Continuous operating reference station (CORS) networks, underpinned by GNSS technology, support various technological services including comprehensive surveying, navigation, and remote sensing. The stability of these CORS networks is crucial for maintaining the high accuracy and reliability of data services. In this paper, we focus on analyzing the GPS deformation array of Vancouver Island, Canada, and present a thorough stability analysis scheme for CORS networks that is adaptable to other areas with frequent tectonic activity. For this study, we first conducted a data quality assessment based on three primary indices — namely, multipath effect on L1 and L2 frequency, signal-to-noise ratio in both frequency and cycle slip ratio — using the Transfer Edit Quality Check (TEQC) software. Then, we achieved high-precision data processing using the GAMIT/GLOBK software, in order to quantify the changes at each station over the specific periods. Seasonality analysis was also incorporated into the pipeline. Considering the potential variances affecting the deformation array over time, the coordinates were transformed under a unified reference frame, enabling the study of changes with station coordinates from different epochs under the same systematic conditions. Additionally, the impact of plate tectonic was examined through correlation analysis. The results showed that, while the observation data from the QUAD station in the island deformation array are of poor quality, relative stability was maintained within the deformation array. The PTRF and CLRS stations exhibited vertical instability in the fall season, while the QUAD station showed a weaker instability trend. The remaining stations maintained good stability with closer stations demonstrating stronger consistency in their displacement. In terms of plate tectonic, the deformation array stations exhibit a similar southwestward displacement trend as the North American Plate in the horizontal direction, but no significant trend in the vertical direction.

中文翻译：

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基于GAMIT/GLOBK的永久GPS变形阵列温哥华岛连续运行参考站稳定性分析


连续运行参考站（CORS）网络以 GNSS 技术为基础，支持综合测量、导航和遥感等各种技术服务。这些CORS网络的稳定性对于维持数据服务的高精度和可靠性至关重要。在本文中，我们重点分析了加拿大温哥华岛的GPS变形阵列，并提出了适用于其他构造活动频繁地区的CORS网络的彻底稳定性分析方案。在本研究中，我们首先使用传输编辑质量检查（TEQC）基于三个主要指标（即 L1 和 L2 频率的多径效应、频率信噪比和周跳率）进行数据质量评估软件。然后，我们利用GAMIT/GLOBK软件实现了高精度的数据处理，以量化每个站点在特定时期内的变化。季节性分析也被纳入管道中。考虑到形变阵列随时间变化的潜在方差，将坐标在统一参考系下进行变换，从而能够研究同一系统条件下不同历元台站坐标的变化。此外，还通过相关分析检验了板块构造的影响。结果表明，虽然岛变形台QUAD站观测数据质量较差，但变形台内部保持了相对稳定性。 PTRF和CLRS站在秋季表现出垂直不稳定，而QUAD站则表现出较弱的不稳定趋势。 其余台站保持良好的稳定性，距离较近的台站位移一致性更强。从板块构造来看，变形阵站在水平方向上表现出与北美板块类似的西南位移趋势，但在垂直方向上没有明显的趋势。