A new composite multi-field-of-view optical sensor and its navigation method

According to the filtering method and navigation precision, the layout of multi-field-of-view of a composite optical sensor with four mirrors was presented. A kind of high-precision method of autonomous navigation based on the sensor was given. The method was to simultaneously measure the earth, navigational star and refraction star via the four mirrors of the sensor, and autonomous navigation for satellite was realized through geometrical position relation among satellite, the earth, and star direction. Also the measurement acquisitions in autonomous celestial navigation simulation were studied. Five practicable working modes of composite multi-field-of-view optical sensor are proposed. A simulation model was set up using of Kalman filtering algorithm, and the system simulation was made using simulative data at the basic of an earth-pointing satellite with a certain orbit altitude. Based on the simulation results of all five working modes, the observing mode of double directly sensing horizon combined with single stellar horizon atmospheric refraction provides the highest navigation accuracy. The position accuracy can reach order of 10 m.