Single Startup process:
cd ~/catkin_ws source devel/setup.bash source devel/setup.sh cd src roslaunch comp_cov_sim comp_cov_sim.launch gui:=true (or false, for no gui)
Setting the real time factor: in the empty.world file, change the real time factor.
Setting multiple ros masters and gazebo servers: in each terminal: export $ROS_MASTER_URI=http://localhost:11311 (or any other port) export $GAZEBO_MASTER_URI=http://localhost:11345 (or any other port) in the ROSLAUNCH call, add "--port=11311" in the end, for the ros master uri.
Running simulations via script: Run "./Set.sh", and enter the desired number of simulations