测绘通报 ›› 2017, Vol. 0 ›› Issue (10): 18-21.doi: 10.13474/j.cnki.11-2246.2017.0309

• 学术研究 • 上一篇    下一篇

有色噪声对东南极区域GPS测站三维速度估计的影响

宋爱虎1, 马超1,2, 周宁1   

  1. 1. 山东电力工程咨询院有限公司, 山东 济南 250013;
    2. 武汉大学中国南极 测绘研究中心, 湖北 武汉 430079
  • 收稿日期:2017-02-05 出版日期:2017-10-25 发布日期:2017-11-07
  • 通讯作者: 马超。E-mail:1215929130@qq.com E-mail:1215929130@qq.com
  • 作者简介:宋爱虎(1963-),男,教授级高级工程师,主要从事工程测量和GPS数据处理方面的研究。E-mail:songaihu@sdepci.com
  • 基金资助:
    国家自然科学基金重点项目(41531069)

The Effect of Colored Noise on the Three Dimensional Velocity Estimations of GPS Stations in East Antarctica Region

SONG Aihu1, MA Chao1,2, ZHOU Ning1   

  1. 1. Shandong Electric Power Engineering Consulting Co. Ltd., Jinan 250013, China;
    2. Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079, China
  • Received:2017-02-05 Online:2017-10-25 Published:2017-11-07

摘要: 近年来,有研究发现在GPS测站坐标时间序列中既存在白噪声,也存在有色噪声。为了研究有色噪声对东南极区域GPS测站三维速度估计的影响,本文使用GAMIT/GLOBK10.5软件对东南极区域6个连续GPS测站2005—2014年的实测数据进行解算和平差,并利用最大似然法(MLE)分别估计了在两种假设噪声模型条件下的测站三维运动速度及其不确定性。结果表明:在进行参数估计时,考虑两种有色噪声(闪烁噪声和随机游走噪声)对东南极区域GPS测站三维速度估计的量级影响不大,水平方向最大影响量级为0.3 mm/a,垂直方向最大影响量级为0.8 mm/a;但如果不考虑有色噪声,会严重低估参数估计的真实不确定性。

关键词: 东南极, GPS, 坐标时间序列, 有色噪声, 三维速度

Abstract: In recent years, it has been found that there were both white noise and colored noise in the coordinate time series of GPS stations. In order to study the effect of colored noise on the three dimensional velocity estimations in East Antarctica region, the measured data of 6 GPS stations from 2005 to 2014 were used for solution and adjustment by GAMIT/GLOBK10.5 software, and the maximum likelihood method (MLE) was used to estimate the three dimensional velocities and errors of the GPS stations when two noise models were assumed. The results show that when two kinds of colored noise (flicker noise and random walk noise were considered), the 3D velocity estimations of GPS stations in East Antarctica region have small changes, the maximum impact magnitude is 0.3 mm/a in horizontal and 0.8 mm/a in vertical. However if the colored noise was not considered, the parameter estimations of the true uncertainty would be seriously underestimated.

Key words: East Antarctica, GPS, coordinate time series, colored noise, three dimensional velocity

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