Overview of Earth Observation Satellite Platform Microvibration Detection Methods Satellite platform microvibration is a common phenomenon in earth observation satellite orbits that directly affects the imaging quality and accuracy of surveying and mapping. With the continuous improvement in the spatial resolution, the influence of satellite platform microvibration on image geometric accuracy is becoming increasingly significant. Highprecision microvibration detection and compensation are key technologies for eliminating image distortion and location deviation caused by satellite platform microvibration. In this paper, the microvibration detection methods of different satellite platforms are summarized, and the verification and analysis are performed on the data downloaded from the Resource3 satellite (ZY3) platform, to provide technical support for subsequent refined processing of satellite attitude.

RealTime Sensor Fusion and Compensation for Widebandwidth Micro Vibration using Gyroscope and Camera An algorithm for vibration compensation in long distance laser positioning applications on a vibrating vehicle is proposed in this paper. The vibration disturbance possesses multiple significant frequency allocating in wide bandwidth with 30 xc2xb5rad amplitude. Such vibration is typical in moving platform based laser positioning and introduces significant displacement at destinations. In this paper, the low and high frequency domain vibration is sensed using the camera and gyroscope accordingly to eliminate any infrastructure requirement. A pyramid based Lucas and Kanade algorithm extracts feature displacement using the camera and a zerophase recursive least square based filter is proposed to remove drift of integrated gyroscope data. A proportional and derivative controller fuse the processed data from both sensors. The resultant data is then proceeded to a piezoelectric driven Fast Steering Mirror system for compensation. A Sliding Mode Controller with Uncertainty and Disturbance Estimator is applied for actuation control. Experiments are conducted and the result show improved accuracy comparing to existing methods.