Simulate 430 linefeed gain vs za


    The 430 MHz line feed on the carriage  house illuminates the 1000 foot dish when the ch is at za=0. As the ch goes up in za, the illumination on the dish spills over onto the ground/ground screen. Since the gain is proportional to the illuminated area (assuming uniform illumination) the gain will also go down. To figure out how the spillover increases with za, a simulation was done. This simulation used:
The plots  show the change in area (gain) as a function of za. (.ps) (.pdf):


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