LISA Pathfinder 中加速度噪声的虚假太阳风效应
Spurious Solar-Wind Effects on Acceleration Noise in LISA Pathfinder
AI总结：
本文通过比较 LISA Pathfinder 与 ACE 卫星 114 天太阳风数据，利用相干性分析证明太阳风对加速度噪声影响极小，可排除为噪声源。
摘要：
虚假太阳风效应是未来激光干涉仪空间天线（LISA）测量中的一个潜在噪声源。使用比较模型来预测该噪声因素可能产生的影响，并估计 LISA Pathfinder（LPF）中加速度噪声的虚假太阳风效应。来自 NASA 位于 L1 拉格朗日点的先进成分探测器（ACE）的数据作为太阳风数据的可靠来源。对 2016 年 3 月 1 日至 2016 年 6 月 23 日共 114 天期间的数据集进行了比较。为评估这些效应，对两颗卫星的数据进行了格式化、间隙填充和适配比较处理，并绘制了比较快速傅里叶变换结果的相干性图。相干性图表明太阳风对 LPF 的影响极小，而较高频率的相干性（LISA 的主要观测频段）可归因于随机巧合相关。该结果表明，在 3 个月时间尺度上由太阳风噪声引起的可测量相关性可以被排除为噪声源。这一结果令人鼓舞，尽管来自太阳的另一噪声源——太阳辐照压力——估计会产生更显著的影响，且尚未进行分析。
英文摘要：
Spurious solar-wind effects are a potential noise source in the measurements of the future Laser Interferometer Space Antenna (LISA). Comparative models are used to predict the possible impact of this noise factor and estimate spurious solar-wind effects on acceleration noise in LISA Pathfinder (LPF). Data from NASA's Advanced Composition Explorer (ACE), situated at the L1 Lagrange point, served as a reliable source of solar-wind data. The data sets were compared over the 114-day time period from March 1, 2016 to June 23, 2016. To evaluate these effects, the data from both satellites were formatted, gap-filled, and adapted for comparison, and a coherence plot comparing the results of the Fast Fourier Transformations. The coherence plot suggested that solar-wind had a minuscule effect on the LPF, and higher frequency coherence (LISA's main observing band) can be attributed to random chance correlation. This result indicates that measurable correlation due to solar-wind noise over 3-month timescales can be ruled out as a noise source. This is encouraging, although another source of noise from the sun, solar irradiance pressure, is estimated to have a more significant effect and has yet to be analyzed.
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