报告人：Feng Yanming（澳大利亚昆士兰科技大学 教授）

时间：2025年12月12日（周五） 14:00-15:30

地点：测绘馆206报告厅

报告简介：

Nonlinear motions in GNSS coordinate time series complicate millimetre-level geodesy. Beyond surface mass loading, thermoelastic effects significantly contribute to this nonlinear signal. We introduce a Full-Spectrum Layered finite element model (FEMFL) to compute thermoelastic displacements, incorporating soil stratification and diurnal ERA5 soil temperatures, with a linear model for above-ground monuments. Analysis of 20,000 GNSS stations reveals seasonal and non-seasonal below-ground thermoelastic displacements up to ~5 mm and monument motions up to 3 mm. Applying thermoelastic corrections to GNSS time series reduces vertical scatter by 9%, demonstrating the importance for refining GNSS reference frames and deformation monitoring.

报告人简介：

Feng Yanming is a Professor of Network Engineering and Data Science at the Queensland University of Technology in Australia. His research expertise spans several interconnected fields, including: Satellite orbit determination and GNSS data processing for precise positioning; Vehicular network communication and intelligent transportation systems; and Integration of the Internet of Things (IoT) with GNSS for deformation monitoring and positioning applications. Over the past two decades, he has led and contributed to more than 20 major research and industry projects funded by the Australian Research Council (ARC) and other national institutions. He has also served as a project leader or principal investigator across five Australian Cooperative Research Centres (CRCs).