【摘要】 利用全球120个跟踪站2019年doy110～139观测数据进行GPS精密定轨；然后采用ECOM1、ECOM1+BW、ECOM1+ABW等3种光压模型，使用7个未参与定轨的测站进行PPP实验。结果表明，ECOM1+ABW组合模型轨道精度最高，非地影期三维轨道精度优于4 cm;对于静态PPP,收敛后水平方向精度优于0.8 cm,垂直方向精度优于1.2 cm;对于动态PPP,收敛时间在30 min左右，收敛后水平方向精度优于1.4 cm,垂直方向精度优于2.0 cm。更多还原

【Abstract】 Using the 2019 doy110-139 observation data from 120 tracking stations around the world, we carry out precise GPS orbit determination. Then, we carry out PPP experiments using 7 stations not involved in orbit determination with three solar radiation pressure models: ECOM1, ECOM1+BW, ECOM1+ABW. The results show that the orbit accuracy obtained by the ECOM1+ABW combination model is highest, with three-dimensional orbit accuracy in no-earth eclipse seasons better than 4 cm. For static PPP, the accuracy of horizontal direction is better than 0.8 cm and the accuracy of vertical direction is better than 1.2 cm after convergence. For kinematic PPP, the convergence time is about 30 min. After convergence, the accuracy of horizontal direction is better than 1.4 cm and the accuracy of vertical direction is better than 2.0 cm.更多还原