model://sun model://ground_plane model://asphalt_plane base_link 4.0 20.0 0 0 1 0 0 0 0 0 20.0 0 1 0 0 0 world_wind 0 0 -9.8066 quick 10 1.3 0 0 0.2 100 0.001 0.004 1 250 6.0e-6 2.3e-5 -4.2e-5 0 0 0.1 0 0 0 model://drone1