Question on orbit calculations

[ar81]

I tried to follow the vector math to calculate orbit parameters from scenario data, as presented in Orbiter manual. For some reason formulas do not work. Any help would be appreciated.

 

[agentgonzo]

What formulas are you using. Where do your calculations go wrong?

 

[ar81]

The vector formulas from Orbiter.pdf about orbital elements.
Those vector formulas do not work.
Now that I come to think... Does it have to do with DirectX being left handed? Do I need to left hand all vector formulas?

 

[Urwumpe]

If you use orbiter coordinate systems: Yes.

 

[James Cloninge]

The vector formulas from Orbiter.pdf about orbital elements.
Those vector formulas do not work.
Now that I come to think... Does it have to do with DirectX being left handed? Do I need to left hand all vector formulas?

Just swap your Y and Z coords to convert from right-hand to left.

 

[tblaxland]

There is also a solid right hand implementation of those formula in [ame="http://www.orbithangar.com/searchid.php?ID=3825"]KOST 0.5[/ame] and a discussion where cjp had the same problems here: http://www.orbiter-forum.com/showthread.php?t=4605