Outdoor Magnetic Field Spatial Characterization Dataset Using a Quantum Magnetometer, Toronto (2025)

This dataset contains preprocessed outdoor magnetic field measurements collected using an SBQuantum SBQDM quantum magnetometer (optically pumped atomic magnetometer) at three outdoor locations in Toronto, Canada, during August–September 2025. Measurement Sites and Grid Configuration Measurements were conducted at Smythe Park (primary site), Scotiabank Road, and Toronto City Hall. At Smythe Park, data were collected across a 5×5 grid (1 m spacing, 25 points) over 10 repeated sessions under varying temporal and environmental conditions. At the two urban sites, a 2×3 grid (1 m spacing, 6 points) was used for a single session each. Data Format Each CSV file corresponds to one grid location and contains a continuous time-series recording of approximately 38 seconds. Each file includes three-axis magnetic field components (Bx, By, Bz) and the Euclidean magnitude (B_norm) as output by the vendor acquisition software. A total of 262 CSV files are included across 12 sessions. Preprocessing Thirteen anomalous samples with |B_norm| > 2×10⁶ nT were excluded prior to analysis. These samples correspond to sensor temperature-compensation transients and do not represent ambient field conditions. No other filtering or smoothing was applied. The manufacturer-provided static offset values (Ox, Oy, Oz) were subtracted from each axis component to compute the corrected magnetic flux density magnitude used in the associated study. Intended Use This dataset supports reproducibility of the analyses reported in the associated manuscript: Oh, C.-G. & Sultana, A., "Outdoor Magnetic Field Spatial Characterization Using a Quantum Magnetometer for GNSS-Complementary Positioning," IEEE Sensors Journal (under review), 2026. Analysis scripts are provided in the companion repository. Keywords quantum magnetometer, magnetic fingerprinting, outdoor magnetic field, spatial characterization, GNSS-complementary positioning, temporal stability, Toronto本数据集包含经预处理的室外磁场测量数据，采集设备为SBQuantum公司生产的SBQDM量子磁力计（quantum magnetometer，光泵原子磁力计(optically pumped atomic magnetometer)），采集时间为2025年8月至9月，采集地点位于加拿大多伦多的三处室外场地。 测量场地与网格布局 测量工作分别在斯迈思公园（Smythe Park，主测量场地）、丰业银行路（Scotiabank Road）以及多伦多市政厅（Toronto City Hall）开展。在斯迈思公园，研究人员于不同时间与环境条件下开展了10次重复测量会话，采集范围为5×5网格（测点间距1米，共25个测点）。在两处城市场地，各开展1次单次测量会话，采用2×3网格布局（测点间距1米，共6个测点）。 数据格式 每个CSV文件对应一个网格测点，包含约38秒的连续时间序列记录。文件中包含厂商采集软件输出的三轴磁场分量（Bx、By、Bz）以及欧几里得模长（Euclidean magnitude，B_norm）。本次数据集共涵盖12次测量会话，总计包含262个CSV文件。 预处理流程 分析前已剔除13个异常样本，这些样本的|B_norm| > 2×10⁶纳特斯拉（nT），对应传感器温度补偿瞬态过程，并非真实的环境背景磁场。本次预处理未进行其他滤波或平滑操作。研究人员已将厂商提供的静态偏移量（Ox、Oy、Oz）从各轴分量中扣除，以计算本数据集配套研究中使用的校正后磁通密度模长。 数据集用途 本数据集可复现配套论文中的分析结果：作者为Oh, C.-G. 与 Sultana, A.，论文标题为《基于量子磁力计的室外磁场空间特征表征用于全球导航卫星系统（Global Navigation Satellite System，GNSS）互补定位》，发表于《IEEE传感器学报》（IEEE Sensors Journal，2026年，处于审稿待录用状态）。配套代码仓库已提供完整分析脚本。 关键词 量子磁力计（quantum magnetometer）、磁场指纹识别（magnetic fingerprinting）、室外磁场、空间特征表征（spatial characterization）、GNSS互补定位、时间稳定性（temporal stability）、多伦多