What EPH means in .sfs file?

[Hannu]

I am doing orbital planning software. I want to be able to read ship's data from .sfs file and select one of them as an initial orbit. Fortunately, .sfs seems to have very self explanatory format, but I have couple of questions.

What "EPH" means in orbital parameters (ORBIT {})?

What are "REF" codes? I know that they tell orbited body, but what numbers corresponds to bodies?

[Boomerang]

Everything you want to know:

http://wiki.kerbalspaceprogram.com/wiki/Orbit#Orbits_in_the_save_file

[Hannu]

Thank you. That was exactly what I wanted to know.

[Drew Kerman]

don't forget MNA is in radians, and sometimes LAN is given in normalized -180 to 180 degrees

and as far as orbital planning software goes, make sure you're not re-inventing the wheel

Edited October 10, 2014 by Gaiiden

[Hannu]

I know that Trajectory Optimization Tool exists but I prefer slightly different point of view. And this is also fun project as itself, when I get bored to playing. I like to program mathematical stuff.