Multiple Independently Targetable Reentry Vehicles (MIRVs)

HariPrasad-1

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IMO the mirv'd missile is ready , testing will be a political decision to deliver the biggest bang for the buck. The multi satellite launches are a testament.
Yes, I think that at the time of Second test of A 5, Scientist had seek the permission to Test A5 with MIRV but MM refused to give the permission. This was stated by bharat karnad in his article in india today.
 

no smoking

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It is not the case. Even decades old technique of covering the US Space Shuttle with Silica Tiles worked and the shuttle returned unburnt. For MIRV, SHARP materials (there are quite a few) capable of withstanding 3600° C at Mach 11 are used. Even Ceramics are good heat-shields. Heat-shields for warheads are minor issues; main is deployment and homing.
First of all, the 3600° C is only for those space shuttle and satellites which decelerate as soon as re-entry starts. For warheads, especially ICBM warheads, there is no deceleration at all. So, generally, for them, the temperature need to deal with is.....above 8000° C.

And the heat-shields for warheads are minor issues? You should tell this to those designers, they will laugh their ass off. Generally, heat-shield is the one of the key issues you have to test in the first several experiments because:
1. the quality of heat-shield will make sure whether the electronic and even nuclear core can work properly;
2. As I pointed out before, the shield is taking away the heat by burning off part of itself, which means the outfit is changing in the re-entry. So, you have to make sure that shield is always having a right shape in the whole procedure. People have to build up win-tunnel to emiluate the burning of the shield in atmosphere. Even so, there is plenty of failures for each of P5 caused by shape change.
 
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sasum

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For warheads, especially ICBM warheads, there is no deceleration at all. So, generally, for them, the temperature need to deal with is.....above 8000° C.
Yes, there is deceleration in case of ICBM warheads also. The warhead has wings & tailfins to allow them to float and glide at a reduced speed. Other methods are lifting-body shape of warhead. Here the shape is opposite of aerodynamic..meaning this shape induces tremendous drag through the atmosphere to slow down warhead or space-module. You can google to see pics of lifting-body aircrafts of 60s. They have no or very small wings. The belly is rounded and when in forward motion, the plane tends to lift up by the flow of air thru the belly.
As I pointed out before, the shield is taking away the heat by burning off part of itself, which means the outfit is changing in the re-entry
So, you have to make sure that shield is always having a right shape in the whole procedure
What you have in mind is Ablative heat-shields.
These heat-shields do not change shape, they get charred and fall off. These are mostly silicone-rubber and old method. They get melted/ charred while absorbing heat. "Radiative" heat-shields are more preferred now-a-days. These materials like ceramic, barillyum and even copper deflect heat. A special kind of plastic is also used.
So for heat-shields, it is now a settled issue. Every space-faring Nation follow the same protocol.
 
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Old article hinting at Agni 6

http://ajaishukla.blogspot.com/2012/04/no-intention-to-cap-missile-programme.html?

No intention to cap missile programme with Agni-5




By Ajai Shukla
Business Standard, 21st Apr 12

After the near-perfect debut of the Agni-5 long-range ballistic missile, which yesterday travelled 5000 kilometres to accurately strike a target in the southern Indian Ocean, Dr VK Saraswat, the Defence R&D Organisation chief, declared that the Agni programme would continue and that there was no question of capping India’s missile programme.

Addressing a press conference in New Delhi, Saraswat said, “Our development needs are based upon today’s threats, and also evolving threats…. So there is no question of capping any programme…. Today, in a short time, we have gone from Agni-4 (launched in Nov 11) to Agni-5, Obviously we have a threat profile which is evolving and I am not sure it will ever remain static. So we are going to continue to develop missiles to meet our future threats.”

The first big enhancement to the successful Agni-5 will involve creating the capability of hitting several different enemy targets with multiple warheads on a single missile. This technology, called multiple, independently targetable, re-entry vehicles (MIRVs) is already being developed by the DRDO.

Dr Avinash Chander, the DRDO’s chief controller of missiles, explained that such a missile would be “all-composite”. The Agni-5 has three stages, with the second and third stage built of composite materials. The next missile will have a composite first stage as well, making it lighter and, therefore, able to carry a heavier payload than the 1.5 tonne payload of the current Agni-5.

According to DRDO sources, an MIRV payload would be significantly heavier, since it would consist of several nuclear warheads, each of them weighing about 400 kilogrammes. A 5-warhead MIRV, therefore, would weigh two tonnes.

“The primary modules of MIRV are in an advanced stage of development. Realization and integration of them into a weapon is just a question of threat perceptions and the need as it arises,” said Chander.

Saraswat laid down a two-year time line for the Agni-5 to enter operational service. “We will do two more validation tests, which should take about 1½ years. After that, we will begin production (of the Agni-5) and we will start handing it over to the military. Once they have it, they will do some launches for their training as well. This will take about two years.”

The DRDO chief revealed that the missile was 80% indigenous, with just 20% consisting of “those components which are easily available as part of the electronics components industry.” He stated that the missile does not contain a single critical component that is under embargo.


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Bornubus

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According to Maj Gen Bakshi Chinese supplied TEL for shaheen missile is a major threat for India.

I don't know if we have any similar TEL for our missiel or just Tata Trucks.
 
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interesting Pakistani article

http://www.pakistantoday.com.pk/2016/06/30/implications-of-indias-mtcr-entry/

Implications of India’s MTCR entry

India has become the 35th country to gain membership into the Missile Technology Control Regime (MTCR) which sets guidelines to control the production and delivery of missiles and unmanned aerial vehicles capable of mass destruction. India was accepted after a consensus decision taken by the existing member nations. Previously, Italy was opposed to India’s entry into MTCR because of a diplomatic row between the two countries following India’s detention of two Italian marines on suspected murder charges. Salvatore Girone and Massimiliano Latorre, two Italian marines — on board the Italian ship ‘Enrica Lexie’ — were accused by India of killing two of its fishermen off the Kerala coast in 2012. Massimiliano Latorre, returned to Italy after suffering a cardiac stroke in 2014. India now played a deft card, securing Italy’s support for its entry into the MTCR in return for sending Salvatore Girone home.

India’s MTCR membership will not only benefit India’s space program but also strengthen its export controls which will encourage member nations to transfer sensitive technologies to India without the constraint of facing US sanctions. MTCR is one of the four non proliferation regimes, enacted by group of nations controlling sensitive technologies as part of global non proliferation effort. The other three are the Wassenaar Arrangement dealing with export control of conventional arms and dual use technologies. Australia Group focuses on export controls on technologies with regard to chemical and biological weapons. Lastly is the Nuclear Supplier Group (NSG) a grouping of 48 countries that seeks to prevent proliferation of nuclear weapons

The MTCR was created to curb the spread of unmanned delivery systems for nuclear weapons in particular delivery systems with a minimum payload of 500 kg at a maximum range of 300 Km. Subsequently with the proliferation of unmanned aerial vehicles including combat aerial vehicles these were also inducted with the ambit of the guidelines.

This is a big consolation for India, which failed to gain entry into the NSG Plenary session at Seoul last week.

MTCR was established in April 1987 by the G-7 countries (Canada, France, Germany, Italy, Japan, the UK, and the United States). It is not an official treaty with legally binding obligations. It is only an informal political understanding. The purpose of the MTCR is to aid in international peace and security by destabilising delivery systems that make it easier for the transfer and delivery of weapons of mass destruction (WMD). MTCR partners are entitled to participate in the decision making of the future of MTCR and are expected to set the international standard for responsible non-proliferation behaviour. The items included under MTCR guidelines are divided into Category I (complete rocket and unmanned aerial vehicle systems) and Category II (dual use missile related components and systems). Although there is no formal secretariat of the MTCR, France is the Point of Contact (POC).

All MTCR decisions are made after a full consensus involving all current partners. MTCR has been successful in getting Argentina, Egypt and Iraq to abandon their Condor II ballistic missile program. MTCR works together with the International Code of Conduct against Ballistic Missile proliferation (ICOC) to achieve its objective of non-proliferation of delivery systems capable of delivering WMD.

Let us examine the implications of India joining the MTCR. Firstly, its credentials as being a signatory to serious weapons control regimes have improved, enhancing its acceptability into NSG. Secondly, it can bargain with China for supporting India’s entry into NSG, while in a quid pro quo action, India can support China’s entry into MTCR. The People’s Republic of China is not a member of the MTCR but has agreed to abide by the original 1987 Guidelines and Annex, but not the subsequent revisions. China first verbally pledged that it would adhere to the MTCR in November 1991, and included these assurances in a letter from its Foreign Minister in February 1992. China reiterated its pledge in the October 1994 US-China joint statement. In their October 1997 joint statement, the United States and China stated that they agree “to build on the 1994 Joint Statement on Missile Nonproliferation.” In 2004 China applied to join the MTCR, but members did not offer China membership because of concerns about China’s export control standards.

India on the other hand, which on a number of occasions was denied critical missile technologies owing to MTCR provisions or sanctions, will now have access to the high-end missile technology, also making more realistic its aspiration to buy surveillance drones such as the Predator, made by General Atomics.

Let us examine a few of the instances. India failed to get approval for the acquisition of “Arrow II” theatre missile defence interceptor from Israel as part of Indian attempt to develop indigenous “Ballistic Missile Defence”. The transfer of both the missiles and technology was subject to US approval owing to its contributions in the development of the interceptor technology of the “Arrow II” system. The then US Administration was of the view that it was committed to apply MTCR guidelines in any re–transfer situation, particularly taking into account impact of any such transfers on missile defence cooperation with other states. Resultantly neither the sale of missile systems nor the technology transfers went through even though Israel was willing.

In another instance, India was stopped from obtaining cryogenic technology from Russia. The US placed impediments in the acquisition because of India’s pursuit of strategic ICBM program based on Agni IV/V series or the “Surya” missiles using two stages of PSLV with strapped on third stage derived either from French ‘Victor’ rocket or cryogenic engines from Russia. US concerns were that this will provide India with a powerful ICBM capability with ranges far exceeding 5000 Km and the ability to strike continental US thus it slapped sanctions on both India and Russia in 1990. These were lifted in 1993 only after Russia agreed to stop supply of cryogenic technology to India and restrict the sale to a few engines. The US sanctions were deftly sidestepped by Russia because it clandestinely enabled India to master cryogenic technology internally and today Indians are in a position to launch heavy satellites in space that in future could include manned space missions.

Another field, where India will gain a major advantage, will be the Drone technology.

India has been developing long endurance drones namely “Medium Altitude Long Endurance (MALE)” and “High Altitude Long Endurance Drones (HALE)” with endurance capabilities at station from weeks to a month. India has been facing some critical technological issues in their development. Post entry into MTCR, India will be able to seek these technologies in collaboration with other MTCR. Similarly should India seek to both buy Drones like Predators which are essentially Unarmed Combat Vehicles it can do so.

Let us briefly look at India’s missile inventory, especially those that fall outside the ambit of MTCR limits. Prithvi-III (350-600 Kms), Agni-I (700-1,250 Kms), Agni-II (2,000-3,000 Kms), Agni-III 3,500-5,000 Kms), Agni-IV (4,000 Kms), Agni-V (5,000-8,000 Kms), Agni-VI Submarine Launched (6,000 plus), Agni-VI MIRV (8,000-12,000 Kms) and Surya Submarine Launched MIRV with a range of 10,000 Kms plus are all weapon systems in this category prohibited by MTCR. The question is what actions India would take regarding them. An equally relevant question is Pakistan’s options, which will be examined in a subsequent article.
 

Cutting Edge

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Considering the fact that the third stage of A5 is conical , IMO there is not enough room for MIRV .
I don't think conical shape is preventing MIRV deployment. Yes large number of warheads can't be put inside but 3 to 5 small warheads won't be an issue.


 

Cutting Edge

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multiple satellite lauches have been done by india a feat harder than MIRV'ing missiles imo.
The problem isn't tech but rather political will. We waited decades to test nukes. We still are afraid to reveal full range of our missiles just because others nations may not like it. Lol did USA, GB, France, Russia, etc thougt about what Indians might think when they were testing ICBMs with 16000+ range.

We are yet to recover from Nehruvian mindset of being perceived weak will somehow make us more liked and respected. Chinese knows about this weakness and they are fully exploiting it in UN.

I hope MoD gathers some strength and test MIRVed A4 and A5 before testing A6.
 
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We are yet to recover from Nehruvian mindset of being perceived weak will somehow make us more liked and respected.
This weak perception is something Indians government has worked very hard to
achieve do not take it away so quickly(sarcasm) Do not worry about what other nations
think they have strong alliances and arsensals. It is India that has fallen behind.
 

Cutting Edge

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This weak perception is something Indians government has worked very hard to
achieve do not take it away so quickly(sarcasm) Do not worry about what other nations
think they have strong alliances and arsensals. It is India that has fallen behind.
Sometimes I think having Pak and China as neighbours is actually a blessing in disguise, because the only reason India is putting this much effort in defence tech is only because of immediate threat from Pakistan. If we didn't have crazy, fanatic neighbour like Pak we might have completely dissolved our military to a point where even Nepal or Bhutan would be eyeballing us.:shoot: Lol.:rotfl:
 
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Sometimes I think having Pak and China as neighbours is actually a blessing in disguise, because the only reason India is putting this much effort in defence tech is only because of immediate threat from Pakistan. If we didn't have crazy, fanatic neighbour like Pak we might have completely dissolved our military to a point where even Nepal or Bhutan would be eyeballing us.:shoot: Lol.:rotfl:
The genius Nehru at one time wanted to get rid of the armed forces. Much of the mess
in India's history is created by Indians.
 
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http://thediplomat.com/2016/12/india-to-test-fire-nuclear-missile-capable-of-hitting-china/

India to Test Fire Nuclear Missile Capable of Hitting China

The Agni-V, a three-stage solid fueled missile, has an approximate range of 5,500-5,800 kilometers, and can carry a 1,500-kilogram (3,300-pound) nuclear warhead. India has reportedly also been working on multiple independently targetable reentry vehicles (MIRV) for the Agni-V in order to ensure a credible second strike capability. In addition, India is already working on the Agni-V’s successor, the Agni-VI, most likely a four-stage ICBM with MIRV and a maneuverable reentry vehicle (MaRV) capability.
 

Chinmoy

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http://thediplomat.com/2016/12/india-to-test-fire-nuclear-missile-capable-of-hitting-china/

India to Test Fire Nuclear Missile Capable of Hitting China

The Agni-V, a three-stage solid fueled missile, has an approximate range of 5,500-5,800 kilometers, and can carry a 1,500-kilogram (3,300-pound) nuclear warhead. India has reportedly also been working on multiple independently targetable reentry vehicles (MIRV) for the Agni-V in order to ensure a credible second strike capability. In addition, India is already working on the Agni-V’s successor, the Agni-VI, most likely a four-stage ICBM with MIRV and a maneuverable reentry vehicle (MaRV) capability.
Agni-VI or Surya is IMO mere speculation as of now. Agni-V itself would get MIRV in coming days. As far as news goes, even Agni-IV is undergoing upgradation to be an ICBM rather then IRBM. If I've to believe in all what I hear, Agni-V is going for 10K soon enough.
Much of our next priority should be in SLBM. A 10K Sagarika with MIRV or MaRV is much more potent then a Surface to Surface ICBM.
 

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