Study on Solar Radiation Pressure Model Considering the Yaw Attitude of the BDS

The solar radiation perturbation is an important factor affecting the accuracy of satellite orbit, it related to the satellite attitude and satellite radiation characteristics. The special constellation of Beidou navigation system lead to a difference attitude control with GPS/GLONASS, therefore, the traditional solar radiation pressure model can not meet the pressure of IGSO/MEO high precision orbit determination during the satellite attitude switching. It is necessary to establish a suitable high precision pressure model in Beidou navigation system. The thesis establish a new model which based on the BOX-WING model and also considering about radiation model parameters change during satellite attitude switch, the applicability and accuracy of the model was verified by measured data of Beidou tracking network( form MGEX). The results show that compared to the BERN model, IGSO and MEO orbit residuals improve the accuracy of 10-30% during the attitude switching period. Compared with the GBM final orbit, the residual values decreased. Meanwhile, in orbit prediction, the residual error of long arc prediction is significantly decreased.