As an absolute amateur, the fixed wing aircraft/relay helo probably can't carry the equipment (big? satellite dish? that have to be aimed accurately?) to send i

As an absolute amateur, the fixed wing aircraft/relay helo probably can't carry the equipment (big? satellite dish? that have to be aimed accurately?) to send it to the satellite. The relay helo probably can't have LOS with the first truck all the time so the fixed wing plane is used to relay to the truck. The producers, where the signal needs to go to, want to sit at the finish line because that's also where the ceremony is located. I think most of complications come from the varying terrains blocking the signal path to the producers at the finish line.