The inter-satellite linkage antenna of the user satellite uses the Elevation-over-Azimuth type,and the zenith pass problem occurs during tracing TDRS. Firstly,the movement laws of the inter-satellite linkage is introd...The inter-satellite linkage antenna of the user satellite uses the Elevation-over-Azimuth type,and the zenith pass problem occurs during tracing TDRS. Firstly,the movement laws of the inter-satellite linkage is introduced for predicting the movement of the user satellite antenna. Then,the potential zenith pass moment is analyzed in detail. Some special orbits for the user satellite that can avoid the blindness zone are obtained. Finally,the zenith pass tracing strategies for the user satellite antenna based on the mechanical tilting are designed by using the trajectory preprocessor. The designs are based on the predicting results of the movement laws of the inter-satellite linkage. The strategies are proved to be reasonable and feasible for solving the zenith pass problem by simulation.展开更多
To achieve the satellite formation control and the succeed formation missions, we present a new stealthy method to determine the relative states between formation satellites. In this method, the combination of a CCD c...To achieve the satellite formation control and the succeed formation missions, we present a new stealthy method to determine the relative states between formation satellites. In this method, the combination of a CCD camera and laser radar is used as the relative measure sensors. To reduce electromagnetic radiation, the laser radar works intermittently to minimize the probability of being discovered. And an unscented Kalman filter (UKF) is applied to estimate the relative states. The observability of this method is analyzed. The validity and effectiveness of the method is demonstrated in a typical application of formation relative navigation.展开更多
文摘The inter-satellite linkage antenna of the user satellite uses the Elevation-over-Azimuth type,and the zenith pass problem occurs during tracing TDRS. Firstly,the movement laws of the inter-satellite linkage is introduced for predicting the movement of the user satellite antenna. Then,the potential zenith pass moment is analyzed in detail. Some special orbits for the user satellite that can avoid the blindness zone are obtained. Finally,the zenith pass tracing strategies for the user satellite antenna based on the mechanical tilting are designed by using the trajectory preprocessor. The designs are based on the predicting results of the movement laws of the inter-satellite linkage. The strategies are proved to be reasonable and feasible for solving the zenith pass problem by simulation.
文摘To achieve the satellite formation control and the succeed formation missions, we present a new stealthy method to determine the relative states between formation satellites. In this method, the combination of a CCD camera and laser radar is used as the relative measure sensors. To reduce electromagnetic radiation, the laser radar works intermittently to minimize the probability of being discovered. And an unscented Kalman filter (UKF) is applied to estimate the relative states. The observability of this method is analyzed. The validity and effectiveness of the method is demonstrated in a typical application of formation relative navigation.
