有色噪聲對(duì)東南極區(qū)域GPS測(cè)站三維速度估計(jì)的影響
[Abstract]:In recent years, it has been found that there is both white noise and colored noise in the coordinate time series of GPS station. In order to study the influence of colored noise on the three-dimensional velocity estimation of GPS stations in the East Antarctic region, this paper uses GAMIT/GLOBK10.5 software to solve the peace difference of the measured data of six continuous GPS stations in the East Antarctic region in 2005 and 2014. The maximum likelihood method (MLE) is used to estimate the three-dimensional velocity and its uncertainty of the station under two hypothetical noise models. The results show that two kinds of colored noise (flicker noise and random walk noise) have little effect on the three-dimensional velocity estimation of GPS station in East Antarctic region, and the maximum influence order of horizontal direction is 0.3 mm/a,. The maximum vertical influence order is 0.8 mm/a;. However, if colored noise is not considered, the real uncertainty of parameter estimation will be seriously underestimated.
【作者單位】: 山東電力工程咨詢?cè)河邢薰?武漢大學(xué)中國(guó)南極測(cè)繪研究中心;
【基金】:國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(41531069)
【分類號(hào)】:P228.4
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