Use of PSI for the Enhancement of Vertical Land Movement measurements in the UK

这涉及海洋2025方案工作方案1.9的具体目标㈡和《海洋法公约》优先主题领域6（干涉合成孔径雷达在陆地垂直运动中的应用）。在这个项目中，博士生将着眼于持续散射干涉测量（PSI）的应用，将潮汐测量仪的陆地运动测量与周围的区域陆地运动联系起来，以更好地估计英国海岸周围的海平面变化，这可能与气候变化有关。学生将使用PSI来产生关于10个验潮仪（配备连续GPS（CGPS）/绝对重力（AG）站）周围区域的土地水平“相对”变化的信息，目的是调查该地区土地水平变化的一致性，并通过考虑以下因素，确定CGPS和AG观测到的土地水平信号“绝对”变化的可能来源：地下地质这些目标将通过对土地水平的“相对”变化进行分析来实现，分析的基础是通过处理1997年至今所有可用的干涉合成孔径雷达数据而确定的自然发生的PS点。学生还将研究使用精确测量的人工角反射器作为校准和控制，并为PSI测量提供绝对的调整方法。学生将在设计和实现PSI演示器的IESG的专业知识的基础上，但通过自由软件STaMPS的开发。为了进行比较和校准，学生还可以使用由英国地质调查局提供的Gamma商业PSI软件。

This relates to specific objective (ii) of WP1.9 of the Oceans 2025 programme and priority topic area 6 (Application of Interferometric Synthetic Aperture Radar to vertical land movement) of SOFI. In this project, the PhD student will be looking at the application of Persistent Scatterers Interferometry (PSI) to the problem of linking measurements of land motion at tide gauges to the regional land motion surrounding it to provide a better estimate of the change in sea level around the UK coast that may be linked to climate change. The student will use PSI to produce information on the 'relative' changes in land level for an area around each of the 10 tide gauges equipped with continuous GPS(CGPS)/absolute gravity (AG) stations, with the aims of investigating the coherency of the changes in land level in that area and identifying the possible contributing sources to the 'absolute' changes in land level signal observed by CGPS and AG by considering the underlying geology. These aims will be met through the analysis of 'relative' changes in land level based on naturally occurring PS points identified through the processing of all available InSAR data for the period from 1997 to present. The student will also investigate the use of precisely surveyed artificial corner reflectors to act as calibration and control and provide an absolute method of adjustment for the PSI measurements. The student will build upon the expertise of the IESSG in the design and implementation of a PSI demonstrator, but through a development of the free software STaMPS. For comparison and calibration, the student will also have access to the commercial PSI software from Gamma, provided by the British Geological Survey.