Magnetic raw data (SENSYS MXV3 system entire dataset) during campaign AFM-NIhK-2019-25, Ahlen-Falkenberger Moor (area 83), Germany

This is the measurement data from the geomagnetic prospection of the Ahlen-Falkenberger Moor (district of Cuxhaven, Lower Saxony, Germany) as part of the research project Preserved in the bog - relics of prehistoric settlement landscapes in the Elbe-Weser triangle funded by Niedersachsen Vorab. A total of about 800 ha were measured. The aim was to locate archaeological sites as well as landscape features. The measurements were carried out with a MXV3 system from Sensys with 11 FGM650/3 probes with a distance of 0.5m. Each probe consists of 6 sensors with 650mm basedistance and gives the gradient of the vertical component of the magnetic field (Z). The location was measured using a Stonex S10 GPS with Sapos HEPS correction data, resulting in a horizontal position accuracy of 0.01 – 0.02m and an elevation accuracy of 0.02 – 0.03m. The data were exported using DLMGPS (Sensys), whereby the coordinates of the individual probes are automatically determined from the central GPS position on the device. The data were exported without automatic track compensation. Due to the system, the position data is in UTM32/ETRS84 (EPSG 4647) and for conformity with PANGAEA also in WGS84 (EPSG 4326) (conversion is done with spTransform in R).本数据集为德国下萨克森州库克斯哈文县阿伦-法尔肯贝格沼泽（Ahlen-Falkenberger Moor）的地磁勘探测量数据，属于由下萨克森州预研项目（Niedersachsen Vorab）资助的“沼泽留存：易北-威悉三角地带史前聚落景观遗迹”研究课题的组成部分。本次勘探共完成约800公顷区域的测量工作，研究目标为定位考古遗址与地表景观特征。本次测量采用森西斯（Sensys）公司的MXV3型测量系统，搭载11台FGM650/3型探头，探头布设间距为0.5米。每台探头包含6个传感器，传感器基准间距为650毫米，可输出磁场垂直分量（Z分量）的梯度数据。定位工作采用斯通克斯（Stonex）S10型GPS接收机，结合Sapos HEPS差分修正数据，最终平面位置精度可达0.01–0.02米，高程精度为0.02–0.03米。数据通过DLMGPS（Sensys）软件完成导出，系统可基于设备搭载的中心GPS位置自动解算各探头的坐标，且本次导出未启用自动轨迹补偿功能。原始位置数据采用UTM32/ETRS84坐标系（EPSG 4647）；为适配PANGAEA数据库的格式要求，数据同时提供WGS84坐标系（EPSG 4326）版本，坐标系转换通过R语言中的spTransform工具完成。