Title


Manual Version 1.4



Mars/Deimos Approach Tutorial


The begin point of this tutorial is distributed with InterplanetaryMFD. Scenario "MarsApproach"




DeltaGlider is approaching the Mars at hyperbolic transfer orbit and we want to reach the Deimos. At first we must plan the course correction and syncronation with the Deimos. One good starting point is that we set the node to periapis. Making the plane change at current node position may not be a good idea. However it is possible and it is not a wrong way to do that. I assume that there are no right or wrong way to do that there is only a good way and not so good ways.


Let's start the P2 program first setting the target "Deimos" and selecting "apsides" mode. Close the program. Then we setup P3 transfer program. Select "Distance" operating mode and setup 23500k as an distance. Screen shot is below.




Close the P3 program. Then we must setup program flags. Turn the page by pressing (PG) button. Press (Drw) and (Int) buttons to enable orbit drawing and select witch program we use to calculate intersections.

Press (Int) button on Map Display to setup interception mode to Apoapis "Ap"

Select P2 program by pressing (Nxt) button and press (Edt) button to edit it.

Decrease PeD and adjust LPe so that you will intercept the Deimos at apoapis as shown in a picture below.

It's time to start flight plan. Execute P2 burn. Delete P2 program after the burn is completed.
Make P3 burn as planned and delete the program.

You may need to make a little final correction depending how close to deimos you want. This correction can be made with P2 set Apoapis and Apsides modes. Don't forget to setup the target "Deimos".  Adjust ApD and LAp.
Correction burn image is not shown

When you are close to Deimos match the velocity with the Deimos. Plane change will be made during the Match burn. That will also circulate the orbit. Velocity Match will be found from Orbital programs.





(c) 2003 Jarmo Nikkanen
jarmonik@mbnet.fi