PFSS+GCS = $\theta_{BN}$ angle

[MohamedNedal]

Hello,
I was wondering if the extrapolated magnetic field obtained from the PFSS model was merged with the GCS model here, Is it possible to estimate the "theta_BN" angle from the 3D mesh at a pre-defined number of points and show it on the 3D mesh?

NB. the theta_BN angle is the angle between the magnetic field line and the normal vector on the shock surface at that point.

[ZigongXu]

That could be possible because the GCS is based on the assumption of a flux rope and its geometry shape. But I am just not sure about the precision or the accuracy of that calculation. And GCS is for eruption situation while PFSS is assuming a quiet sun. Unless you could have the change of magnetic field with time, which as I know typically from MHD simulation, otherwise, I can not combine them together.