Now, what's in a battalion.
https://www.armyrecognition.com/russia_ ... ystem.html
Each battalion has a 55K6E command post, 1x central "Big Bird" radar for surveillance. A mobile mast is optional.
Fire control is provided by the "Grave Stone" Engagement radar, and upto 12 launchers can be added (we have 8x launchers). If this wants to be made more independent, we can have a 96L6E acquisition radar as a 3D search unit to back up the central Big Bird. In short, the 8x launchers can be split between 2x Grave Stones, each with a 96L6E and with the command post having the 55K6E + central Big Bird.
So lets assume IAF took a minimum option (just to conservatively see the figures) and we have:
5x regimental sets. 10x Battalions.
So that's 10x 55K6E command units, 10x Big Bird radars (with masts optional, which we will likely take, we even had them for our ST-68 U/M which too were S-3xx radars which we used independently as MPRs), 10x Gravestone radars, 80x launchers.
Considering each battalion as an independent firing unit, aka battery that's 10 firing units.
Now I dont think IAF will go for such a conservative loadout. You have 8 launchers per radar, each fire control radar can only scan/focus on one area if its set up for a BMD role. In effect, if you want to have BMD coverage + Air target coverage, and optimally utilize your launchers you can split up your battalions.
In which case, they would prefer to split each battalion into at least further 2 firing units for optimal flexibility, add a Grave stone radar per 4 launchers and give them a 96L6E for air search. In which case I wont be surprised if our order has:
10x Big Bird + 55K6E command post + 20x Grave stone radars, 10-20x 96L6E radars and 80 launchers. Missiles will be a mix of all types with max being the longer ranged ones.