多分析中心站坐标产品的综合方法研究

首先介绍了多分析中心产品融合处理的两种综合策略，然后基于解层面的综合策略，提出了站坐标和地球自转参数同时综合的方法。采用国际GNSS服务组织（International GNSS Service，IGS）9个分析中心1 a的数据进行试验，从站坐标、地球自转参数精度以及地心运动3个方面验证了该方法的正确性。结果表明，基于综合方法得到的综合解和IGS综合解处于同一精度水平。站坐标在平面和高程方向的一致性分别为0.5 mm和1.0 mm，极移和极移速率的一致性分别优于7.0×10-6"和40.0×10-6"/d，日长参数优于7.7×10-6 s/d。所提出的综合方法可用于全球连续监测评估系统（international GNSS monitoring and assessment system，iGMAS）的站坐标/地球自转参数产品综合。

Research on the Combination of Station Coordinate Products Derived from Multiple Analysis Centers

This paper first gives a summarization of different combination strategies, and then the combination strategy for station coordinates and earth rotation parameters (ERP) based on solution level is introduced. The one-year products from nine analysis centers of International GNSS Service (IGS) are used to validate the combination method. As far as the differences between the combined solutions and the results of IGS are concerned, the combined coordinates, ERP and geocenter motion parameters show well agreement with IGS combination. The agreement of coordinate is 0.5 mm and 1.0 mm for horizontal and vertical, respectively. While the precision of pole motion and its rate are respectively about 7.0×10-6" and 40.0×10-6"/d, and the precision of length of day (LOD) parameter is better than 7.7×10-6 s/d. The implemented program of station coordinates and ERP combination will be helpful for the international GNSS monitoring and assessment system (iGMAS) products combination.