AI 中文总结
针对帕克太阳探测器观测数据中木星射电信号易被太阳风背景噪声淹没的问题，提出结合奇异值分解与双阶段滤波的处理框架，可有效分离信号并提升信噪比，还能识别长期形态趋势，证实了PSP作为木星射电观测台的可行性。
AI 中文摘要
木星十米波和百米波射电辐射为研究木星磁层动力学及其与木卫一的电动力学耦合提供了关键见解。自2018年首次观测以来，帕克太阳探测器（Parker Solar Probe，PSP）任务在21次近日点交会期间，多次在最接近太阳的位置记录了高分辨率射电与等离子体波数据，由此成为木星系统的长期远距离观测平台。然而，从连续的太阳风背景中提取这些相对微弱的行星信号是一项重大的分析难题，因为数据经常被准热等离子体噪声、航天器仪器干扰以及太阳爆发所饱和。为克服这些观测障碍，我们提出了一种通用的经验处理流程，该流程采用奇异值分解（Singular Value Decomposition）结合确定性的双阶段噪声滤波过程。通过将动态频谱转换为周期性的相位折叠参考系，该模型将结构化的木星辐射从随机的日球层背景中分离出来，经验证信噪比提升了$1.54 \boldsymbol{\times} 0.11$ dB，最高可达$3.32$ dB。此外，我们还应用了第二种“特征脸（Eigenfaces）”矩阵分解方法，用于识别长期的全局形态趋势，并作为未来木星辐射的检测方法。这种自动化的数学框架无需依赖局部空间约束即可提取瞬态行星信号，证实了PSP作为木星射电观测台的可行性。
英文摘要
Jovian decametric and hectometric radio emissions provide critical insights into Jupiter's magnetospheric dynamics and its electrodynamic coupling with Io. Across 21 perihelion encounters since its first light in 2018, the Parker Solar Probe mission has repeatedly recorded high-resolution radio and plasma wave data near closest approach, as a result serving as a long-term distant observer of the Jovian system. However, extracting these relatively faint planetary signals from the continuous solar wind background presents a significant analytical challenge, as the data is routinely saturated by quasi-thermal plasma noise, spacecraft instrumental interference, and solar bursts. To overcome these observational barriers, we present a generalized empirical pipeline that utilizes Singular Value Decomposition coupled with a deterministic, dual-stage noise filtering process. By converting dynamic spectra into a periodic, phase-folded reference frame, this model isolates structured Jovian emissions from the stochastic heliospheric background, demonstrating empirical Signal-to-Noise Ratio improvements of $1.54 \pm 0.11$ dB, reaching up to $3.32$ dB. Additionally, a secondary ``Eigenfaces'' matrix factorization is applied to identify long-term global morphological trends and serve as a detection method for future Jovian emissions. This automated mathematical framework extracts transient planetary signals without relying on localized spatial constraints, establishing the viability of PSP as a Jovian radio observatory.
Comments19 pages total, 11 figures total (7 in main body, 4 in appendix). associated zenodo databases: https://zenodo.org/records/22076017 - datasets https://zenodo.org/records/22075746 - data processing and analysis code
