Inaccurate landing produced by landing burn (~ 70 - 120m)

[PETEROLO291]

The trajectory is very exact and the mod works well, but the problem appears when the booster is in an inclined position, because when the landing burn starts will undershoot the target.

The way to solve it I think would be to calculate how much the landing brun is going to slow down in horizontal speed to make the booster initially overshoots the target so after the landing burn is pointiong on the target.

[oyster-catcher]

thanks for your comment. You are correct that the way to get accuracy is by taking into account how the trajectory is changed by the landing burn. In fact this is already fully taken into account for all burns and for aerodynamic drag and is especially important to do so for the re-entry burn since this is higher, the booster is more inclined and the trajectory to the ground will be strongly affected. If this wasn't done the predictions would be multiple km's wrong.

But I do share your disappointment that sometimes the accuracy is 70 - 120m out. The calculation I do should be perfect since it simulates using the same internal functions the game itself uses. But some vessels still seem to overshoot and some undershoot. I think the biggest cause of error is when the aerodynamic forces push one way and the rocket thrust pushes the other and this can cause the rocket to steer in the wrong direction and the error increase. If you see that happening then pull the gain slider to the far left so now steering will be attempted, then move it to the right again a bit later when the rocket is steering correctly and the error is reducing. Obviously this needs a bit of experimentation but its the best I can offer right now.

I'm SO impressed that SpaceX manage the accuracy they do in real life, having to content with wind etc... and a non-perfect simulation of the booster.

Thanks for trying out the mod. Your feedback means a lot.

[PETEROLO291]

Mmmm... Okay. But maybe more corrections while in landing burn, cuz it only tries to correct the path like 3s before touch down.

[PETEROLO291]

Hello?