Design and Engineering of Agni VI missile is finished

sorcerer

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The Importance of Agni-V to India’s Security

The fourth Agni-V test is scheduled to be conducted during the month of February 2016.
This will be the second canister launch. Agni-V will be ready for induction after few more tests – especially the test of its multiple independent targeting re-entry vehicles (MIRV) capability.

Although its induction and deployment is some years ahead, it has already produced interesting reactions. The key discussion has been about its range – whether it is 5000 km or 8000 km and above, and whether it should be truly called an ICBM. There has also been some buzz about the multiple independent targeting re-entry vehicles (MIRV) capability and their ability to carry 3-10 different warheads in a single missile. Indeed, it is a major feature and technology that will catapult India to a very small set of nations with this capability.

The ability to carry 1-1.5 tons warhead over 5,000+ kilometers range is definitely another feature of the missile that puts it in a different category than whatever missiles India has. A 500 Kg payload can give the earlier missiles ability to carry nuclear warheads with 20KT yield, or something similar to what was exploded above Hiroshima and Nagasaki. With three times the payload, India now has the capability, in theory, at least, to carry higher yield, say 150KT to 1 MT yield nuclear warheads to distances more than 5000 km away. This gives India a real counterforce capability if our doctrine and strategy warrants that option.

Counter-Force versus Counter-Value Nuclear Strategies
If a country has the capability to strike population centers of the adversary with nuclear weapons, it is considered to have counter value capability in nuclear strategy terminology. These targets include population centers including big cities, large industrial complexes, power centers, dams, oil refineries etc. The counter value targets typically are “non-military targets” of the adversary, mostly population centers. As these are mostly larger spread and “soft” targets, the lower yield nuclear weapons, say with a yield of 20 Kilo Tons (KT) of TNT or so, are considered sufficient to pronounce this capability.

Further, for counter value nuclear forces, one need a delivery weapon – can be a ballistic missile – which need not have a very high accuracy. One can understand, that if a nuclear bomb explodes above the center of the city or few kilometers away, the devastation of the city will be immense, and in the long term there will not be much qualitative difference in terms of impact on the city – say killing 1 million people immediately or 500,000 people immediately – which one will you take? The obvious answer is none.

The counter value nuclear forces are giving this message to the adversary – we will take a couple of your cities – whether our missile takes 1 million or 0.5 million people of your city is not important – we can destroy a couple of your main cities if you attack or threaten us with a nuclear weapons strike. The counter value nuclear weapons are the forces to deter the adversary. These are indeed deterrence forces.

On the other hand, counter force nuclear forces are meant to destroy adversary’s nuclear delivery capability. The counter force nuclear weapons need to deliver high KT or even Mega Ton (MT) of TNT equivalent nuclear yield to the enemy nuclear weapons housed inside the hardened, underground, nuclear shielded sites. Besides, high yield and very high accuracy (typically a Circular Error Probability of 0.01% of the range), the nuclear explosion has to be a surface burst rather than an air burst as in the case of counter value weapons.

The surface burst will create large ground craters and take the earth along with adversary’s missiles in the protected silos – to the atmosphere – thereby destroying enemy’s nuclear missiles and also creating the dreaded nuclear fallout and radioactive rains that may continue for many months in future. These are truly horrendous nuclear weapons – not only in the capabilities but also the intentions of their possessors.

India’s Nuclear Doctrine and Mutual Assured Destruction (MAD)
India conducted its first peaceful nuclear test in 1974. In 1998, India was forced to conduct nuclear tests so that Pakistan could come out as an overt nuclear weapons state. India should be given due credit for speaking the language of a nuclear weapons free world and acting on it till 1998. Only because one-sided treaties such as NPT, CTBT, and FMCT, were coming to force, India conducted its nuclear tests. Also, within a couple of years, it published its draft nuclear doctrine, which clearly termed the policy of No First Use (NFU) of nuclear weapons. This is a very consistent communication and definitely a responsible behavior, that none can dispute.

With the NFU doctrine, India does not need counterforce capabilities. This is true, against any adversary or potential adversary. The counterforce nuclear weapons developed during the cold war period into what in the nuclear parlance is called the Mutually Assured Destruction (MAD) doctrine. It is clear that MAD is the doctrine of a country that will take the nuclear attack as the first option in the escalatory spiral of any conflict. However, India has very clearly stated it is not following the MAD line and is therefore not developing any first strike capability against any adversary at any range.

However, given the proliferation of nuclear weapons around the world and pressure by the world powers that are increasingly developing more and more powers, India needs to develop a second strike capability, that remains potent after a first strike by the adversary and is capable of delivering counter value punches at any range across the world.

Why ‘at any range’? The world is definitely becoming multi-polar and also the threat of force as a coercive influence to shape the future is pursued by different power centers in multiple ways. Further, a nation in the globalizing world has to identify its national interests and safeguard these globally. Hence, India needs a potent second-strike ICBM-range capability for counter value nuclear strikes as a deterrence to any potential adversary that may have designs to either threaten or actually think about taking out Indian nuclear missiles in the first strike. It is in this context that Agni-V MIRV ICBM should be viewed and considered.

Agni-V can be a Second Strike Counter Force Capability – A game Changer
Agni-V with its higher payload and MIRV capability – with high accuracies – does give India a counterforce capability. This is definitely a higher order message to potential adversaries. With Agni-V, India says to the world that although we stick to a no first use policy we now have a counter-force capability to strike at the nuclear strike forces of the adversary. Also, with MIRVs even if one Agni-V survives a first strike by the enemy and reaches the adversary’s capital city it will unleash complete devastation. This should make an adversary see the futility of striking against India.
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Screambowl

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So, that 6,000 km range would make it into the ICBM category. We have never tested an ICBM before.

My question is, if we are finally going to enter the ICBM club, why stop at 6,000 km? Why not go for a 10,000 km missile?
I am sure they are not developing agni VI with a range of just 1000 km more than Agni V. I am sure it is much more than 6000km.
 

HariPrasad-1

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So, that 6,000 km range would make it into the ICBM category. We have never tested an ICBM before.

My question is, if we are finally going to enter the ICBM club, why stop at 6,000 km? Why not go for a 10,000 km missile?
Agni III, Agni V and all onward Agnis are ICBMS and the range is much more than what is advertised.
 

Gessler

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I feel the Govt. and SFC have decided that land-based BMs can be capped off at 5,000km. Atleast officially.

Longer-ranged 'ICBM'-class missiles will be deployed on the SSBNs only. Like the K5 SLBM with an advertised 6,000+ km (6500km according to sources) range and a 2-ton payload capacity with MIRVs.
 

I_PLAY_BAD

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So, that 6,000 km range would make it into the ICBM category. We have never tested an ICBM before.

My question is, if we are finally going to enter the ICBM club, why stop at 6,000 km? Why not go for a 10,000 km missile?
According to Chinese analysts if India is testing a missile with a published range of 5000 KMs it is actually 6500 KMs. So 6000 KMs is not an accurate number.
 

warrior monk

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According to Chinese analysts if India is testing a missile with a published range of 5000 KMs it is actually 6500 KMs. So 6000 KMs is not an accurate number.
Actually the Chinese said Agni-V 's range is 8000 kms , in the future most countries with ICBMs will use these STOF systems or Depressed trajectory non efficient , low apogee trajectory which deviates from minimum energy trajectory or the normal ballistic trajectory .
These trajectories have re entry angle at 7 to 12 degrees instead of 35 to 40 degs. This symmetric and asymmetric DT will also be used by India to prevent our PBCS ( Post boost control vehicle ) from being knocked out by Chinese Exo Atmospheric kill vehicle. For Pakistan we don't need STOF system they don't and won't have anything resembling BMD.
 

I_PLAY_BAD

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Is Surya still on or not ?
They initiated it a couple of decades ago but still no concrete data on that project ?
 

no smoking

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Actually the Chinese said Agni-V 's range is 8000 kms
That is a myth populated online, which is not true. What the Chinese expert actually said was: Agni-V can increase its range by certain measures such reducing the weight of warhead or use different trajectories, which can be applied to most of missiles of any country.

These trajectories have re entry angle at 7 to 12 degrees instead of 35 to 40 degs. This symmetric and asymmetric DT will also be used by India to prevent our PBCS ( Post boost control vehicle ) from being knocked out by Chinese Exo Atmospheric kill vehicle.
No, that technology was developed in last 70s to reduce the early warning time, which is almost necessary feature of modern missiles. It only works for those interceptors within atmosphere. That is exactly why people are developing mid-stage BMD--killing the RV before re-entry. Actually, the current tech to protect your own missile from Chinese BMD is: orbit maneuver. India already had this tech, but not sure if you have integrated it into missile.
 

sasum

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Is Surya still on or not ?
They initiated it a couple of decades ago but still no concrete data on that project ?
It seems Surya has been consigned to cold storage at the behest of US. However, 12000 to 16000 km range missile doesn't pose a major technical challenge to DRDO. I remember, erstwhile DRDO chief, Dr. V.K. Saraswat saying in an interview, long range missile was more of a political decision; at DRDO's end it was only a matter of adding one or two more rocket stages.
 

Kshatriya87

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So the warheads would drop automatically after 100km? Isn't there a way to control the drop locations of warheads so that we can hit multiple cities by a single missile ?
Will someone answer my question?
 

warrior monk

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That is a myth populated online, which is not true. What the Chinese expert actually said was: Agni-V can increase its range by certain measures such reducing the weight of warhead or use different trajectories, which can be applied to most of missiles of any country.
I don't know the veracity of the claims and can only speculate here Chinese only have noticed infra red signature of the test and tracked the trajectory of the test missile ( Its normal) and probably realized the the missile is not reaching its apogee as determined for its MET and so tried to guess its true range and gave a fake figure of 8000 kms . Its normal for countries to test their missiles at DT instead of MET.

No, that technology was developed in last 70s to reduce the early warning time, which is almost necessary feature of modern missiles. It only works for those interceptors within atmosphere. That is exactly why people are developing mid-stage BMD--killing the RV before re-entry. Actually, the current tech to protect your own missile from Chinese BMD is: orbit maneuver. India already had this tech, but not sure if you have integrated it into missile.
No where did I claim it was developed recently. No its not a necessary feature of all modern missiles only countries who have made ablative heating shields for their RV can do that .

If Agni can take STOF trajectory like DT-60 both symmetric and asymmetric configuration or DT-85 in both symmetric and asymmetric configuration or in between trajectories it will be above the stratopause in the mesosphere so technically inside the atmosphere traveling at 6.5 km/sec , it will be a tough kill especially given the low flight time and if India figures to maneuver the de-coasting phase control vehicle in future it will make it tougher for kinetic kill of the missile.
Anyways lets wait for Agni-6
 

warrior monk

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Will someone answer my question?
No they don't drop automatically they are cued to the pre determined point on impact . The RV atmospheric re entry is determined by the nose cone geometry and L/D ratio for minimal drag if MET ( Minimum energy trajectory ) is being followed .
The post boost control system of the missile use sequential launched adapters on the vehicle which are used to align multiple payloads in their trajectory which will be controlled by the bus carrying the nuclear payload .

Then multiple vernier rockets which are used to pitch the rocket can control and align the PBCV towards optimal ballistic trajectory , movable flaps which can provide three degrees of freedom for ballistic course correction and mass asymmetry , jet interaction for steering out navigational errors for optimal choice of altitude at which to initiate and terminate maneuver in the atmospheric phase

Various algorithms are used during different phases
A closed loop guidance algorithm for guiding the RV for optimal ballistic re entry . The mission starts with a de-boost phase in which eight reaction control system (RCS) thrusters will be used to reduce the velocity of the vehicle due to the presence of pseudo forces like Coriolis force and Euler force then a low thrust algorithm which controls the RV during the de-boost phase , Coast phase (where the vehicle coasts to atmospheric entry so that during atmospheric flight, the vehicle is aerodynamically stabilized) and terminal phase.
The Missiles Terrain Referenced Navigation which is a redundant system along with RLGS based INS using the position measurement obtained through comparing the measured altitude data from a sensor with the stored digital elevation map and the Digital Scene Matching Area correlator act as terminal guidance .
 

Kshatriya87

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No they don't drop automatically they are cued to the pre determined point on impact . The RV atmospheric re entry is determined by the nose cone geometry and L/D ratio for minimal drag if MET ( Minimum energy trajectory ) is being followed .
The post boost control system of the missile use sequential launched adapters on the vehicle which are used to align multiple payloads in their trajectory which will be controlled by the bus carrying the nuclear payload .

Then multiple vernier rockets which are used to pitch the rocket can control and align the PBCV towards optimal ballistic trajectory , movable flaps which can provide three degrees of freedom for ballistic course correction and mass asymmetry , jet interaction for steering out navigational errors for optimal choice of altitude at which to initiate and terminate maneuver in the atmospheric phase

Various algorithms are used during different phases
A closed loop guidance algorithm for guiding the RV for optimal ballistic re entry . The mission starts with a de-boost phase in which eight reaction control system (RCS) thrusters will be used to reduce the velocity of the vehicle due to the presence of pseudo forces like Coriolis force and Euler force then a low thrust algorithm which controls the RV during the de-boost phase , Coast phase (where the vehicle coasts to atmospheric entry so that during atmospheric flight, the vehicle is aerodynamically stabilized) and terminal phase.
The Missiles Terrain Referenced Navigation which is a redundant system along with RLGS based INS using the position measurement obtained through comparing the measured altitude data from a sensor with the stored digital elevation map and the Digital Scene Matching Area correlator act as terminal guidance .
Good. But does this mean the single missile can hit multiple cities? Or would it be just a cluster type attack limited to a single city? What I mean is, the range of different warheads from a single missile is what?
 

HariPrasad-1

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Good. But does this mean the single missile can hit multiple cities? Or would it be just a cluster type attack limited to a single city? What I mean is, the range of different warheads from a single missile is what?
Yes, it can hit multiple target if they are not very much geographically apart. Say more than 1000 k m.
 

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