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