Global differential GNSS positioning and navigation

全球差分GNSS定位与导航

• 批准号: 217056-2008
• 负责人: Gao, Yang
• 金额: $ 1.94万
• 依托单位: University of Calgary
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=424770
• 关键词: Global; differential; GNSS; positioning; navigation

Due to the insatiable demand for additional user performance and applications, Global Navigation Satellite System (GNSS) is currently under rapid development. This includes the GPS modernization, the reconstitution of the GLONASS system, and the new Galileo system currently under development. A global differential GNSS (GDGNSS) positioning system has been proposed in this research which applies globally valid GNSS satellite orbit and clock corrections to conduct real-time precise position determination at centimeter to decimeter level using a single GNSS receiver. In addition to several significant advantages compared to other differential positioning techniques in terms of operational flexibility and cost-effectiveness, the proposed system can significantly improve the availability and reliability of current GPS-only global differential positioning systems. The major research tasks to be conducted include: a) investigation of the error/bias source in GPS, GLONASS and Galileo observations; b) analysis of the quality and error characteristics of precise GNSS products; c) development of global differential GNSS positioning methods and algorithms; d) investigation of fast position convergence and ambiguity resolution techniques; e) investigation of inertial aided GDGNSS positioning enhancement; and f) system implementation and performance analysis.

由于对额外的用户性能和应用的永不满足的需求，全球导航卫星系统（GNSS）目前正在迅速发展。这包括全球定位系统的现代化、全球轨道导航卫星系统的重建以及目前正在开发的新伽利略系统。本文提出了一种全球差分GNSS（GDGNSS）定位系统，该系统利用全球有效的GNSS卫星轨道和时钟改正量，利用单个GNSS接收机进行厘米到分米级的实时精确定位。除了在操作灵活性和成本效益方面与其他差分定位技术相比的几个显著优点之外，所提出的系统可以显著地提高当前仅GPS的全球差分定位系统的可用性和可靠性。将进行的主要研究任务包括：a）调查GPS、GLONASS和Galileo观测的误差/偏差来源; B）分析精确GNSS产品的质量和误差特性; c）开发全球差分GNSS定位方法和算法; d）调查快速位置收敛和模糊度解算技术; e）调查惯性辅助GDGNSS定位增强;以及f）系统实施和性能分析。