An unmanned aircraft comprising: a camera; a laser ranging system configured to measure a distance to an object in a field of view of said camera; and a driving unit configured to rotate the field of view, said driving unit driving a rotary optical system (30A, 30B) which comprises said camera and said laser ranging system, to rotate around a rotation axis; characterized by further comprising a panoramic image data generating section, wherein said camera images a plurality of images at different rotation angles of said rotary optical system (30A, 30B), respectively, and wherein said panoramic image data generating section generates panoramic image data by combining the plurality of images, characterized by further comprising an azimuth detecting section; a relative height calculating section; a communication unit; a flight control unit; a control surface system; and a thrust system, in that the panoramic image data includes image data of the object, in that said azimuth detecting section detects an azimuth of the object based on the panoramic image data, in that said relative height calculating section calculates a relative height of the object to the unmanned aircraft based on the panoramic image data and the distance, in that said communication unit transmits the panoramic image data, azimuth data indicating the azimuth, distance data indicating the distance and relative height data indicating the relative height to an external system, in that said communication unit receives a flight control command from said external system, and in that said flight control unit controls said control surface system or said thrust system based on the flight control command. a camera; a laser ranging system configured to measure a distance to an object in a field of view of said camera; and a driving unit configured to rotate the field of view, said driving unit driving a rotary optical system (30A, 30B) which comprises said camera and said laser ranging system, to rotate around a rotation axis; characterized by further comprising a panoramic image data generating section, wherein said camera images a plurality of images at different rotation angles of said rotary optical system (30A, 30B), respectively, and wherein said panoramic image data generating section generates panoramic image data by combining the plurality of images, characterized by further comprising an azimuth detecting section; a relative height calculating section; a communication unit; a flight control unit; a control surface system; and a thrust system, in that the panoramic image data includes image data of the object, in that said azimuth detecting section detects an azimuth of the object based on the panoramic image data, in that said relative height calculating section calculates a relative height of the object to the unmanned aircraft based on the panoramic image data and the distance, in that said communication unit transmits the panoramic image data, azimuth data indicating the azimuth, distance data indicating the distance and relative height data indicating the relative height to an external system, in that said communication unit receives a flight control command from said external system, and in that said flight control unit controls said control surface system or said thrust system based on the flight control command.