I am skeptic about this news lets wait
In 2013 a combined team from IAI and Russia’s JSC Almaz-Antey MSDB made an unsolicited presentation to the IAF on an improved version of the S-400 ‘Triumph’ LR-SAM (a generation ahead of what has been sold to China) that would make use of IAI’s latest EL/M-2090U UHF-band active phased-array LRTR, the IAF began making hectic plans for procuring such a system for TMD within the foreseeable future.
Presently, the S-400 makes use of four different types of supersonic endo-atmospheric interceptor missiles (top speed of 4.8km/second): the 40N6E, the 9M96E2, the 48N6E3 and the 48N6E2, all of which are armed with HE-fragmentation warheads. What Russia has proposed for the IAF are two HYPERSONIC missiles, the exo-atmospheric 77N6-N and the endo-atmospheric 77N6-NI, having top speeds of 7km/second and also being the first SAMs of Russian origin to possess INERT warheads, i.e. warheads that do not contain any explosives and instead, are ‘hittile’, meaning they will destroy inbound TBMs, IRBMs or MRBMs by sheer force of impact.
The most revolutionary element of the 77N6-N and the 77N6-NI hypersonic LR-SAMs will be their on-board nose-mounted, Ka-band millimeter-wave active phased-array radar seekers and their real-time discrimination algorithms required for fire-control and guidance of hit-to-kill interceptors. To this end, the radar seekers have been designed with a rigid mount and narrow beam to provide precise angle metric accuracy. The combination of metric accuracy, wide bandwidth, and high Doppler-resolution capabilities makes them excellent sensors for real-time discrimination, for they can provide extremely accurate identification-processing estimates of motion differences caused by mass imbalances on real and threat-like targets.
The 300-tonne EL/M-2090U ULTRA C-22 LRTR features an array of 22 UHF-band transmit-receive modules (TRM) in a single clustered unit that has been designed so that modules can be easily swapped. Using UHF, rather than the higher frequency bands, has particular application at long ranges since it suffers from less signal loss in the atmosphere. A discriminating innovation of the ELM-2090U is the digitisation of the signals at the TRM-level, which allows more flexibility in beam-forming and shaping. For TMD along a sectoral footprint, IAI has developed the EL/M-2090U’s ULTRA C-6 version, which has six TRM clusters. Each cluster can electronically steer its beam through +/-60 degrees in azimuth and across a 40-degree sector in elevation. In all cases, the array can be mechanically tilted through 30 degrees in elevation to provide a total elevation coverage of 70 degrees. The larger C-22 version comes mounted on a rail assembly that can be mechanically slewed through +/100 degrees to give 320-degree coverage.
As per the IAF’s projections, there exists a requirement for 12 Batteries of the S-400 (each Battery using four TELs each housing four cannister-encased LR-SAMs), plus 12 C-6 LRTRs and two C-22 LRTRs. In other words, as per the IAF’s appreciation, a total of 11 strategic sectors are required to be protected against inbound TBMs, IRBMs and MRBMs.
But does this all mean that the procurement of S-400 LR-SAMs is a foregone conclusion? Absolutely not. Significant questions still remain over the yet-to-be-demonstrated effectiveness of the hypersonic 77N6-N and the 77N6-NI missiles. In addition, a lot will depend on Russia’s ability/inability to ramp up series-production of such missiles over the next five years. Also, exercising the Russian option means that India will have to invest cost-prohibitive financial resources on deploying a network of space-based early-warning satellites, since Russia has diminished capacities in this arena. But most importantly, the US is not sitting by and let Russia and Israel have the cake and eat it as well. Since 2012, the US has been taking keen interest in India’s plans for acquiring exo-atmospheric/endo-atmospheric interceptor missiles, especially after the latter officially decided not to field a new generation of solid-fuelled tactical ballistic missiles—be they conventionally armed or nuclear-capable—for replacing the liquid-fuelled Prithvi-1 NLOS-BSMs of 1990s vintage. What this essentially meant, was that unlike Pakistan, India will not use ballistic missiles of any type that are conventionally armed, since such weapons have zero counter-force/counter