应用Kalman滤波实时求解硬件延迟

¹武汉大学卫星导航定位技术研究中心,武汉市珞喻路129号,430079;²武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430079;³上海伽利略导航有限公司,上海市桂平路680号,200233;⁴上海交通大学航空航天学院,上海市东川路800号,200240

基金项目: 国家973计划资助项目(2009CB724002)；国家自然科学基金资助项目(40804005)；国家863计划资助项目(2007AA12Z321,2006AA12A109)；上海市科委重点资助项目(075115013)；上海市科委重大资助项目(08dz1500300)

详细信息

Real Time Estimation of DCB Using Kalman Filters

¹Research Center of GNSS,Wuhan University,129 Luoyu Road,Wuhan 430079,China;²State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,129 Luoyu Road,Wuhan 430079,China;³Shanghai Galileo Industries Ltd,680 Guiping Road,Shanghai 200233,China;⁴School of Aeronautics and Astronautics,Shanghai Jiaotong University,800 Dongchuan Road,Shanghai 200240,China

Funds: 国家973计划资助项目(2009CB724002)；国家自然科学基金资助项目(40804005)；国家863计划资助项目(2007AA12Z321,2006AA12A109)；上海市科委重点资助项目(075115013)；上海市科委重大资助项目(08dz1500300)

摘要: 采用均方根信息滤波(SRIF)方法,对IGS站实时观测数据进行了单历元解算,以便将卫星钟差等相关信息及时播发给用户,以进行实时精密定位。试验结果表明,GPS实时单历元解算的精密卫星钟差与IGS事后精密钟差相比,互差优于0.2ns,其精度与国际IGS各分析中心估计的卫星钟差精度相当。
- 精密卫星钟差 /
- 均方根信息滤波(SRIF) /
- 精度分析 /
- PANDA
Abstract: Combined with VTEC Spherical Harmonic Function Model,the Kalman Filter with external constraint condition between some parameters solved is used for real time estimation of GPS satellite and receiver's Differential Code Bias (DCB). This can be used to provide DCBs for Wide Area Augmentation System's real time ionosphere delay modeling. The results show that the DCB can converge in short time in this solution. The final value of those DCBs is in little bias comparing with the results of IGS.
- constrained /
- Kalman filter /
- differential code bias /
- VTEC