Hi Thunder,

I know the BaseApproach program. Indeed, you can set an anticipation angle in re-entry mode.

The problem seems to me, that when you are closing in on Mars anywhere near it's SOI, that you're already much to close to Mars to modify the trajectory in such a way that the prefered anticipation can be realized with subtle corrections to the trajectory. It will cost a whole lot of delta-v to seriously change the trajectory and solve the problem at that very late point in time. So it seems the BaseApproach program does it's job, but some more planning has to be done upfront for better results (less delta-v).

Let's say the PeA of a certain trajectory happens to be right over the base. That means you have to go all the way around. Mars rotates in 24 hours. So if we would aim for an anticipation of 180 degrees, it would have been better to arrive 12 hours earlier or later. Then, we only need to go around half an orbit. Right?

So if we would have departed from earth 12 hours earlier or later, we would arrive with an anticipation of 180 degrees. We could also depart at the same time, but then with a slightly shorter or longer total transfer duration to arrive 12 hours earlier or later.

This is how I envision the problem. Not sure if it's correct though. I have to experiment with it.

I guess you know the wonderful Tutorial of IMFD with Dimitris and David?

Yes, I've studies all of their videos in detail. Very helpful to get started with interplanetary transfers. I am not sure whether the 'Map Method' which they demonstrate is only solution to this problem. It's a bit tedious. The charm of IMFD's course program is that you need only two numbers and I think the problem can be mostly solved by changing these numbers a bit.