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| 球面到达角最大后验估计的次声定位方法 |
| Infrasound localization method based on spherical angle of arrival maximum a posteriori estimation |
| 投稿时间：2025-02-26 修订日期：2025-06-09 |
| 中文摘要: |
| 对已知重点区域进行次声监测，可得到次声源所在区域的位置范围先验信息，同时地球表面的曲率对次声波远距离传播产生的影响不可忽略。因此，考虑引入先验信息后传统到达角定位问题演化为具有源位置先验信息的球面到达角定位问题。针对该问题，结合次声球面定位模型提出了一种新的球面最大后验估计算法RE-SMAPE。仿真实验表明所提算法具有鲁棒的估计性能和良好的偏差特性，避免了在传统最大似然估计算法中常见的收敛性问题，相比传统次声定位算法得到了更精确的次声源位置估计。利用汤加火山爆发数据对该定位方法进行了实验验证，取得了较好的定位结果。 |
| 英文摘要: |
| Infrasound monitoring in predefined key regions provides prior positional information about potential source locations, while the Earth's curvature exerts non-negligible effects on long-distance infrasound propagation. Consequently, the conventional angle-of-arrival (AOA) localization problem is reformulated as a spherical AOA estimation framework incorporating spatial prior constraints. To address this challenge, a recently spherical maximum a posteriori estimation (RE-SMAPE) algorithm is proposed by integrating prior geographical knowledge into the spherical infrasound propagation model. Numerical simulations demonstrate that the RE-SMAPE algorithm achieves robust estimation performance with improved bias characteristics, effectively circumventing convergence issues frequently encountered in traditional maximum likelihood estimation approaches. Comparative analyses confirm the superior localization accuracy of RE-SMAPE over classical infrasound localization methods. Experimental validation using monitoring data from the Tonga volcanic eruption further verifies the practical effectiveness of the proposed localization methodology. |
| DOI： |
| 中文关键词: 次声 球面定位 波达角度 最大后验估计 |
| 英文关键词: Infrasound Spherical localization Angle of arrival Maximum a posteriori estimation |
| 基金项目: |
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