纳入权力法模型和ERA-5数据用于InSAR热层延迟校正分析
Dongxu Huang1, Junyu Wang1,2, Menghua Li1,3,4
1Faculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Sensors (Basel, Switzerland)
|February 13, 2025
概括
本研究引入了一种新的方法,通过使用电力法模型 (PLE5) 中的ERA-5数据来改进INSAR沉降监测. 这种方法在缺乏气象气球数据的地区提高了准确性.
科学领域:
- 地质测量是指地质测量.
- 遥感 遥感 遥感 遥感
- 大气科学 大气科学
背景情况:
- 干涉测量合成孔径雷达 (InSAR) 对于监测城市沉降和基础设施稳定性至关重要.
- 大气热层延迟是影响InSAR准确性的一个主要错误来源.
- 高地盆地存在复杂的气象条件和有限的探测气球数据.
研究的目的:
- 开发和验证一种新的方法来纠正InSAR大气相位延迟,在功率法模型中使用ERA-5数据.
- 为应对InSAR大气纠正复杂地区探测气球数据不足的挑战.
主要方法:
- 建议使用ERA-5数据 (PLE5) 的权力法模型取代了传统的探测气球数据.
- ERA-5再分析数据被整合到大气延迟校正的功率规律模型中.
- 在达利,PLE5模型的性能使用Sentinel-1数据进行评估,并与GACOS,线性和直接的ERA-5校正方法进行比较.
主要成果:
- 在PLE5模型中,测试方法中的相位标准偏差最小.
- 这表明InSAR大气延迟校正精度的显著改善.
- 该研究验证了PLE5模型在现实世界的场景中的有效性.
结论:
- 该PLE5模型提供了一个可行的替代方案,用于INSAR大气校正在地区稀疏的声波气球数据.
- 这种方法提高了基于InSAR的变形测量的可靠性和准确性.
- 这些发现有助于更精确地监测城市沉降和基础设施稳定性.
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