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IWR6843AOPEVM: How to convert the estimated angle into the value of the coordinate system

Part Number: IWR6843AOPEVM

Hello,

Now I can use the four data blocks 12, 10, 8, and 6 for horizontal angle estimation, and the four data blocks 4, 3, 12, and 11 for vertical angle estimation. If I understand correctly, the estimated horizontal and vertical angles are the angles between the normal lines perpendicular to the antenna surface, which means that the estimated horizontal and vertical angles are consistent with Figure 2 θ The angles are similar, I can't come up with something similar to Figure 2 Φ Angle, for Figure 2 Φ Can I obtain the horn? Or how can I draw a 3D coordinate map of the target point?

Regards,

Gary