NCL20: A global GNSS velocity field for estimating tectonic plate motion and testing GIA models

We created a 3D GNSS surface velocity field to estimate tectonic plate motion and test the effect of a set of 1D and 3D Glacial Isostatic Adjustment (GIA) models on tectonic plate motion estimates. The main motivation for creating a bespoke 3D velocity field is to include a larger number of GNSS sites in the GIA-affected areas of investigation, namely North America, Europe, and Antarctica. We created the GNSS surface velocity field using the daily network solutions submitted to the International GNSS Service (IGS) “repro2” data processing campaign, and other similarly processed GNSS solutions. We combined multiple epoch solutions into unique global epoch solutions of high stability. The GNSS solutions we used were processed with the latest available methods and models at the time: all the global and regional solutions adhere to IGS repro2 standards. Every network solution gives standard deviations of site position coordinates and the correlations between the network sites. […]

本团队构建了一组三维全球导航卫星系统（GNSS）地表速度场，旨在估算构造板块运动并检验一系列一维和三维冰川均衡调整（GIA）模型对构造板块运动估算的影响。构建专用三维速度场的主要动因在于纳入更多受GIA影响的调查区域（北美、欧洲和南极洲）的GNSS站点。利用每日提交至国际GNSS服务（IGS）“repro2”数据处理活动的网络解决方案，以及其他类似处理的GNSS解决方案，我们构建了GNSS地表速度场。我们将多个历元解决方案综合为独特的全球历元解决方案，以确保其稳定性。所使用的GNSS解决方案均采用当时可用的最新方法和模型进行处理：所有全球和区域解决方案均遵循IGS repro2标准。每个网络解决方案均提供了站点位置坐标的标准偏差以及网络站点之间的相关性。