u/Acox565

Our locality is working on building out a command trailer for our public safety drone operators to sit in to fly without the outside distractions of an incident. How are agencies increasing the transmission distance of their DJI (or other drone manufacturers) distance when inside the enclosed trailer? We have done several tests and have significantly decreased transmission distance when flying from inside. Are there external antennas that can be mounted on a trailer ? Looking for ideas from other agencies that have encountered this problem. We currently operate a DJI M30T