矢量角连续性在多个光学相关性尺度上的共同地震变形的融合中
Rui Guo1, Qiming Zeng1, Shangzong Lu1
1Institute of Remote Sensing and Geographic Information System, School of Earth and Space Sciences, Peking University, Beijing 100871, China.
Sensors (Basel, Switzerland)
|August 12, 2023
概括
这项研究引入了一种新的方法,VACI-OIC,用于分析地震的地面运动. 它通过使用矢量分析和角连续性指数来改进共震变形测量,提供比传统技术更高的分辨率.
科学领域:
- 地质物理学 地质物理学
- 遥感 遥感 遥感 遥感
- 地震科学 地震科学 地震科学
背景情况:
- 光学图像对应技术测量了共震变形,克服了雷达干扰测量和像素偏移跟踪的局限性.
- 传统方法由于相关性窗口的大小而面临准确性和细节保存之间的权衡.
研究的目的:
- 开发一个后处理工作流程 (VACI-OIC),以减少转移估计对相关窗口大小的依赖.
- 提高使用光学图像相关性测量的准确性和细节.
主要方法:
- 将共震变形视为一个二维向量,同时考虑东-西和北-南方向.
- 引入一个角连续性指数,用于从不同相关窗口的融合变形场.
- 将VACI-OIC工作流应用于2021年中国马杜的地震.
主要成果:
- 在表面破裂区实现了比SAR数据更高的空间分辨率变形映射.
- 与单尺度光学相关性相比,产生了更均和更一致的变形场结果.
- 清晰地检测到地震的断裂带区.
结论:
- VACI-OIC 工作流程有效地减少了对关联窗口大小的依赖,以进行轮班估计.
- 角连续性指数为融合变形数据提供了更强大的约束.
- 这种方法在共同地震变形分析中提供了卓越的细节和统一性,特别是在高变形区域.
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