@HEMGroup And in the 2nd stage flight, notice how I can detach the bus from it even tho the motor is clearly not depleted yet? That's because to prevent the 2nd stage to overshoot the impact zone away from the target, I have a motor inside the tank which is identical to the motor propelling the second stage but facing the opposite way therefore stopping the acceleration of the 2nd stage and allows the bus to safely separate.

@HEMGroup The problem with the TVC is the motor is attached to a small disc of a fuel tank so if I made it work like that, the burn time would be below a second and that's the reason it can't draw fuel from the actual fuel tank containing the solid propellant. So Each of those engine has been tweaked so that they burn for 60s for the first stage and 80s for the 2nd stage to make it work like a normal rocket would.

@OverCAT83 That's true,
this could be one of the reasons.
But the new missile I'm developing has an impact speed of about Mach 9, and even so, if it doesn't maneuver inside the atmosphere, Trition's SAF could destroy it (although, this is assuming the missile is at least 60 kilometers away at launch).

@OverCAT83 Oh,
I didn’t see this type of TVC in your missile and thought you were controlling it with a gyro.
You’ve really done an impressive job!
I wanted to do this using fins installed outside the engine and in front of it (so that the exhaust gases would hit those surfaces and change the thrust vector), but it didn’t work.
That was truly a clever move!
Just one question:
What’s the purpose of that second engine you placed facing upwards (both in the first and second stages)?

@EhsanA if I made a RSS icbm it would probably be harder to intercept at re-entry I guess

@TritonAerospace Of course, some missiles also correct their trajectory outside the atmosphere using a small engine they have.

@EhsanA A better reason why you could hit me tho is the distances covered in juno are tiny compared to irl earth which if earth has greater distances, it could also mean the warheads are traveling way faster than what you can achieve in juno therefore easier to track.

@OverCAT83 @OverCAT83 Yeah, that's right.
Usually, MIRVs don't have control surfaces, and in the real world, due to their extremely high speed, intercepting them is practically impossible. But in Juno, since I can track your position even from 1000 km away, I can hit you, which reduces Juno's realism a bit.

@TritonAerospace I yearned for a tvc solid motor in the game until I found a guy in the crafts section that built one using rotators and pistons as actuators and then finally I was able to make a more authentic ICBM. The integrated thrusters are cool but I thought if this was IRL that it's IR sig could be increased greatly by using those to control the missile so I only use them for roll instead of all axes. Thanks for you too since when I was at Golden's post I saw your comment about making one and that's where it began.

you are guiding it all the way as well.
genius way of integrating roll and pitch thrusters in the missile body.

@OverCAT83 good work, this is impressive.

@EhsanA No I have not tested it against ABMs yet. Maybe I'll do that once I have solved the lead issue. I think most MIRV don't have a control surface but rather they just stabilize themselves by inducing a spin to them after release. In my case here I have a gyro on the back of the warhead that keeps it pointing prograde for the least drag loss during re-entry.

@EhsanA I thought it was just the planets rotation that caused that but if the rotation velocity is already induced before launching and as long as you don't alter the horizontal velocity it should theoretically land back at the same place but what you said is true so the effect is there. Maybe GoldenShadow's code accounts for that too already but I don't understand it well enough all I know is it accounts for rotation but it could also have it.

@OverCAT83 Yes, it exists.
If you launch a rocket straight up, completely vertical, and it reaches an apogee of, say, 1000 kilometers, you’ll notice that it doesn’t come back to the same spot it was launched from. That’s due to the Coriolis effect.

@OverCAT83 You’ve done really creative work—congratulations!
So, you’re only performing corrections in the Midcourse phase, and yet you’re achieving remarkable accuracy, considering that warheads lack aerodynamic surfaces for correction within the atmosphere.

Have you tested its effectiveness against anti-ballistic missile systems?

@EhsanA Also does the coriolis effect exist in Droo?

@EhsanA In boost phase, it only is heading at the target with no correction at all. Once the target is <1800km away, the maneuver starts which is using GoldenShadow's impact prediction code as a point to align with the target position by creating a vector towards them and projecting that vector towards my plane which results to a very accurate alignment because GoldenShadow's code accounts for rotation of the planet, there's four stages to the maneuver: 1st, is it just makes a broad adjustment to the distance of impact point to the target position. 2nd, once the distance between is below 30km, it switches to vector that is not in plane with the bus but to the to the vector pointing from the impact position to the target position which results in even higher accuracy that is needed. 3rd, once distance is at 5000m, the bus starts to rapidly throttle down as at these ranges it becomes very sensitive to large velocity changes until it reaches 550m, then I switch to using RCS to further decrease the distance to 30m. 4th, after reaching 30m, it locks heading directly to the target and exexutes a lead burn which is the final touch to making the warhead actually hit but as I said in the post, its still quite a problem I'm solving so when that gets ironed out, you should be able to get a approximate CEP for this but for now its up to the input lead which is a guess everytime and not ideal at all.

Can I ask what the purpose of the warhead bus maneuver is?
Is it because the Earth's Coriolis acceleration wasn't accounted for during the boost phase?

@IcEStaR Thanks for that, I should've put a spin on them way before I started on the vizzy itself but I got lazy so time to do that now. For the trajectory, making it too steep doesn't really make it feel good to me like the path it takes just feels more awkward but maybe that's because Droo is smaller than earth and I prefer using depressed trajectories to delay detection time greatly but it comes at the cost of drag which I am willing to find a solution for. The range between across the planet for a lead adjustment is around 1-7km and there's should be a math for that. Thanks for the feedback I'll definitely try the spin.

To improve the accuracy of warheads you can twist them around their axis to create a gyroscopic effect.
Also I think to minimize the effect of atmosphere on warhead accuracy (and to counteract missile defense systems xD) you can increase the apogee (make the trajectory of the warhead very steep), in this case the warhead will have more speed and kinetic energy. I think this should help..
Looking forward to the next modification :)