提高增强系统电离层延迟改正数估计的方法研究

Research on Enhancing Ionosphere Delay Estimate of Augment System

在对中国建立的GPS广域增强系统相关理论进行分析和研究的基础上，对广域增强系统的组成和基本原理进行了分析和研究，探讨了传统差分增强系统存在的缺点，在汲取已有研究成果和相关理论的基础上，研究了与电离层延迟改正数相关的理论和计算模型，研究了在单参考站情况下提高和改善电离层延迟估计的模型和理论方法，设计的算法模型成功实现了电离层延迟和频率间偏差的分离和估计，最后通过对观测数据的分析和仿真处理，验证了设计模型的合理性，取得了预期效果。

Based on the theory and research on a GPS Wide-Area Augment System （WAAS） built in China. The composition and the basic theory of WAAS are analyzed. The shortcomings in traditional differential augment system are researched. According to the experience drawn from the past researches and theories, the theory and the arithmetic model related to ionosphere delay are provided, including a way of improving the precision of ionosphere delay in one-reference station. As a result, the arithmetic model is used to fully separate and estimate the ionosphere delay and frequency offset. In the end, the analysis, simulation and processing of the real data have proved that the model is reasonable, with having achieved the expected result.