<?xml version="1.0"?> <param xml:id="earth_lon_hee"> <get> <vi name="earth:orb:all"> <baseParam name="HEE"/> </vi> </get> <process description="LON HAE">atan2($earth_orb_all_HEE[1],$earth_orb_all_HEE[0])*RAD2DEG</process> <output/> </param>