Hello beavs2112!
The type of antenna is Andrew HPX 10-107. Diameter: 3020 mm, depth: 628 mm, focal lenght: 908 mm, f/D: 0,3
I think, in KU band the Invacom ADF-120 does not see the entire surface. The situation is the same in "C" band. The Chaparral scalar ring does not see the entire surface...