The idea was to bring back the rockets/boosters safely and re-use them for next time. How SpaceX was able to achieve this? Intuitively there have to be multiple sensors recording and computer analysing the position or orientation of the rockets. What else goes into training the system? AI (Reinforcement Learning perhaps or just use of sensors to maintain the orientation?)
How entire system works in accordance with the natural way rockets used to return back on earth previously?