See Proba-V http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/Proba-V_maps_world_air_traffic_from_space http://www.esa.int/Our_Acti

See Proba-V http://www.esa.int/Our_Activities/Space_Engineering_Technology/Proba_Missions/Proba-V_maps_world_air_traffic_from_space http://www.esa.int/Our_Activities/Space_Engineering_Technolo...