[Rugged Users] Direct location- frames

[<vfonsny@gmail.com>]

Hello,

I'm trying to use the direct location but I have some trouble with the frames.
In the tutorial, it is said that the line of sight of the sensor has to be
given in local frame such as X is the velocity, Z points towards the Earth and
Y is fixed to have a right handed coordinate system. I suppose that the
positions and velocities used are those in the inertial frame.
Thus I thought that with a rotation equal to the one given by the transform
from the inertial frame to the non inertial one and raws directions with  the
values:
(0, [a range of near 0 values ], 1) the spacecraft would always sees
the Earth. It is not the case and I can not find how I have to define the
rotation. Can you tell me what is wrong ?

Thank you.