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地震 ›› 2014, Vol. 34 ›› Issue (4): 61-69.

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GPS数据解算过程中相关问题研究

朱爽, 杨囯华, 占伟   

  1. 中国地震局第一监测中心,天津300180
  • 收稿日期:2014-03-11 修回日期:2014-05-09 出版日期:2014-10-31 发布日期:2020-09-11
  • 作者简介:朱爽(1987-),女,河南新乡人,助理工程师,现从事GNSS高精度解算与分析。
  • 基金资助:
    公益性地震行业科研专项(201308009)$震情跟踪青年课题(2013020208)

Study of Some Problems in GPS Data Processing

ZHU Shuang, YANG Guo-hua, ZHAN Wei   

  1. First Crust Monitoring and Application. Center,CEA,Tainjin 300180,China
  • Received:2014-03-11 Revised:2014-05-09 Online:2014-10-31 Published:2020-09-11

摘要: 基于2011和2012年陆态网GPS连续观测数据,分析了GPS水平速度场数据解算过程中,不同对流层延迟参数个数与初始坐标偏差对解算精度的影响;利用重采样方法模拟生成多 组不同时间间隔的流动数据,分析了不同时间间隔的流动观测模式下的解算精度。通过实验证实,为了得到高精度的GPS单日松弛解,必须进行对流层延迟估计,对流层参数个数设置为 2, 7, 13时解算精度存在少量差别,表现为随着参数增多解算精度有所提高;初始坐标误差在 10;时可以得到精度较高的时间序列结果,误差在30m及50 m时不能得到可用的时间序列;当流动观测时间间隔大于1年时,可以获得较为可靠的水平速度场结果$时间间隔短于1年 时,水平速度场解算精度较低。

关键词: GPS, 水平速度场, 对流层延迟, 初始坐标误差

Abstract: Based on the GNSS continuous observation data of CMONOC in 2011 and 2012, troposphere delay error and initial coordinate error in the GPS high precision processing are analyzed. Campaign observations with different time intervals were simulated by resampling to test the precision. The results indicate thatin order to get high precision time series ,troposphere delay must be calculated. The precisions of results with different troposphere parameters are equal,such as 2,7,13,the right number should be picked according to the calculation needs. Time series with high precision could be obtained when the initial coordinate error is within 10m, however,when the initial coordinate error is 30 m or 50 m,we can not obtain the available time series. When the time interval of campaign observation is larger than 1 year,velocity field with reliable precision can be obtained,while the time interval shorter than 1 year, the precision of the result is lower.

Key words: GPS data processing, Horizontal velocity field, Troposphere error

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