GNSS整周模糊度确认理论方法研究进展

目的 从模糊度确认的理论基础出发,对目前存在的主要模糊度确认方法进行了分类,并对各方法的优缺点进行了分析,强调了各方法的理论背景与实用性情况,并展望了模糊度确认方法的研究前景。

Review of GNSS Ambiguity Validation Theory

Objective Ambiguity resolution is a core issue in high precision GNSS carrier phase positioning,inclu-ding both ambiguity estimation and ambiguity validation.Ambiguity estimation fixes the float ambigu-ity to its integer value utilizing its precision information:an integer least-squares problem.Ambiguityvalidation evaluates the estimated ambiguity and whether it can be treated as the correct:aprobabilitystatistics problem.Incorrectly validated ambiguity can lead to wrong positioning results at the decime-ter or larger bias.Therefore,ambiguity validation will have a direct impact on the reliability of ambi-guity resolution and positioning results based on the theory of ambiguity validation.We introduce sev-eral widely used ambiguity validation methodologies.The advantages and disadvantages of each meth-od are compared and analyzed,from the perspective of the background theory and practicability.Atlast,we address the outlook for future research in ambiguity validation.