With Russian military hardware quite literally raining down onto the ground in Ukraine, it’s little wonder that a sizeable part of PCBs and more from these end up being sold on EBay. This was thus where [msylvain] got a guidance board from a 300 mm Tornado-S 9M542 GLONASS-guided projectile from, for some exploration and reverse-engineering. The first interesting surprise was that the board was produced in February of 2023, with the Tornado-S system having begun production in 2016.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/01/16/reverse-engineering-a-russian-tornado-s-guidance-circuit-board/