The manner null which proofreads jiyairosukopu of the triaxial stable satellite

摘要

PURPOSE: To calibrate a gyroscope with an unknown drift by instructing two normalized postures at a continuous time interval using two-axis sensor for measuring the direction of a light emitting normalized object in a coordinate system that is fixed to a satellite. CONSTITUTION: A satellite 3 is located on a track 1 in the cruising direction marked by an arrow, a normalized object 2, for example, the sum exists at a remote location, and a two-dimensional sensor 4 that is directed in X-axis direction of the fixed coordinate system of the satellite observes the normalized object 2 at two continuous calibration intervals at a slight time interval. Then, after a first time interval, the satellite 3 is retained at a first normalized posture by a posture control system and is directed to rotate by 45 deg. in a positive rotary direction around an Z axis after the injection of the first time interval. Then, the satellite 3 occupies a second normalized posture and a direction 5 between a positive X axis and a negative Y axis is directed toward the normalized object 2, thus calculating the drift of a gyroscope from the measurement value of the sensor including the amount of fluctuation of the instructed normalized posture and the total time integration of the output signal of the gyroscope.