When we run sUAS instances on the HPC cluster, it's often better to scale horizontally such that we deploy numerous sUAS engines with a small number of drones. This is better than deploying small number of sUAS instances where each has a large number of drones. For example, it's better to have 10 gazebo instances with two drones each instead of two gazebo instances with 10 drones each.

This way each job is more likely to work as each job needs fewer ports.

Therefore, we'd like to update the sender and receiver so that it's possible run more than one gazebo instance and have the updates show up in AirSim.