NASA's Parker Solar Probe (PSP) mission is currently investigating the local plasma environment of the inner heliosphere (<0.25 R_⊙) using both in situ and remote sensing instrumentation. Connecting signatures of microphysical particle heating and acceleration processes to macroscale heliospheric structure requires sensitive measurements of electromagnetic fields over a large range of physical scales. The FIELDS instrument, which provides PSP with in situ measurements of electromagnetic fields of the inner heliosphere and corona, includes a set of three vector magnetometers: two fluxgate magnetometers (MAGs) and a single inductively coupled search‐coil magnetometer (SCM). Together, the three FIELDS magnetometers enable measurements of the local magnetic field with a bandwidth ranging from DC to 1 MHz. This manuscript reports on the development of a merged data set combining SCM and MAG (SCaM) measurements, enabling a high fidelity data product with an optimal signal‐to‐noise ratio. On‐ground characterization tests of complex instrumental responses and noise floors are discussed as well as application to the in‐flight calibration of FIELDS data. The algorithm used on PSP/FIELDS to merge waveform observations from multiple sensors with optimal signal‐to‐noise characteristics is presented. In‐flight analysis of calibrations and merging algorithm performance demonstrates a timing accuracy to well within the survey rate sample period of ∼340 μs.

中文翻译：

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派克太阳能探测器的合并搜索线圈和磁通门磁力计数据产品

NASA的帕克太阳探测器（PSP）的任务目前正在调查的内日光层（<0.25的局部等离子体环境ř _⊙）同时使用现场和遥感仪器。将微物理粒子加热和加速过程的特征连接到大尺度的日球结构需要对大范围的物理尺度上的电磁场进行灵敏的测量。FIELDS仪器为PSP提供了内部日球层和日冕的电磁场的现场测量，包括一组三个矢量磁强计：两个磁通门磁强计（MAG）和一个电感耦合搜索线圈磁强计（SCM）。三个FIELDS磁力计一起可以测量DC到1 MHz带宽的局部磁场。该手稿报告了结合SCM和MAG（SCaM）测量结果的合并数据集的开发情况，实现具有最佳信噪比的高保真数据产品。讨论了复杂仪器响应和本底噪声的地面特性测试，以及在FIELDS数据的空中校准中的应用。提出了在PSP / FIELDS上使用的算法，用于合并来自多个具有最佳信噪比特征的传感器的波形观测结果。对标定和合并算法性能的飞行中分析表明，计时精度可在约340μs的调查速率采样周期内很好地实现。提出了在PSP / FIELDS上使用的算法，用于合并来自多个具有最佳信噪比特征的传感器的波形观测结果。对标定和合并算法性能的飞行中分析表明，计时精度可在约340μs的调查速率采样周期内很好地实现。提出了在PSP / FIELDS上使用的算法，用于合并来自多个具有最佳信噪比特征的传感器的波形观测结果。对标定和合并算法性能的飞行中分析表明，计时精度可在约340μs的调查速率采样周期内很好地实现。