scattering signal in certain frequency band (usually X-band) , and to a lesser extent on absorbing said signal . You would not need to know exact pattern of EM signal for stealth based on shaping to work .
Very good Master Chief, a very accurate, succinct rebuttal of "smoke and mirrors". A+ Sir
That deep research and shaping defines adapting the science to achieve Stealth or Lo-Observables. That continues to be the F-22s strong suit to date, all others at this stage are wannabee's, the F-35 has taken a couple of steps back away from that cutting edge shaping in order to achieve most of the objectives and low-observability, in an affordable platform. The J-20, or FC-31 have a lot of shaping going on and may well be in F-35 territory or better, the designers of the PAK-FA when questioned about their apparent lack of attention to shaping explained that that they were going for an "aerodynamic advantage" and super-maneuverability, hence the exposed OVT nozzles, stealth shaping was moved to the back seat, not thrown out??
 

SamuraiBlue

Captain
Not really. Stealth based on shaping is based on scattering signal in certain frequency band (usually X-band) , and to a lesser extent on absorbing said signal . You would not need to know exact pattern of EM signal for stealth based on shaping to work .

Not precisely correct, it's not scattering the signal but deflecting the signal so a reflection does not return to the source (in which there will be an antenna which will listen in to the reflected signals).

Consider the panels of a plane as mirrors and the radar wave is a beam of light at night. If you shine the light but little/no reflection can be seen then that plane would be considered stealthy since you weren't able to see it against the dark background. Absorbing the signal is changing the Visible spectrum into infrared. Since you can't see infrared it won't register either which is exactly what the paint is doing since radar can't register infrared either. The frequency of a radar does have some influence since it's like changing a narrow beam into a broad flood light but there are other variables that changes with it which I won't go into.
 

aksha

Captain
maneuverability, hence the exposed OVT nozzles, stealth shaping was moved to the back seat, not thrown out??

i think the russians have found a way around that
img


found this in one of the russian forums
they say that this be the reason why their isn't flat nozzles on the PAK-FA.
Round nozzles that reduce IR-signature without getting rid of 3-D vectoring. but i do not know russian


are there anybody on this forum whocan translate
 

aksha

Captain
Largest ever acquisition in India's defence sector: Reliance Infrastructure acquires Pipavav Defence & Offshore.
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