DrSomnath999
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1.INTRODUCTION
DF 21D ASBM :
An anti-ship ballistic missile (ASBM) is a military quasiballistic missile system currently in developement, of medium or intermediate range, designed to hit a warship at sea. Because of speeds typically reaching Mach 10 there are currently no ship-board defense mechanisms that could counter an ASBM in the terminal phase.
ASBM are equipped with a conventional warhead large enough, together with the kinetic energy, that a single hit has the potential to cripple or outright destroy a supercarrier, but unlike nuclear weapons have to hit the target precisely to be effective. Thus, and unlike a typical ballistic missile, which follows a ballistic flightpath after the relatively brief initial powered phase of flight, an ASBM would require a precise and high-performance terminal guidance system.
China has developed and reached initial operating capability of a conventionally-armed high hypersonic land-based anti-ship ballistic missile (ASBM) based on the DF-21. This would be the world's first ASBM and the world's first weapons system capable of targeting a moving aircraft carrier strike group from long-range, land-based mobile launchers.
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
A hypersonic cruise missile is a cruise missile that would travel at least 6-7 times the speed of sound (MACH 6-7) & is powered by scramjet engine.BrahMos II is a stealth hypersonic cruise missile that is being currently under development that can fly at Mach 7. But brahmos2 may be hydrocarbon based dualmode ramjet & scramjet powered platform or hydrogen powered
single mode scramjet powered vehicle .
http://i953.photobucket.com/albums/ae20/ironmandef/12.jpg
2.RANGE:
DF 21D ASBM :
China has reportedly developed and tested the world's first anti-ship ballistic missile called DF-21D, with a maximum range of around 3,000 kilometres (1,900 mi), in 2005, according to the US Department of Defense.
Anti-ship ballistic missile - Wikipedia, the free encyclopedia
Looking beyond a regional maritime strike capability,Chinas defense industry has been evaluating the feasibility of a global conventional strike capability as an incremental follow-on to the successful deploymentofan ASBM.Based on a broad survey of available literature,this paper post its that the PRC has a phased approach for development of a conventional global precision strike capability by 2025.The process can be divided into four key phases:
The initial phase seeks to have a rudimentary 1,500 to 2,000 km range ASBM capability available to the PLA by the end of the 11th Five Year Plan in 2010.
A second phase would seek to extend these capabilities out to a range of3,000km by the conclusion of the 12th Five Year Plan in 2015.Chinas aerospace industry has been analyzing alternatives to extend the range of the ASBM while maintaining precision.Among the options include a more advanced solid motor and aboost-glidetrajectory that would complicate mid-course missile defenses.
A third phase would focus on extending conventional precision strike capability out to 8,000km before the end of the 13th Five Year Plan in 2020.
A final phase would involve a global precision strike capability by the conclusion of the 14th Five Year Plan in 2025.
Such a plan would not be setin stone.A number of events could result in cancellation or acceleration of the phases,including a change in threat perception;accelerationor cancellation of similar efforts in other countries,such as the U.S.Prompt Global Strike (PGS) program;a satisfactory conventional arms control program;a severe economic downturn or domestic political crisis and key technological breakthroughs or insurmountable obstacles.
http://project2049.net/documents/chinese_anti_ship_ballistic_missile_asbm.pdf
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
It was agreed to limit the range of BRAHMOS 2 missile to 290 km in order to conform to stipulations of the Missile Technology Control Regime (MTCR) of which Russia is a signatory. The regime forbids export of any missile with a range in excess of 300 km.
Brahmos-2 - a knol by Vijainder K Thakur
But it's range can be easily increased ,so it is just for papers i think ,well definitely in real time situation it would be used to it's full capability range
So DF 21D has much more long range than Brahmos 2 ,as MTCR restricts it's range so advantage to DF 21d in terms of range
3.GUIDANCE SYSTEM:
DF 21D ASBM :
To strike any target with an ASBM, China would have first to form an accurate idea of its recent location.Detecting the carrier at great distances would depend on early-warning systems,such as sky-wave, over-the-horizon (OTH) radar,or electronic signals intelligence,that would give a general idea of the targets geographic coordinates.There is substantial evidence that China has at least one over-the- horizon back scatter(OTH-B) system up and running. It could be used to identify targets at long range,Once the carrier is identifi ed, its position needs to be pinpointed. Long-range unmanned aerial vehicles (UAVs) could gather such information.
another reliable targeting system to support the ASBM, is space-based reconnaissance & targetting system.In the task of fi nding a U.S. carrier at sea, Chinas satellites would vary in their usefulness according to sensor type and resolution.
Of the sensors deployed on Chinas satellites, synthetic aperture radar (SAR) is the most useful for hunting maritime targets,as it can sweep a relatively wide swath at a resolution good enough to image fairly small targets.SAR can produce imagery regardless of weather or sunlight. Instead of merely looking for a carrier group itself, SAR can capture ship wakes
trailing over large stretches of ocean, making it particularly useful for fi nding moving targets.
Multispectral and hyperspectral sensors can also be very effective. For instance, they could spot algae and other phosphorescent material churned up by ships. Infrared and regular visible-light images could also be useful,but they would have relatively narrow foci and could not scan vast stretches of ocean.According to open sources,only four of Chinas satellites in low earth orbit, all in the military Yaogan series,are equipped with SAR.
So for mid course flight of the missile ,guidance would be provided by millimeter-wave radar or Synthetic aperture Radar(SAR),while for terminal phase of missile ,guidance would be provided by millimeter-wave radar or (IIR) passive imaging infra red seeker. The Second Artillery has also completed at least one technical requirements assessment on a CO2 guidance coherent laserimaging radar for ballistic missile terminal guidance.
http://project2049.net/documents/chinese_anti_ship_ballistic_missile_asbm.pdf
http://www.chinasecurity.us/pdfs/others/Hagt&Durnin.pdf
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
Mid-course guidance is through Inertial Navigation System (INS) & while it's terminal phase may have active/passive homing seeker.A Global Positioning System (GPS) has also been made to complement the navigational data computed by INS. GPS is based on an array of low-earth NAVSTAR (NAVigation Satellite Targeting & Ranging) satellites. Computers onboard the missile, communicate with the satellites to accurately determine their instantaneous location.However the US monopoly over NAVSTAR satellites means signals can be "degraded for other users" by United States at their will. India would involve itself in future with the rapidly expanding Russian GLONASS GPS project or other suitable alternatives in terms of scientific collaboration or financial resource sharing.
WHAT
So Brahmos2 guidance system looks far more Simple & effective in such a short range as compare to DF 21D AsBM's guidance sytem which looks far more complicated & prone to misintepretation of target accusation at such long range
4.WARHEAD
DF 21D ASBM :
It can carry both conventional & tactical nuclear warheads ,but use of tactical nukes may not be done due to fear of inciting nuclear war .DF 21D ASBM are equipped with a conventional warhead which is a Manoeuvrable Re-Entry Vehicle (MaRV) large enough, together with the kinetic energy, that a single hit has the potential to cripple or outright destroy a supercarrier, but unlike nuclear weapons have to hit the target precisely to be effective.The missile would also be carrying decoys & other ABM counter measures with it. It may also include Manuvering independently targeted Re entry vvehicle (MIRV)warheads in future missiles .Chinas military is developing electromagnetic pulse weapons and high-powered microwave (HPM) weapons that Beijing plans to use against U.S. aircraft carriers in any future conflict over Taiwan, according to an intelligence report made public on Thursday. Richard Fisher, a China military analyst, said EMP warheads are likely to be an option for Chinas new DF-21D anti-ship ballistic missile for the purpose of attacking large U.S. Navy ships without inflicting immediate massive casualties.
DF-21 - Wikipedia, the free encyclopedia
PLA Ballistic Missiles
China’s Anti-Access Missile | Flashpoints
Report: China building electromagnetic pulse weapons for use against U.S. carriers (Article)
Report: China building electromagnetic pulse weapons for use against U.S. carriers - Washington Times
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
The ship-launched and Sub based missiles can carry a 200 kg warhead, whereas the aircraft-launched variant can carry a 300 kg HE conventional warhead. The high speed (mach 6-7) version of BRAHMOS 2 missile provides better target-penetration capabilities than the supersonic brahmos I cruise missile due to higher kinetic energy than it's predesscor
Brahmos Supersonic Cruise missile
BrahMos Supersonic Cruise Missile - Army Technology
Brahmos Missile - a knol by Vijainder K Thakur
So in terms of warhead DF 21D ASBM is far more powerful & devastating than Brahmos 2 .So a single DF 21D ASBM is capable of sinking a supercarrier while 2 or 3 brahmos II HYPERSONIC ANTI SHIP CRUISE MISSILEs would be required for sinking a supercarrier.
5.SPEED
DF 21D ASBM :
The DF-21 can hit it's targets in terminal phase at speeds of Mach 10- 11, which is high hypersonic missile.so Thermal control becomes a dominant design consideration. Structure must either be designed to operate hot, or be protected by special silicate tiles or similar.
DF-21 - Wikipedia, the free encyclopedia
Hypersonic speed - Wikipedia, the free encyclopedia
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
BRAHMOS 2 would have a maximum speed of (MACH 6-7) i.e 6-7 times the speed of sound.For this new materials to withstand high temperature and vibrations are being developed.
India, Russia work on hypersonic stealth cruise missile - Home » Other Sections » Breaking News
So DF 21dAsBM has much higher speed than Brahmos 2 at it's terminal stage giving it higher destructive power & more difficult
to intercept due to high speeds than brahmos 2
1.INTRODUCTION
DF 21D ASBM :
An anti-ship ballistic missile (ASBM) is a military quasiballistic missile system currently in developement, of medium or intermediate range, designed to hit a warship at sea. Because of speeds typically reaching Mach 10 there are currently no ship-board defense mechanisms that could counter an ASBM in the terminal phase.
ASBM are equipped with a conventional warhead large enough, together with the kinetic energy, that a single hit has the potential to cripple or outright destroy a supercarrier, but unlike nuclear weapons have to hit the target precisely to be effective. Thus, and unlike a typical ballistic missile, which follows a ballistic flightpath after the relatively brief initial powered phase of flight, an ASBM would require a precise and high-performance terminal guidance system.
China has developed and reached initial operating capability of a conventionally-armed high hypersonic land-based anti-ship ballistic missile (ASBM) based on the DF-21. This would be the world's first ASBM and the world's first weapons system capable of targeting a moving aircraft carrier strike group from long-range, land-based mobile launchers.
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
A hypersonic cruise missile is a cruise missile that would travel at least 6-7 times the speed of sound (MACH 6-7) & is powered by scramjet engine.BrahMos II is a stealth hypersonic cruise missile that is being currently under development that can fly at Mach 7. But brahmos2 may be hydrocarbon based dualmode ramjet & scramjet powered platform or hydrogen powered
single mode scramjet powered vehicle .
http://i953.photobucket.com/albums/ae20/ironmandef/12.jpg
2.RANGE:
DF 21D ASBM :
China has reportedly developed and tested the world's first anti-ship ballistic missile called DF-21D, with a maximum range of around 3,000 kilometres (1,900 mi), in 2005, according to the US Department of Defense.
Anti-ship ballistic missile - Wikipedia, the free encyclopedia
Looking beyond a regional maritime strike capability,Chinas defense industry has been evaluating the feasibility of a global conventional strike capability as an incremental follow-on to the successful deploymentofan ASBM.Based on a broad survey of available literature,this paper post its that the PRC has a phased approach for development of a conventional global precision strike capability by 2025.The process can be divided into four key phases:
The initial phase seeks to have a rudimentary 1,500 to 2,000 km range ASBM capability available to the PLA by the end of the 11th Five Year Plan in 2010.
A second phase would seek to extend these capabilities out to a range of3,000km by the conclusion of the 12th Five Year Plan in 2015.Chinas aerospace industry has been analyzing alternatives to extend the range of the ASBM while maintaining precision.Among the options include a more advanced solid motor and aboost-glidetrajectory that would complicate mid-course missile defenses.
A third phase would focus on extending conventional precision strike capability out to 8,000km before the end of the 13th Five Year Plan in 2020.
A final phase would involve a global precision strike capability by the conclusion of the 14th Five Year Plan in 2025.
Such a plan would not be setin stone.A number of events could result in cancellation or acceleration of the phases,including a change in threat perception;accelerationor cancellation of similar efforts in other countries,such as the U.S.Prompt Global Strike (PGS) program;a satisfactory conventional arms control program;a severe economic downturn or domestic political crisis and key technological breakthroughs or insurmountable obstacles.
http://project2049.net/documents/chinese_anti_ship_ballistic_missile_asbm.pdf
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
It was agreed to limit the range of BRAHMOS 2 missile to 290 km in order to conform to stipulations of the Missile Technology Control Regime (MTCR) of which Russia is a signatory. The regime forbids export of any missile with a range in excess of 300 km.
Brahmos-2 - a knol by Vijainder K Thakur
But it's range can be easily increased ,so it is just for papers i think ,well definitely in real time situation it would be used to it's full capability range
So DF 21D has much more long range than Brahmos 2 ,as MTCR restricts it's range so advantage to DF 21d in terms of range
3.GUIDANCE SYSTEM:
DF 21D ASBM :
To strike any target with an ASBM, China would have first to form an accurate idea of its recent location.Detecting the carrier at great distances would depend on early-warning systems,such as sky-wave, over-the-horizon (OTH) radar,or electronic signals intelligence,that would give a general idea of the targets geographic coordinates.There is substantial evidence that China has at least one over-the- horizon back scatter(OTH-B) system up and running. It could be used to identify targets at long range,Once the carrier is identifi ed, its position needs to be pinpointed. Long-range unmanned aerial vehicles (UAVs) could gather such information.
another reliable targeting system to support the ASBM, is space-based reconnaissance & targetting system.In the task of fi nding a U.S. carrier at sea, Chinas satellites would vary in their usefulness according to sensor type and resolution.
Of the sensors deployed on Chinas satellites, synthetic aperture radar (SAR) is the most useful for hunting maritime targets,as it can sweep a relatively wide swath at a resolution good enough to image fairly small targets.SAR can produce imagery regardless of weather or sunlight. Instead of merely looking for a carrier group itself, SAR can capture ship wakes
trailing over large stretches of ocean, making it particularly useful for fi nding moving targets.
Multispectral and hyperspectral sensors can also be very effective. For instance, they could spot algae and other phosphorescent material churned up by ships. Infrared and regular visible-light images could also be useful,but they would have relatively narrow foci and could not scan vast stretches of ocean.According to open sources,only four of Chinas satellites in low earth orbit, all in the military Yaogan series,are equipped with SAR.
So for mid course flight of the missile ,guidance would be provided by millimeter-wave radar or Synthetic aperture Radar(SAR),while for terminal phase of missile ,guidance would be provided by millimeter-wave radar or (IIR) passive imaging infra red seeker. The Second Artillery has also completed at least one technical requirements assessment on a CO2 guidance coherent laserimaging radar for ballistic missile terminal guidance.
http://project2049.net/documents/chinese_anti_ship_ballistic_missile_asbm.pdf
http://www.chinasecurity.us/pdfs/others/Hagt&Durnin.pdf
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
Mid-course guidance is through Inertial Navigation System (INS) & while it's terminal phase may have active/passive homing seeker.A Global Positioning System (GPS) has also been made to complement the navigational data computed by INS. GPS is based on an array of low-earth NAVSTAR (NAVigation Satellite Targeting & Ranging) satellites. Computers onboard the missile, communicate with the satellites to accurately determine their instantaneous location.However the US monopoly over NAVSTAR satellites means signals can be "degraded for other users" by United States at their will. India would involve itself in future with the rapidly expanding Russian GLONASS GPS project or other suitable alternatives in terms of scientific collaboration or financial resource sharing.
WHAT
So Brahmos2 guidance system looks far more Simple & effective in such a short range as compare to DF 21D AsBM's guidance sytem which looks far more complicated & prone to misintepretation of target accusation at such long range
4.WARHEAD
DF 21D ASBM :
It can carry both conventional & tactical nuclear warheads ,but use of tactical nukes may not be done due to fear of inciting nuclear war .DF 21D ASBM are equipped with a conventional warhead which is a Manoeuvrable Re-Entry Vehicle (MaRV) large enough, together with the kinetic energy, that a single hit has the potential to cripple or outright destroy a supercarrier, but unlike nuclear weapons have to hit the target precisely to be effective.The missile would also be carrying decoys & other ABM counter measures with it. It may also include Manuvering independently targeted Re entry vvehicle (MIRV)warheads in future missiles .Chinas military is developing electromagnetic pulse weapons and high-powered microwave (HPM) weapons that Beijing plans to use against U.S. aircraft carriers in any future conflict over Taiwan, according to an intelligence report made public on Thursday. Richard Fisher, a China military analyst, said EMP warheads are likely to be an option for Chinas new DF-21D anti-ship ballistic missile for the purpose of attacking large U.S. Navy ships without inflicting immediate massive casualties.
DF-21 - Wikipedia, the free encyclopedia
PLA Ballistic Missiles
China’s Anti-Access Missile | Flashpoints
Report: China building electromagnetic pulse weapons for use against U.S. carriers (Article)
Report: China building electromagnetic pulse weapons for use against U.S. carriers - Washington Times
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
The ship-launched and Sub based missiles can carry a 200 kg warhead, whereas the aircraft-launched variant can carry a 300 kg HE conventional warhead. The high speed (mach 6-7) version of BRAHMOS 2 missile provides better target-penetration capabilities than the supersonic brahmos I cruise missile due to higher kinetic energy than it's predesscor
Brahmos Supersonic Cruise missile
BrahMos Supersonic Cruise Missile - Army Technology
Brahmos Missile - a knol by Vijainder K Thakur
So in terms of warhead DF 21D ASBM is far more powerful & devastating than Brahmos 2 .So a single DF 21D ASBM is capable of sinking a supercarrier while 2 or 3 brahmos II HYPERSONIC ANTI SHIP CRUISE MISSILEs would be required for sinking a supercarrier.
5.SPEED
DF 21D ASBM :
The DF-21 can hit it's targets in terminal phase at speeds of Mach 10- 11, which is high hypersonic missile.so Thermal control becomes a dominant design consideration. Structure must either be designed to operate hot, or be protected by special silicate tiles or similar.
DF-21 - Wikipedia, the free encyclopedia
Hypersonic speed - Wikipedia, the free encyclopedia
BRAHMOS 2 HYPERSONIC ANTI SHIP CRUISE MISSILE:
BRAHMOS 2 would have a maximum speed of (MACH 6-7) i.e 6-7 times the speed of sound.For this new materials to withstand high temperature and vibrations are being developed.
India, Russia work on hypersonic stealth cruise missile - Home » Other Sections » Breaking News
So DF 21dAsBM has much higher speed than Brahmos 2 at it's terminal stage giving it higher destructive power & more difficult
to intercept due to high speeds than brahmos 2