Let me give you the gist what Prasun Sengupta replied
1) Presently, the Indian Army is authorised by the Ministry of Defence (MoD) to have a total of 81,206 ATGMs, with each infantry battalion deployed in the plains being armed with four medium-range (1.8km-range) and four long-range (4km-range) ATGM launchers (each with six missiles), and those in the mountains have one of each type along with six missiles for each launcher.
2)In reality, however, the Indian Army’s total existing inventory of ATGMs now stands at only 44,000 that includes 10,000 second-generation MBDA-developed and Bharat Dynamics Ltd-built SACLOS wire-guided Milan-2 ATGMs and 4,600 launchers; 4,100 second-generation MBDL-supplied Milan-2T ATGMs; 15,000 second-generation 4km-range 9M113M Konkurs-M SACLOS wire-guided ATGMs licence-built by BDL, plus another 10,000 that are now being supplied off-the-shelf by Russia’s JSC Tulsky Oruzheiny Zavod.
3)The Indian Army had zeroed in on the third-generation FGM-148 Javelin as far back as 2008 after it had conducted in-country summer user-evaluations of the RAFAEL of Israel-built Spike-ER ATGM. During these evaluations, seven out of the 10 missiles fired missed their targets because their on-board uncooled long-wave infra-red (LWIR) sensors failed to distinguish their targets from their surroundings (an identical problem had also beset the Nag ATGM’s uncooled LWIR sensors during user-evaluations). In contrast, the Javelin uses a cooled mid-wave IR (MWIR) sensor that can passively lock-on to targets at up to 50% farther range than an uncooled sensor, thus allowing the firing crew greater and safer standoff distance, and less likely to be exposed to counter-fire.
4)The uncooled sensor is not only less reliable, but its long-LWIR spectrum is only compatible with a dome made of softer materials that vulnerable to abrasion in harsh environments (e.g. deserts) and consequently require replacement more often. The cooled seeker’s MWIR spectrum allows a durable hardened dome, and it is better than LWIR in discerning threats in certain geographic locations or environmental conditions. An uncooled sensor thus brings increased repairs, decreased operational availability, and dangerous vulnerabilities, while a cooled IIR sensor saves lives, lessens fratricide, minimises collateral damage, lowers risk, and protects its firing platforms/crew.
5)When the then US Deputy Secretary of Defense, Ashton Carter, arrived in India on September 16, 2013 for a two-day visit, he came equipped with a proposal aimed at dramatically boosting US-India military-industrial relations. The proposal called for 1) licence-production of the FGM-148 Javelin through 97% transfer of manufacturing technology, but withholding the target recognition algorithms of the MWIR seeker (meaning the seeker’s focal plane array sub-assembly would have to be imported off-the-shelf from Raytheon). 2) co-developing with the DRDO’s Research Centre Imaarat (RCI) and its associated Sensors Research Society (SRS) a fourth-generation version of the Javelin that will feature a dual-mode seeker, hyperbaric warhead, and a longer range of up to 4km.
Here lies the problem
6)What was highly perplexing was that the KRAS JV was openly announcing its ability to produce Spike ATGMs when even the MoD had not inked any contract for procuring the Spike ATGMs. It is from this juncture that the ‘desi’ patrakaars’ went on an overdrive to peddle the story about the Spike ATGM’s procurement. Here are some examples of such rumour-mongering:
THIS IS INDIA's SOLUTION
7)In reality, the DRDO has since 2012 been co-developing a third-generation MPATGM along with VEM Technologies. The RCI has since then developed the all-composite rocket motor casing, MEMS-based redundant micro-navigation system (RMNS), as well as a new-generation IIR sensor that employs semiconductors using indium gallium nitride and aluminum gallium nitride alloys for the RCI-developed 1024-element staring focal plane arrays operating in the ultra-violet bandwidth that give better solar radiation rejection. User-evaluations of the definitive MPATGM are expected to commence next year, with bulk production commencing sometime in 2020.
7)
Answer has been provided please see above . Spike actually failed in trials so India is developing her own with Seeker from USA.
Sorry the Seeker in the MPATGM will be from India the IIR sensor that employs semiconductors using indium gallium nitride and aluminum gallium nitride alloys for the RCI-developed 1024-element staring focal plane arrays operating in the ultra-violet bandwidth that give better solar radiation rejection.
