环渤海地区GPS台站时间序列分析

Time Series Analysis of GPS Station in Bohai Area

环渤海区域环境和气候复杂多变,随着地区和区域的不同,地质、地貌间的差异较大。探究该地区GPS台站时间序列的变化规律和台站的主要噪声类型、频谱规律显得尤为重要。本文基于该区域内所积累的连续数年运行的GPS测站数据,采用GAMIT/GLOBK软件进行解算和平差,获得每一个台站的坐标时间序列,并使用Lomb周期图法分析了该区域台站的频谱特性和周期特性。最后通过对频率和功率谱线性拟合分析研究了台站的噪声类型。此方法对台站时间序列去除噪声和进一步研究测站的运动规律提供了理论依据。

The regional environment and climate of Bohai Rim are complex and changeable. Geology and geomorphology vary in different areas and regions. It is particularly important to explore the change rule of GPS station time series and the main noise types and spectrum law in this region. Based on accumulated data of GPS station in last years, this paper obtains the coordinate time series for each station by calculation and adjustment with GAMIT/GLOBK software, and analyzes the spectrum characteristics and periodic features using the Lomb periodogram method. At last, it studies the noise types of the station according to the linear fitting of frequency and power spectrum analysis. This article provides the theoretical basis for station time series denoising and further studies of the motion law of observation stations.