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中文摘要：
提出了利用区域内的双频观测值建立区域SEID模型,利用单频观测值反演得到双频观测值,进而组成双频无电离层组合观测值,实现了单频PPP双频解算。算例结果表明,本文提出的新方法大大缩短了定位收敛时间,显著地提高了单频PPP的定位精度。
英文摘要：
Based on the problems of long convergence time and low precision of low cost single receivers caused by the ionospheric delay errors.The author proceses first to establish a high precision Satellite-specific Epoch-differenced Ionospheric Delay model with dual frequency observation information of the area,then single frequency observations inversion to dual frequency observations and can make ionosphere free positioning solution,Finally,get dual frequency solution model of single frequency PPP.Though analyzing the numerical example with real data,the new method in this essay markedly improves the converging speed and positioning accuracy of single-PPP,and its positioning precision is approximately equal to dual frequency accuracy.
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Real-time Estimation of Satellite Clock offset Using Adaptively Robust Kalman Filter with Classified
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