Lightweight visible light camera technology for weak space target detection

Abstract

Asteroid detection is of great significance for studying the origin and evolution of the solar system, collision warning, space resource development, etc. through the networking of micro-satellite constellation, large-scale and high-frequency observations of asteroids can be achieved. Aiming at the above requirements, through the collaborative optimization of imaging chains, this paper develops a 5kg high-performance visible camera for weak space target detection, which has the detection ability better than 13 Mv, which is equivalent to detecting a target with a diameter of 10cm at a distance of 1000km, and can be carried on a 10kg micro-satellite. Through the networking of micro-satellites, give play to the advantages of cluster detection, realize the high-sensitivity and high-frequency detection of asteroids, and provide high real-time data support for asteroid research and early warning.

Application of satellite platform angular velocity prediction based on Kalman filter in optical image stabilization system

“…Since the successful launch of the first man-made satellite in the 1950s, satellite payloads have played an irreplaceable role in the field of atmospheric and ground objects detection and recognition, and space camera technology has been rapidly developed [1] .Space-based optical camera is an important means of space target detection, and the world's major space powers are vigorously developing space-based space target detection technology to ensure space situation awareness [2] .With the development of science and technology, the development and research in the field of space science have developed rapidly, and space cameras have been more and more widely used, which has higher requirements for the detection ability and resolution of space cameras. The micro-vibration generated by the internal disturbance of the satellite platform is the main factor that affects the energy concentration of the star image point dispersion spot, so the image stabilization system is needed to compensate the change of the visual axis to obtain high quality images.To address the problem above, three methods of image stabilization have been proposed, one of which is the introduction of an image stabilization device into an optical system.Optical image stabilization works by theory of dynamic optics,which adds movable optical components to the optical system and makes the line of sight of the camera stable by compensating the motion of the optical components.Compared to other image stabilization technologies, due to the advantages of its driving mechanism's compactness, controllability and small influence by the external environment,Optical image stabilization technology has been widely applied to the field such as the civilian, military and medical.…”