Lon Lat Yaw Pitch Roll conversion into VBS4 using the DIS protocol

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I have the lon, lat yaw pitch roll of an aircraft which i need to forward into VBS using DIS to display the object.

example data: Lon: 2.0445459 Lat: 12.4195886 Yaw: 180 (degree) Pitch: 0 Roll: 0

The input required using DIS Entity Orientation takes Psi: Theta: Phi:

Could someone please help explain what conversions are taking place to get to the required input, if i read DIS out of VBS at this location i can see: Psi: 0.0554486

Theta: 1.3575 Phi: -3.1214

I take it there are some rotations happening (from researching the mind field online) but i am new to 3d modelling and haven't worked with this before, so i dont understand the process of going from one set of data to the other.

Many Thanks

I havnt tried anything as i dont know where to start

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