VAR_x := 2.0 * (NCAD6VL2.raw * NCAD4NE3.raw - NCAD6VL1.raw * NCAD4NE2.raw);


if abs(VAR_x) < 1 then
		return(arcsin(VAR_x)*180/3.1415926);
else
		if VAR_x <= -1 then
		return(-90);
		else
		return(90);
		elseif;
endif;