a lighter than air balloon to support {TAIL ~ said station} uplifted in {HEAD ~ the air}, 
a lighter than air balloon to support { TAIL ~ said station } uplifted in { HEAD ~ the air } ,
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH