Flight Question Double burn ejection planning

[Wishbone]

When reading the Mars Design Reference Architecture 5.0 discovered that all transfers will use double-burn technique to minimize gravity losses. That is, first burn is done from a 407 km circular orbit to raise apogee, after an orbit, another burn to eject the craft. How do I plan this with Orbiter's tools other than seat-of-the-pants feeling?

 

[Kaito]

Assuming you're using TransX, this is what I would do:
Plan the full route using a single burn. Then lower the prograde until you are in a highly elliptical orbit. Burn it. Then, turn maneuver mode off then on, and then re-plan for the rest of the trip.

Thats how I would do it, not sure if that's the right way

 

[Evil_Onyx]

I would think it would be, plan a 1 burn ejection to get the position for your 1st burn then cut it short (to stay in orbit), so when you come back round you are in the right place for your ejection burn.

At least that is how i would do it in orbiter.

:edit:

:ninja:
too slow.

 

[Urwumpe]

First calculate how far you can raise the orbit, and how much DV this brings you. Note the orbit period of the immediate orbit.

The calculate the eject burn as normal.

One immediate orbit period before ejection burn, you do the planned burn into the immediate orbit, then during the immediate orbit, refine your solution for the eject burn.

 

[LuckyHendrix]

I'm trying to accomplish something similar, but with four burns instead of two. I haven't learned TransX yet and thus I tried to use IMFD in orbit eject mode , burning each time I passed around my periapsis. but so far I've only managed to reach my ejection velocity but with not enough fuel left for the course corrections. Is there anyway I could plan my burn to be more efficient ?