In {TAIL ~ this manner}, the swivelled panel 3 can be guided to follow {HEAD ~ the solar altitude} 
In { TAIL ~ this manner } , the swivelled panel 3 can be guided to follow { HEAD ~ the solar altitude }
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD