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A novel method for dynamic measurement of deflections of the vertical (DOVs) by using the integration of inertial navigation system (INS) and global navigation satellite system (GNSS) has been proposed. Since the attitude errors of INS/GNSS integrated system are directly related to DOV, it is expected that DOV can be also estimated via the observation of INS/GNSS attitude errors. First, an attitude...
The vertical deflections (VD) error of earth gravity model, which is one of primary error sources in high-precision inertial navigation system, is usually modeled as stochastic processes. In this paper, the VD error of the Earth Gravity Model 2008 (EGM2008) are modeled as 2ed order Gauss-Markov processes. The statistical characteristics of VD error are numerically analyzed by extensive comparing with...
Though the gravity-induced velocity and position errors can be easily dumped in GPS/INS integrated navigation, the attitude estimation errors are more affected by the gravity disturbance errors. In this paper, an improved gravity disturbance compensation method is performed to reduce the gravity-induced attitude measurement error in inertial navigation system (INS) and global positioning system (GPS)...
Using the information of gravity filed for aided inertial navigation can ensure the system's passive resistance and anti-jamming, and has become the hot topic of integrated navigation field. In this paper, we establish state-space model derived from the error equation of Inertial Navigation System (INS), and set the difference between indicated gravity anomaly and measured gravity anomaly which contains...
Star sensor is beyond dispute the most accuracy absolute attitude determination sensor and it is widely used in deep space exploring and earth observing. Star image spots captured in the image sensor of the star sensor will elongate when it is under high dynamic conditions especially the rotation motion resulting in the blurred star images. The motion blurred star images with low SNR lead to the increase...
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