QRSAM = AAD + Astra (of course, that of Trishul).
So it is indeed tri shul.
Has moustache/canard , TVC (not yet confirmed) of AAD.
Midbody wings & core tech of Astra. I think.
QRSAM = AAD + Astra (of course, that of Trishul).
Saurav Jha @SJha1618 12:17 PM - 11 Jul 2017Agni-I, Agni-II and Agni-III are fully operational. Agni-II will be progressively replaced by the Agni-IV which is also there with the SFC.
As far as the so called MIRVed Agni-VI is concerned, a lot of development work on it was done and it is a 'screwdriver' away from testing.
I've mentioned this a number of times but generally, for higher freq. RCS optimized configurations the lower the frequency or larger the wavelength the better you can detect those aircraft. So if that is the metric, L-band is going to get you better results. But even besides that, L-band is a better surveillance frequency as you can more efficiently cover larger areas for the surveillance mission. For long range surveilance it is practically the frequency of choice around the world whether that is for military or commercial applications.Austin wrote:Any radar gurus can explain why Barak-8 has chosen S Band Radar while GreenPine is on L band , Does S band offer better capability to detect LO targets over L Band , Any information on adv and disadv of S and L Band ?
The same reason why our ships carry two radars - RAWL L Band and Elta/Fregat S Band.Austin wrote:Any radar gurus can explain why Barak-8 has chosen S Band Radar while GreenPine is on L band , Does S band offer better capability to detect LO targets over L Band , Any information on adv and disadv of S and L Band ?
good idea, I think GOI may already wasted few millions on MaitriThakur_B wrote:Time to dump the Maitri project and Embrace qrsam as the new trishul.
Karan M wrote:R-sir, QRSAM is pretty much the new breath of Trishul - or so I feel. It may become a tri-service missile.
SRSAM aka Maitri aka French Mica with DRDO radar is all but cancelled. For Navy. So QRSAM may take over until & unless IN insists on VLS missile which might require reengineering or new design.
QRSAM is now going great guns. For IA.
IAF is using Akash as its SRSAM system and will get 1S and NG variants. However, I feel they may take the QRSAM as well because its more mobile, and compact and hence easily deployable, survivable.
Trishul IMHO can be brought back purely as a gapfiller system to take out PGMs and CMs as a cost effective round. It has limitations otherwise being a command line of sight, system and not fire and forget. Also even in the above role, it can only take on a limited number of targets so not ideal
Any radar that is designed for any application is done considering the mission constraints. In a nut shell these involve surveillance volume, multi-mission demand, horizon search and yes target RCS. If you were to put a VHF radar on board a large vessel as the primary surveillance sensor it itself would have to carry a very large antenna to 'earn its place' which will probably only give you marginal benefits as modern solid state S band radars are increasingly getting better at covering larger volumes and rapidly shifting modes thanks to wideband gap materials and element level digitization. In fact if you see the trend, modern iterations AEGIS (processor upgrades) SPY-1 have essentially eliminated the need for the L-Band AN/SPS-49(V)9 and the SPY-6 further adds to this. The same trend is being seen elsewhere.Austin wrote:Thanks brar , tsarkar got what I wanted.
Was thinking why not move to meter band radar as primary long range survellence radar for ships , OK the size of antenna will be large but for ships of bigger size should not be a problem at all ? Something like S/Meter Band ?
EMF theory ; all things being equal (receiver , antenna and processing capabilities) the free space path loss increases with frequency so L band signal will suffer lesser attenuation , backscatter effects also increase with frequency so long story short for volume search lower frequency signals are employed and when target is close enough for better target and range resolution you employ a S or even X band radar .Austin wrote:Any radar gurus can explain why Barak-8 has chosen S Band Radar while GreenPine is on L band , Does S band offer better capability to detect LO targets over L Band , Any information on adv and disadv of S and L Band ?
Actually, higher power solid state and GaN materials help higher frequency sensors more provided you have the power and are able to remove heat since those are smaller space constrained antennas and the physical dimensions of the modules. On lower frequency sensors, individual PA performance isn't often the limiting factor, antenna size and overall logistical footprint is since they determine beamwidth so you can't shrink the radar down because your individual PAs are more powerful. Also for efficiency and size reasons you don't have to remove as much heat from the lower frequency radars.Well with the same digitisation and modern solid state benefit of better resolution and accuracy that has helped other radars , you can still get the same advantage for Meter band radar and you cannot beat physics when it comes to meter band in dealing with LO targets.
A lot of modern ships employ S and X/C band radars plus other combinations. The older suite on the Nimitz has an L and S band radar setup. The Ford has a Dual Band Radar Suite (S and X Band) - that does the same but uses just one Radar Suite Controller for both antennas. It is able to do this by having digital AESA based radar that can handle the surveillance tasks required thereby allowing them to remove the L band sensor.Here is INS Vikramaditya with S band Multifuctional radar FREGAT-M2EM and Air Survellence Radar PODBERYOZOVIK-ET1 operating C Band , The latter is interesting as it operates with 300 MHz to1 GHz
Yup this is it. Israelis have leveraged the excellent property of the S band to fashion a radar that provides both excellent volume search capability and precise fire control. This is a good trade off as opposed to maintaining a two radar set up which though optimal comes at a cost in terms of financial and logistical. Many others have made similar trades and this is a very good trade to make for a Multi-Function radar. The USMC has done a similar trade with their AN/TPS-80. The green pine on the other hand has to cover a much larger area given that it is a specialized BMD sensor. An S or X band radar option here would have made the sensor much much more expensive to develop, purchase and operate and performance would have been lower for a fixed SwAP-C dynamic. This is the TPY-2 dilemma where one had to choose between discrimination at all cost and sacrifice on cost, weight, power and other requirements (plus take a range hit). One advantage of a better discriminating sensor Is that you can remove some of the design constraints on interceptors given the better discriminating abilities of higher frequency radars. This is why the US Army prefers X band as a primary BMD sensor and are only willing to accept C band for cost and commonality reasons even if that leaves them a bit off when it comes to volume search and other features.negi wrote:Greenpine is a land based radar primarily for missile defense whereas Barak-8 might work with EL/M-2248 MF-STAR which has to be deployed on ships so real estate could be an issue too as for a given 'gain' aperture size increases with wavelength in use.
If the above is true, will we atleast now state the true range and not worry that it may bell the ring of western powers.Saurav Jha @SJha1618
As far as the so called MIRVed Agni-VI is concerned, a lot of development work on it was done and it is a 'screwdriver' away from testing.
India modernising Nuclear Arsenal with eye on China : US experts
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Thursday, July 13, 2017
By: TNN
Highlights
India's nuclear strategy is now focused on China, 2 US experts have claimed.
India is estimated to have produced plutonium for 150-200 nukes.
India currently operates seven nuclear-capable systems.
India continues to modernise its atomic arsenal with an eye on China and the country's nuclear strategy which traditionally focused on Pakistan now appears to place increased emphasis on the Communist giant, two top American nuclear experts have said.
An article published in the July-August issue of the digital journal- After Midnight - has also claimed that India is now developing a missile which can target all of China from its bases in South India.
India is estimated to have produced enough plutonium for 150-200 nuclear warheads but has likely produced only 120-130, wrote Hans M Kristensen and Robert S Norris in the article- "Indian nuclear forces 2017".
India's nuclear strategy, which has traditionally focused on Pakistan, now appears to place increased emphasis on China, the two experts claimed.
"While India has traditionally been focused on deterring Pakistan, its nuclear modernisation indicates that it is putting increased emphasis on its future strategic relationship with China," they wrote.
"That adjustment will result in significantly new capabilities being deployed over the next decade that may influence how India views nuclear weapons' role against Pakistan," they said.
Noting that India continues to modernise its nuclear arsenal with development of several new nuclear weapon systems, the two experts estimate that New Delhi currently operates seven nuclear-capable systems: two aircraft, four land-based ballistic missiles, and one sea-based ballistic missile.
"At least four more systems are in development. The development program is in a dynamic phase, with long-range land- and sea-based missiles emerging for possible deployment within the next decade," it said.
India is estimated to have produced approximately 600 kilograms of weapon-grade plutonium, sufficient for 150-200 nuclear warheads; however, not all the material has been converted into nuclear warheads, the article said.
Based on available information about its nuclear-capable delivery force structure and strategy, we estimate that India has produced 120-130 nuclear warheads, the article said adding that the country will need more warheads to arm the new missiles it is currently developing.
Kristensen and Norris said that the two-stage, solid-fuel, rail-mobile Agni-2, an improvement on the Agni-1, which can deliver a nuclear or conventional warhead more than 2,000 kilometres is probably targeted on western, central, and southern China.
Although the Agni-4 will be capable of striking targets in nearly all of China from northeastern India (including Beijing and Shanghai), India is also developing the longer-range Agni-5, a three-stage, solid-fuel, rail-mobile, near-intercontinental ballistic missile (ICBM) capable of delivering a warhead more than 5,000 kilometres (3,100-plus miles), it said.
"The extra range will allow the Indian military to establish Agni-5 bases in central and southern India, further away from China," the research article said.
If the map was drawn by me I would have definitely done, but most of these circle drawing and range finding websites only have these kind of map. anyways edited my previous post replacing the newer edition map with the older edition mapKarthik S wrote:Kakarat ji, kindly use maps that show J&K as part of India in entirety. If we ourselves start using these maps, people will forget that even PoK and Aksai Chin are Indian territories occupied by pakis and chinese.
The exact range of Agni V is known only to a select group of people, I have just used the widely mentioned range of Agni VKarthik S wrote:But isn't the range "more than" 5000 km.
More likely a single motor but 4 vectored thrust nozzles? sea harrier style?Indranil wrote:Although the shape of QRSAM has remained as that shown in DRDO tender, I am completely taken aback by the propulsion system. Obviously, it is a dual-thrust propulsion system. The lower part of the missile (like in Trishul) seems to be made of maraging steel, while the upper part is composite. But, four 4 separate motors for boost phase?
To add, our PAD/AAD use Greenpine/Swordfish LRTR L Band for long range detection and Thales Master T/MFCR S Band for tracking and fire control solution.Austin wrote:Thanks brar , tsarkar got what I wanted.
Was thinking why not move to meter band radar as primary long range survellence radar for ships , OK the size of antenna will be large but for ships of bigger size should not be a problem at all ? Something like S/Meter Band ?
You are most likely right about the 4 vectored thrust nozzles, but a single motor configuration. I don't think it is the Sea Sparrow style. It is more the minuteman configuration.titash wrote:More likely a single motor but 4 vectored thrust nozzles? sea harrier style?Indranil wrote:Although the shape of QRSAM has remained as that shown in DRDO tender, I am completely taken aback by the propulsion system. Obviously, it is a dual-thrust propulsion system. The lower part of the missile (like in Trishul) seems to be made of maraging steel, while the upper part is composite. But, four 4 separate motors for boost phase?
ramana wrote: Indranil, 4 nozzles in booster phase wont that add to the reliability concerns. Any one nozzle or motor underperforming is a big downer.
Philip wrote: http://www.defencenews.in/article/India ... rts-263165India modernising Nuclear Arsenal with eye on China : US experts
jamwal wrote:This article claims in missiles section that the launcher is pulled by a Volvo truck a d cites DRDO 2014 newsletter. Nothing about trucks is mentioned there.
http://idrw.org/agni-vi-indias-next-mis ... ore-141387Agni-VI: India’s Next Missile all set to Surprise the World ?
Agni-VI !!! What’s that? Never heard about it . were the actual words used by DRDO chief Dr S Christopher when asked by media about Agni-VI Program a few months back, while Government and DRDO continue to refuse to confirm or deny existence or development of successor of Agni-V, Chatter around seems to hint that India is just a few days or a few months away from surprising the world by testing China Centric Intercontinental ballistic missile (ICBM) in coming days. Agni-5 India’s first China Centric ICBM recently turned 5 and also underwent its fourth and final test-firing last year and will now undergo at least two user-trials by the tri-service Strategic Forces Command (SFC) before it enters full-scale production and induction, which has lead to wide-scale speculation among Defence and Nuclear analysts worldwide on possible debut of Agni-VI pretty soon . Former DRDO chief Vijay Kumar Saraswat in his tenure had confirmed that India had all the building blocks to develop a longer range and more capable missile then Agni-V and talks about MIRVs (multiple independently targetable re-entry vehicles) capable Agni-VI being under development as been speculated by both Indian and International Defence and Nuclear analysts for a long time now. DRDO usually has development gap between each Agni-series of less than 4 years and Agni-V turning 5 without any successor in sight suggests that Successor at least is ready in semi-knocked down condition which can be assembled in few days for its first debut test flight if given clearance from the top but since DRDO has been so tight-lipped about Agni-VI, it suggests that the final decision will be a political one and reasons to keep Agni-VI under wrapped, might be a Strategic one . Agni-VI with 6,000-7,500 km range and ability to carry a larger multiple independently targetable re-entry vehicles (MIRVs) payload capability over Agni-V will send shockwaves not only in Bejing but also in all European countries which will be put them under Agni-VI range. Speculation is also there that Upgraded lighter Agni-V might be tested with MIRV Capability with under reported range to pass it off as just an improved Agni-V to keep nerves calm in many countries with whom India is working in trying to secure its entry in the Nuclear Suppliers Group (NSG). All-composite Agni-V with improved components will make it significantly lighter than its current avatar and with MIRV warheads, Agni-V will lead to range extension of 1500-2000 km with a 1.5-tonne warhead and Chinese officials have already debunked Indian claim of 5500 km slated range of Agni-V and have said that it is capable of striking targets 8,000 km away with a lighter payload which technically could mean that with a full payload a lighter Agni-V might be able to strike over 7000km range and with light payload over 9000km and Agni-VI could be 10000km capable ICBM with reported range of 6000km . While DRDO has not made any effort to clear confusion on who will be successor to the Agni-V, Two Successor theories floated around by Defence and Nuclear analysts worldwide and also in India is that to keep heat off its Nuclear Missile program, India might introduce upgraded Agni-V with the same name but with minor design change or with an extensions like Agni-V+ or Agni-VPrime to maintain a low profile of the new missile even if it comes with MIRV warheads and increased range or it might finally reveal Agni-VI but with understated range .