Advanced Algorithm Development for Real-time Kinematic Precise Point Positioning

精密单点定位(PPP)在实时运动学(RTK)模式中的应用面临着几个重大挑战，为了满足应用需求并实现其巨大的商业价值，必须解决这些挑战。PPP目前需要很长的收敛时间(通常为几十分钟)，其浮点解决方案才能达到分米精度。为了使PPP能够提供厘米级的精确解决方案，还必须解决其相位测量的整周模糊度，但这目前需要非常长的初始化时间。其解决方案缺乏高水平的可靠性是其商业应用的另一个限制因素。这项拟议研究的目标是开发先进的算法来应对上述挑战。该研究项目的主要成果包括新的算法，使分米精度的PPP解决方案成为可能，而不是收敛周期，以及厘米精度的PPP解决方案，可以在几秒钟内获得，而不是目前的几十分钟。还将开发新的质量控制和可靠性保证方法，这对实时应用至关重要。这些发展将是相对于当前RTK系统的重大进步，从而对精确定位和导航行业产生重大经济影响。新的算法将把全球导航卫星系统的使用扩展到现有技术无法以成本效益或实际支持的许多新应用。

Application of precise point positioning (PPP) in real-time kinematic (RTK) mode faces several significant challenges that must be addressed in order to meet application need and to realize its great commercial value. PPP currently requires a long convergence time (typically tens of minutes) before its float solution can reach the decimeter precision. For PPP to provide cm accurate solution the integer ambiguities of its phase measurements must also be resolved but this currently requires a very long initialization time. A lack of a high level of reliability for its solution is another limiting factor for its commercial applications.The objective of this proposed research is to develop advanced algorithms to address the above challenges. The major outcomes of this research project includes new algorithms to make decimeter accurate PPP solution possible without a convergence period and cm accurate PPP solution obtainable in seconds rather than the current tens of minutes. New quality control and reliability assurance methods will also be developed which is critical for real-time applications. These developments will be significant advances over current RTK systems, resulting significant economic impacts on precise positioning and navigation industry. The new algorithms will extend the use of GNSS to many new applications that cannot be cost-effectively or practically supported by existing techniques.