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<?xml version='1.0' encoding='us-ascii'?> <param xml:id="stb_b_rtn_phi"> <get> <amdaParam name="stb_b_rtn" /> </get> <process>180+RAD2DEG*atan2(-$stb_b_rtn[1],-$stb_b_rtn[0])</process> <output /> </param>