What do SMA and INC in persistant.sfs mean ?

[Gaarst]

Pretty straightforward: I've noticed that in one of my saves that was a lot bugged (seems to be better now, don't ask) I had quite a few of these values set to NaN.

I think this might be a cause of the bugs I had, so I would like to replace them to actual values. Any idea on their function or suitable values are welcome.

(SMA and INC found under VESSEL{ORBIT{)

[Starhawk]

Sounds like semi-major axis and inclination to me.

Don't how the values are stored, sorry.

Happy landings!

[JTpopcorn]

Pretty sure those need values, my approxamitly geosync satellite has the following-

ORBIT
            {
                SMA = 15240608734.904
                ECC = 0.109160551969558
                INC = 2.87223661217377
                LPE = 2.1172891567035
                LAN = 261.773338496634
                MNA = 6.22770564976797
                EPH = 2043585.75608398
                REF = 0
            }

I assume INC is inclanation or the slant of the orbit, and no idea about SMA, it isn't altitiude, at least not from kerbin.

[Arsonide]

SMA: Semimajor Axis, which is the average of your periapsis and your apoapsis.

INC: Inclination, one of many angles that describes an orbit, it's basically how far the orbit is tilted in relation to the equator.

[Gaarst]

Why didn't I think of this ? ... It seems so obvious now... 

Anyway, any idea on what could cause these values to NaN, considering they belong to crafts that are landed or orbiting, and very controllable (the NaN Krakens I had were upon launch only) ? Could RSS have something to do with it ?

[Vive_moi]

7 hours ago, JTpopcorn said:

I assume INC is inclanation or the slant of the orbit, and no idea about SMA, it isn't altitiude, at least not from kerbin.

HI,

The Semi-major axis is not the altitude from the ground, but the "altitude" from body center. So, SMA = body radius + altitude.

Vive_moi

[kurja]

I'd guess they would be NaN when vessel is landed?

[numerobis]

LAN and LPE can go nuts when you've got a circular orbit (since they aren't defined).

For some reason the inclination of your orbit versus another is displayed as NaN when it's too close to zero. So I could see INC being stored as NaN.

I don't get why SMA would go to NaN.