ABM/Missile Defense Discussion

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Arun_S
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Post by Arun_S »

SaiK wrote:
Q: How is the exo and eno defined in terms of BD? in the sense, is it based on the effect of nuclear fallout or based on certain sphere distance above earth surface?
Exo is when missile intercepted at higher reachesof rarified atmosphere. It is characterized by taget presenting itself as very bright and high contrast thermal energy source. The target is not encountering any significant aerodynamic drag/lift, and can still do some last minute manuvere. On geek terms it is on Maximum-Q (thermal/tempratire).

Interceptor also does not get any aerodynamic leverage fo rmanuver, must use perpendicularly oriented diver thusters. Interceptor uses optical/IR telescope as one of the seeker.

Endo is when missile is entering very high physical drag and aerodynamic forces (Max-Q force). The interceptor can't use IR seeker, and itself is capable of hard aerodynamic manuvers. Prepare to see fins on on the front and flex nozzle engine. Unlikely to use divertor.
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Post by svinayak »

Singha wrote:http://www.fas.org/nuke/guide/china/nuke/index.html

lizard really has a pitiful force of 20 CSS-5 mod2 land based weapons
to threaten unkil with but if you see the respect and space accorded to
it, looks like 7000 SS-18 on hot standby.

thats the power of trade and deftly weakening the US elites from within.
It is a deliberate policy of Unkil to give respect and space since China has helped Uncle's policy to contain many countries in the world including Russia and India.
This is a mutual symbiotic relationship
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Post by Arun_S »

Acharya wrote: It is a deliberate policy of Unkil to give respect and space since China has helped Uncle's policy to contain many countries in the world including Russia and India.
This is a mutual symbiotic relationship
Very true.
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Post by Raman »

Arun_S saar,

Please correct me if I'm wrong, but I thought that Maximum-Q is a specific point in a flight profile in which Q (dynamic pressure; 0.5*rho*V^2) is at its maximum value during the trade off between low velocity and high density at launch and high velocity but low density at altitude.

The exo-atmospheric intercept cannot be anywhere near maximum Q. e.g., the space shuttle reaches maximum Q at a paltry 35k feet. As you've indicated, the target is not encountering any significant aerodynamic lift or drag --- rho is almost zero so Q must be extremely low too.
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Post by Arun_S »

Raman: There are two Max-Q (temp and pressure) that occur at different altitudes. However Max-Q dynamic pressure is more lethal thus more often discussed. Correct me if I am wrong, I am always willing to learn.
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Post by Raman »

Arun_S,

I'm only aware of Q as dynamic pressure. I've not been able to find a reference of Q being related to temp e.g., link (and others like it). (But my knowledge of aerodynamics is fairly elementary, so I don't claim any sort of authority on this.)
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Post by Raj Malhotra »

Arun_S wrote:
Raj Malhotra wrote:Using some info given by Arun, my guess would be Single Stage, 21-25inch dia, 3500kg missile with ARH, datalinks and Kinetic Kill warhead with back up explosive warhead of around 100-250kg. It will also have long range anti-aircraft role capable of bring down fighter aircraft at 100-150km range and low g transport-AWACS aircraft upto 200-250km range
Yes a very high probability that the interceptor will be 0.75m diameter and 8.5m (6m + 2.5m) long.

For payload of 400Kg. Its burnout velocity is 2.7Km/sec
Large Size Solid Booster-- DRDO has developed a state-of-the-art case-bonded HTPB-based composite propellant with low burn rate of 4.3 mm/s at 50 KSC. This solid propellant rocket motor (dia 740/620 mm, length 6 m), made of 250 grade maraging steel, consists of a composite nozzle with metallic backup and lined with carbon phenolic liners. The motor is capable of generating 16 ton thrust for 38 s duration.
[/size]
Re Arun

Incidentally are you still of the same opinion regarding Prithvi solid fueled =?Sagriaka=?Dhanush-2. Do you feel that the missile could be heavier with composite material casing, no fins. light weight strategic payload etc to give a better range, say of 600-800km. After all it is possible that Agni-3 and this SRBM are of same genre of technology??

To add to speculation, even if Agni-3 unloads say 6-12 fission bombs of 10kt yield (assuming device weight of 100kg) it would be city killer. I am saying this on the basis that my personal feel is that India has only two types of nukes 10 kt fission device whose weight has progressively gone down from 600kg to 250kg to 100kg - and - fusion device whose weight is 300kg and may go down to 150kg over a period of time.
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Post by JaiS »

Lockheed Martin Aegis Ballistic Missile Defense Weapon System
Simultaneously Engages Two Threats During Multi-Mission Test


During a test today, Lockheed Martin's [NYSE: LMT] Aegis Ballistic Missile Defense (BMD) Weapon System proved its multi-mission capability by simultaneously engaging two targets - a ballistic missile and an anti-ship cruise missile - in the Pacific Ocean off the coast of Hawaii.

The test represents the Aegis system's eighth successful ballistic missile intercept in 10 attempts, and the first intercept while simultaneously engaging an air threat. In addition to its record of intercepts, Aegis BMD has successfully supported more than 15 ballistic missile defense system tracking tests since June 2004.

In today's test, USS Lake Erie (CG 70), a guided missile cruiser equipped with the latest U.S. Navy and Missile Defense Agency (MDA)-certified version of the Aegis BMD Weapon System (Aegis BMD 3.6 Weapons System), successfully detected, tracked, targeted, and guided two Standard Missiles (SM) to the targets. Aegis guided an SM-3 Block IA missile to its successful intercept of a short-range, non-separating ballistic missile target outside the Earth's atmosphere. Aegis also guided an SM-2 Block IIIA missile successfully to a low-altitude intercept of a cruise missile target, as planned.
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Post by shyamd »

Vick wrote:Milestone in Missile Defence

Sorry for the inline image...
Image
Image
Image
Image
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Post by Vick »

shyamd, thanks for tacking on one more image, I forgot that one on the cover.
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Post by Ankit Desai »

Awesome pics shyamd , appreciate ur work .
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Post by vinayak_d »

Does PAD really require the fins? I though they were only required for lift to increase range over a completely ballistic trajectory.
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Post by mandrake »

vinayak_dangui wrote:Does PAD really require the fins? I though they were only required for lift to increase range over a completely ballistic trajectory.
yes it would require fin in its second stage for manuverality?

anyways the fins are placed in the middle, where is the second stage seperation happens then?
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Post by Kumar »

I don't think Prithvi shown in the images was the interceptor. It was the target. The report is talking about the second stage of the interceptor. Prithvi is single stage liquid fueled. AFAIK the interceptor was solid-fueled.

The images don't show the interceptor or the interception.
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Post by shyamd »

Thanks Vick and Ankit Desai.

Well, looking at the pics, Is it just me or is the first pic a different colour to the others? Look at the last stage, it is white, while the others are grey.
Last edited by shyamd on 04 May 2007 05:51, edited 1 time in total.
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Post by Suraj »

On the first picture, the Prithvi missile has 'TGT 02' printed on the fuselage. So it would indeed appear that this was the target, not the interceptor. The last pic appears to indicate the other side of the fuselage has 'PAD 02' stencilled on it. We've heard some folks talking about how the test last year was not the first. Maybe the 02 indicates as much...
Last edited by Suraj on 04 May 2007 05:50, edited 1 time in total.
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Post by ParGha »

Kumar wrote:I don't think Prithvi shown in the images was the interceptor. It was the target. The report is talking about the second stage of the interceptor. Prithvi is single stage liquid fueled. AFAIK the interceptor was solid-fueled.

The images don't show the interceptor or the interception.
The "TGT" above "DRDO" is "target"?
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Post by ParGha »

Suraj wrote:On the first picture, the Prithvi missile has 'TGT 02' printed on the fuselage. So it would indeed appear that this was the target, not the interceptor. The last pic appears to indicate the other side of the fuselage has 'PAD 02' stencilled on it. We've heard some folks talking about how the test last year was not the first. Maybe the 02 indicates as much...
Ah! You beat me to it...
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Post by Kumar »

Suraj wrote:On the first picture, the Prithvi missile has 'TGT 02' printed on the fuselage. So it would indeed appear that this was the target, not the interceptor. The last pic appears to indicate the other side of the fuselage has 'PAD 02' stencilled on it. We've heard some folks talking about how the test last year was not the first. Maybe the 02 indicates as much...
The article linked by Vick
http://mod.nic.in/samachar/dec15-06/h1.htm#l1
mentions two test dates Nov 19 and Nov 27 2006.

Apparently the interception test was done only on Nov 27th. The target-03 was tested before target-02.

What happened or is going to happen to target-01?
To evaluate the integrated functionality for weapon system elements and software, AD Target-03 was test fired successfully from launch complex No-3 (LC III), Integrated Test Range (ITR), Chandipur on November 19 at 09:55 hours.
...
On November 27, at 10:15 hours, Air Defence Target-02 was launched from LC III. The Weapon System Radars picked up the target at 3 km altitude, MCC gave target assignment to LCC, Ground Guidance Computed the Initial Azimuth, time of launch of PAD and uploaded to On-board computer and the PAD interceptor lifted off when the Target was at Apogee and onboard guidance steered the interceptor towards target. The on-board seeker acquired the target, the stage separation and second stage motor ignition events happened as planned. The Terminal Guidance and Control performed flawlessly. All the mission events took place as expected. The PAD intercepted the Target successfully at an altitude of 50 km.
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Post by shyamd »

Taken from DSJ
Missile Defence and Interceptor Allocation by LVQ-RBF Multi-agent Hybrid Architecture
Thamarai Selvi S, Malmathanraj R
Abstract

This paper proposes a solution methodology for a missile defence problem using theatre missile defence (TMD) concept. In the missile defence scenario, the concept of TMD is generally used for the optimal allocation of interceptors to counter the attack missiles. The problem is computationally complex due to the presence of enormous state space. The Learning vector quantiser–Radial basis function (LVQ-RBF) multi-agent hybrid neural architecture is used as the learning structure, and Q-learning as the learning method. The LVQ-RBF multi-agent hybrid neural architecture overcomes the complex state space issue using the partitioning and weighted learning approach. The proposed LVQ-RBF multi- agent hybrid architecture improvises the learning performance by the local and global error criterion. The state space is explored with initial coarse partitioning by LVQ neural network. The fine partitioning of the state space is performed using the multi-agent RBF neural network. The discrete reward scheme is used for LVQ-RBF multi-agent hybrid neural architecture. It has a hierarchical architecture which enables quicker convergence without the loss of accuracy. The simulation of the TMD is performed with 500 assets and six priority of assets.
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Post by Aditya G »

The photos are of different launches. The last one is not launched from TEL vehicle unlike 1-3.
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Post by shyamd »

Apologies if already posted
Video of the PAD launch from IBN
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Post by Aditya G »

Animation or actual?

Image
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Post by mandrake »

^^ :D Mate thats Saheen 2.
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Post by SaiK »


America thwarted


Vladimir Radyuhin

Russia's test last week of two missiles shatters Washington's dreams of nuclear supremacy.

IT MAY prove to be Washington's biggest strategic miscalculation in decades. Its assessment of Russian defence capabilities was blasted to pieces last week when the latter tested two new missiles.

In one of the tests, a new long-range nuclear-capable missile armed with multiple warheads launched from the cosmodrome in Plisetsk successfully hit targets on the Kamchatka Peninsula thousands of miles away. On the same day Russia test-fired a high-precision tactical cruise missile.

All U.S. defence planning since the break-up of the Soviet Union was based on the assumption that Russia would never regain its military strength. This opened the way for the U.S. to attain decisive strategic superiority.

The Bush administration in 2001 unilaterally abrogated the U.S.-Russian Anti-Ballistic Missile (ABM) Treaty, which for 30 years acted as a deterrent to nuclear conflict. It stood in the way of U.S. plans to build a national missile shield that would give it immunity from a Russian missile attack and tip the strategic balance in Washington's favour.

The U.S. revived the Star Wars programme of the Ronald Reagan administration, which had been shelved because it was deemed incapable of intercepting the thousands of warheads the Soviet Union could launch either in a hypothetical first strike or in retaliation for a U.S. attack. However, with the Russian missile arsenals rapidly shrinking, the "Son of the Star Wars," as the new programme was dubbed, stood a good chance of coping with the task, U.S strategists argued.

Many Russian experts offered similar assessments. The Moscow-based AST think tank estimated that at the current rate of re-armament Russia would have just 400-500 nuclear warheads by 2020, half of which the U.S. global missile system would be able to intercept even if they survived a U.S. first strike. This was one reason why Washington said it was not interested in any new arms control pacts with Moscow after the expiry of the 2002 Treaty on the Reduction of Strategic Nuclear Arsenals, which called on both nations to cut their deployed warheads to between 1,700 and 2,200 deployed warheads by 2012.

Missiles in eastern Europe

In 2004, the U.S. began to deploy missile interceptors in Alaska and California. Earlier this year it announced plans to station some missiles in Poland. Washington insists its missile shield is not directed against Russia and is intended to defend against threats from "rogue states" such as North Korea and Iran. Russia does not buy this explanation. It regards the U.S. missile defence plans as a direct threat to its nuclear deterrent.

As a top Pentagon missile-defence official put it, the U.S. missile shield is "the missing link to a first strike." In other words, it would be valuable primarily as an offensive, not a defensive weapon — as an adjunct to a U.S. first-strike capability. This is not to say that the U.S. plans to launch a nuclear attack on Russia. But nuclear superiority would enable Washington to dictate to Moscow.

President Vladimir Putin promised in February a "highly effective response" to any U.S. efforts to deploy missile defences. The response has come earlier than anyone expected.

The new long-range missile, RS-24, test-fired last week carries six nuclear warheads that can manoeuvre in the final stages of the flight to evade any missile defences. It will serve as the main land component of the country's strategic nuclear triad until the middle of this century, Russia's Defence Ministry said in a statement.

The RS-24 will replace Soviet-era RS-18 (Stiletto) and RS-20 (Satan) heavy multi-warhead intercontinental missiles, which today make up the backbone of the Russian nuclear forces, but will have to be decommissioned by 2015-2017, when they reach the end of their service life. All Soviet heavy missiles were manufactured in Ukraine, and after the break-up of the Soviet Union it was widely assumed that Russia would not be able to build such missiles anymore.

The induction of the multi-warhead mobile RS-24 will vastly improve Russia's ability to replenish its nuclear stockpile. Until now Moscow has been building only single-warhead Topol-M missiles at a rate of six to 10 missiles a year, which could not compensate for the decommissioning of multi-warhead missiles. A similar number of RS-24 missiles will add six times more warheads to the country's nuclear inventory.

The test-firing of the RS-24 led to a radical reassessment of Russia's future nuclear potential. Defence experts now predict that by 2015 Russia will have about 2,000 independently targeted nuclear warheads mounted on mobile launchers and capable of busting any missile shield the U.S. might build.

In another big surprise, Russia last week successfully tested a new mobile short-range missile that can knock out missile interceptors the U.S. plans to deploy in Eastern Europe and other regions along Russia's borders. The Iskander-M cruise missile can skim the ground evading air defences and hit targets with a 2-metre precision. Its declared range is less than 500 km in accordance with a Soviet-U.S. pact banning medium-range missiles, but experts said it could easily be increased to 1,000 km or more. Russia had recently declared its intention to pull out of the treaty.

President Vladimir Putin said the new missile tests were part of efforts to "maintain strategic balance of forces," while First Deputy Prime Minister Sergei Ivanov, responsible for national defence, declared that "Russians can look calmly to the country's future in terms of defence and security."

It looks like the U.S. goal of achieving nuclear primacy could remain a pipe dream.
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Post by JaiS »

Lockheed Martin Aegis Ballistic Missile Defense System Successfully Destroys Medium-Range Separating Ballistic Missile During Test

KAUAI, Hawaii, June 22 /PRNewswire-FirstCall/ -- During a test today, Lockheed Martin's Aegis Ballistic Missile Defense (BMD) System intercepted and destroyed a separating ballistic missile target during its midcourse phase of flight.

The test represents the Aegis BMD system's ninth successful ballistic missile intercept in 11 attempts and is the first ballistic missile intercept conducted by an Aegis BMD destroyer. This also marks the third time the Aegis BMD system has demonstrated its target discrimination capabilities by intercepting a ballistic missile with a separating reentry vehicle. In addition to its record of intercepts, Aegis BMD has successfully supported more than 15 ballistic missile defense system tracking tests since June 2004.

In today's test, USS Decatur (DDG 73), an Aegis BMD destroyer equipped with the latest U.S. Navy certified version of the Aegis BMD Weapon System (Aegis BMD 3.6), successfully guided a Standard Missile (SM)-3 Block IA missile to intercept a medium range, separating ballistic missile target outside the Earth's atmosphere.

During the test, USS Port Royal used its SPY-1B radar augmented by a prototype Aegis BMD Signal Processor (BSP) to detect and track the separating warhead in real time, and to differentiate -- or discriminate -- the simulated warhead from the rest of the missile. The BSP's success further validated the readiness of this advanced discrimination capability against complex threats for installation and deployment as part of the next configuration of Aegis BMD capability beginning in 2010.

The flight mission was the final event of a series of tests conducted in the days preceding today's successful intercept. In the previous events, USS Decatur verified Aegis BMD 3.6's performance in detecting, tracking and targeting a high altitude, anti-radiation missile target, demonstrating the system's multi-mission capability and conducted simultaneous, simulated engagements against two ballistic missile targets launched from the Pacific Missile Range Facility. During the same event, THAAD cued USS Port Royal, and the ship's SPY-1B(V) radar augmented by BSP then acquired and tracked the ballistic missile targets.

The Aegis BMD 3.6 Weapon System, including the SM-3 Block IA missile, was certified for operational deployment by the U.S. Navy in August 2006. Aegis BMD 3.6 enhances the ballistic missile defense capabilities of the current Aegis BMD fleet and adds capability in other warfare areas -- as demonstrated in today's test.
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Post by JaiS »

Raytheon Awarded $304 Million for Ballistic Missile Defense System Upgrades

TEWKSBURY, Mass. --- The Missile Defense Agency has awarded Raytheon Company a $304 million contract to develop advanced tracking and discrimination capabilities for the Ballistic Missile Defense System (BMDS) forward based AN/TPY-2 radar.

Under the contract, Raytheon is responsible for the development and test of radar software, various engineering tasks, maintenance and support, infrastructure upgrades and deployment mission planning.

Raytheon IDS designed and built the AN/TPY-2 radar drawing on extensive sensor knowledge from its X-Band "Family of Radars." A high-power, transportable X-Band radar, the AN/TPY-2 is designed to detect, track and discriminate ballistic missile threats. It maximizes the capability of the BMDS to identify, assess and engage threats to the U.S., deployed forces and allies.

As the prime contractor for this program, Raytheon IDS has delivered the first two of five planned AN/TPY-2 radars to the Missile Defense Agency. The first radar, delivered in November 2004, is currently deployed in Japan. It is the first new Missile Defense Agency system to be developed and deployed as an operational asset outside the U.S. The second AN/TPY-2 radar recently completed acceptance testing at Vandenberg Air Force Base, Calif. Raytheon is also responsible for whole-life engineering support for AN/TPY-2 radars under a contract awarded in June 2005.
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Post by JaiS »

Airborne Laser Completes Successful Fire Control Loop for Missile Engagement Sequence

The Missile Defense Agency announced today the successful completion of the basic steps required to complete a fire control loop (sequence of events) to engage a boosting ballistic missile for the Airborne Laser (ABL) aircraft during flight tests conducted on June 29, 2007.

The exercise included the first in-flight propagation of the Surrogate High Energy Laser (SHEL) through the nose-mounted turret of the ABL aircraft, a boost-phase missile defense system that is designed to use directed energy to destroy a ballistic missile in the boost phase of flight.

During the test, the modified Boeing 747-400 freighter first used its infrared sensors and beam control sensors to successfully find and track Big Crow, the target aircraft used for the test. On this initial test of the SHEL, ABL made use of beacon lasers installed on Big Crow to simulate the targeting return it would receive from a live missile target.

The SHEL is a low-power laser used to simulate the characteristics of the high-energy Chemical Iodine Oxygen Laser that will be installed on ABL beginning later this year. The high-power laser has completed more than 70 successful firings during ground testing.
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Post by Arun_S »

Here is draft DRDO-AAD missile size along with the PAD.
Image
The AAD is expected to be
1. 3000 Kg mass including ~350Kg payload section
2. After 38 seconds final velocity of 2.6Km/sec; Mach 8 (@21 km altitude and 38 Km LOS distance)
3. Booster mass of ~2650kg
4. Stowed in canister.
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Post by Austin »

Does ~ 350 Kg payload section is the warhead mass ? Or does that includes ARH sensors and other stuff ?

from the specs the AAD looks like very optimised BM killer rather than what was initially thought as anti-aircraft/missile system , Should nicely compliment the PAD
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Post by Arun_S »

Austin wrote:Does ~ 350 Kg payload section is the warhead mass ? Or does that includes ARH sensors and other stuff ?
The latter.
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Post by JCage »

Arun, so this is a BM optimized interceptor. Any details about tests planned and associated sensor network?
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Post by Austin »

Arun_S wrote:1. 3000 Kg mass including ~350Kg payload section
4. Stowed in canister.
I am wondering at ~ 3 tons isnt that a super heavy SAM , The canister itself will weight around ~ 0.5 tons

And since the booster mass itself weighs 2650 kg and it is a single stage system , It would simply be carrying the dead weight of the system at the far end of its engagement envelop
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Post by Austin »

JCage wrote:so this is a BM optimized interceptor
JC my understanding is looking at the design the AAD would use a combination of conventional control surfaces and Thrust Vectoring. So at lower altitude where the control surface is effective it can be used to intercept aircraft/cruise missile and at higher altitude where the air is thin and control surface are not as effective it would rely on TVC to do its job , But the disadvantage is as I see it , though I may be kicked off for saying that is the Control Surface would add on to the drag.
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Post by Shankar »

JC my understanding is looking at the design the AAD would use a combination of conventional control surfaces and Thrust Vectoring. So at lower altitude where the control surface is effective it can be used to intercept aircraft/cruise missile and at higher altitude where the air is thin and control surface are not as effective it would rely on TVC to do its job , But the disadvantage is as I see it , though I may be kicked off for saying that is the Control Surface would add on to the drag.
-putting it somewhat diffrently at low intercept speed the control surfaces gives better aero dynamic agility TVC is usally superior at high intercept speed eiether at the end of range low altitude or lower contact range higher altitude .Also I think control surfaces are good for post launch roll control at high cross wind situation
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Post by JCage »

Boss, I agree, but more than the propulsion, I was looking at the interceptor package, ie whether the 350 KG payload again includes a hit to kill payload + associated electronics.
IOW, this is an expensive (not for its role though, a few million to save a city) specialized missile and we should have simpler systems for namby pamby PAF & PLAAF aircraft. 8)
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Post by Shankar »

Prithvi new version is an out an out anti missile missile like ballistic misiles mostly and maybe a later version configured for cruise missiles on tercom sea skimming mode .

you really dont believe our money concious PM will agree to spend several millions just to shoot down a f-16 .

My projection /guess is the first regiment of prithvi ad version is already deployed around national capital region with the s-300s reported in press sometimes back and may be Mumbai too has some anti missile protection from the braks and posibly a lone s-300 battery .Like always the test was done after putting the system to use like all our important strategic projects along with a proven overseas system as back up

once again this is just a calculated guess nothing more -and nothing less
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Post by Austin »

JCage wrote:Boss, I agree, but more than the propulsion, I was looking at the interceptor package, ie whether the 350 KG payload again includes a hit to kill payload + associated electronics.
IOW, this is an expensive (not for its role though, a few million to save a city) specialized missile and we should have simpler systems for namby pamby PAF & PLAAF aircraft. 8)
No dude its not at all expensive , and when you compare with Phoren mall like S-300 , PAC-3 it would be cheaper and customised per our needs.

The primary job of AAD is to take care of leakers i.e the one which managed to slip the PAD net , and to take care of SRBM ( < 600 Km ) for which a PAD would be an over kill

But with its additional ability to take on anti-aircraft role it would just add to its capability i.e. use it in anti aircraft role when required.

But for anti aircraft role we would have range and options which are more customised to take care of air breathing targets.
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Post by Vick »

Will PAD be solid or liquid fueled?

Nevermind, I found the answer from a Saraswat interview:
The missile that demonstrates our capability to intercept ballistic missiles at exo-atmospheric altitudes is called PAD. It is a two-stage missile. The first stage is liquid, and the second is a solid rocket motor with many additional features, which are leading to an interception or engaging the ballistic missiles. For example, it has seeker guidance, divert thruster which can generate a lateral acceleration at more than 5 Gs at 50 kilometers altitude.
Arun_S
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Post by Arun_S »

Excuse me but why does ABM interceptor be also be a SAM? { also make it short range Low-Level SAM and also long range SAM} and why not extend the requirement to also add the role of AshM and short range BM? Did I miss something? Gold plated "Jack of All Trade" missile that is too expensive for any of the role with low & suspect Pk. :twisted:

Pls do not forget there is an economic cost/benefit analysis in war & weapon too.

BTW ABM requirements are mostly driven by high average velocity and NOT maneuverability. The stuff shoots like an arrow and is critically dependent on initial aiming. Unfortunately if has no room for excuse for wrong aiming.


As for AAD, it is to seal the gap of high altitude ABM interceptor. It is the LAST resort to intercept BM at the edge of protection bubble limits. Pls note that AAD would be fired after PAD is launched, but before PAD has yet intercepted the BM. Recall that an IRBM velocity is ~4 Km/sec and PAD kill box altitude is ~50 Km and AAD killbox ~20Km; Just 6-9 seconds of IRBM flight time. Now considering PAD flight time {to kill box} of ~70 second and AAD flight time ~ 40 second, one can see that AAD is launched 40 seconds after PAD ( viz: 70- 40 +9) and the precious 40 seconds used to
1. more realibly discriminate target from decoys
2. more accurately determine target trajetory

Given that AAD travels in relatively dense atmosphere at hypersonic speed, there is not a lot of AoA envelop for aggressive aerodynamic maneuver (la sidewinder stunt); not sure if and how divert thrusters can play a role in terminal maneuver. Paging N^3 for aero expertise.

In industrial engineering there is a term called "Use Right Tool for Right Job". Instead of concentrating only on interceptor and its manuverability, one must solve the root problem of determine target trajectory; needing powerful and sensitive radar/optical sensors:
1. to discriminate decoys
2. accurately determine BM trajectory (IMHO position error < 2 meter, velocity error < 0.1m/sec) at least 120 seconds before BM hits home target.
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