## 留言板

 引用本文: 王文彬, 刘荣芳. 基于双频GPS观测的简化动力学最小二乘批处理精密定轨[J]. 空间科学学报, 2014, 34(4): 460-467.
WANG Wenbin, LIU Rongfang. Precise Orbit Determination Based on Reduced Dynamic Batch LSQ Estimation Method Using Dual-frequency GPS Observations[J]. Journal of Space Science, 2014, 34(4): 460-467. doi: 10.11728/cjss2014.04.460
 Citation: WANG Wenbin, LIU Rongfang. Precise Orbit Determination Based on Reduced Dynamic Batch LSQ Estimation Method Using Dual-frequency GPS Observations[J]. Journal of Space Science, 2014, 34(4): 460-467.

• 中图分类号: P3.X

## Precise Orbit Determination Based on Reduced Dynamic Batch LSQ Estimation Method Using Dual-frequency GPS Observations

• 摘要: 星载双频GPS载波相位和伪距观测量已成为低轨卫星获取精确三维位置和速度信息的主要方式. 本文以非差消电离载波相位和伪距组合作为观测量，应用简化动力学最小二乘批处理方法进行地球低轨卫星的精密定轨，并给出完整定轨流程. 采用逐段常量的经验加速度对动力学模型误差进行补偿，描述了经验加速度敏感矩阵及稀疏带状矩阵求逆的有效计算方法. 利用GRACE-A卫星GPS观测数据对定轨位置精度进行分析，结果显示，三维位置定轨精度优于5cm，经验加速度在径向、切向和法向上的补偿水平不超过40nm·s-2，大气阻力系数和辐射光压系数的估计值符合物理实际，星载接收机钟差大致呈线性并具有短周期小波动.

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##### 出版历程
• 收稿日期:  2014-01-21
• 修回日期:  2014-04-09
• 刊出日期:  2014-07-15

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