Neither one will work for getting an "aim".
This not like aiming a Directv or Dishnet one-way receive only DBS TV dish.
You will NEVER hit a satellite sized target 22,300 miles away with a pencil sized transmit beam.
Rough reckoning: Due south is 90". ViaSat-1 is located at 115.1' W.
Because of the transmitter the FCC requires qualified installers to aim your transmitter.