How to get the velocity vector of a vessel in the Global world?

[FreeThinker]

As the title suggests, how could I get access to a vessel real speed (not the current SOI) but the one in the universe? The value should remain the same when crossing the SOI between celestial bodies

My best attempt was this

        private double GetWorldVelocity()
        {
            var velocity = vessel.orbit.GetWorldSpaceVel();
            var iDepth = 0;

            var celestrialBody = vessel.mainBody;

            while (iDepth < 10 && celestrialBody != null)
            {
                if (celestrialBody.orbit != null)
                    velocity = velocity + celestrialBody.orbit.vel;
                else
                    break;

                celestrialBody = celestrialBody.referenceBody;
                iDepth++;
            }

            return velocity.magnitude;
        }

Although this better than standard velocity, there are still differences what it should be.

 

 

 

 

[sarbian]

vessel.orbit.GetFrameVel()