Spectral Induced Polarization (SIP) field data sets for comparison between time and frequency domain (Martin et al. 2020)

Data and scripts for the scientific journal article: Martin, T., Günther, T., Flores Orozco, A. & Dahlin, T. (2020): Evaluation of spectral induced polarization field measurements in time and frequency domain, J. Appl. Geophys., 180, 104141, doi:10.1016/j.jappgeo.2020.104141. The paper deals with the comparison of instruments for measuring induced polarization (IP) data, both in frequency domain (FD) as well in time-domain. Four instruments have been used to measure two profiles (IP1: a=1m, IP5: a=5m) over a known blackshale near the town Schleiz in Thuringia, Germany. Preface: Our vision is not only to publish scientific results, but also openly demonstrate how the results have been produced. This includes the raw data, processed data and inversion results, but also all scripts that have been used for it in a reproducible way. The scripts use the pyBERT (Python Boundless Electrical Resistivity Tomography) based on the pyGIMLi (Python Geophysical Inversion and Modelling Library) computational framework. Here, we used the pyBERT version 2.3.1 based on pygimli 1.1.1, but it should be reachable by similar versions as well. All is based on the classes FDIPdata and TDIPdata. For installing, we refer to the webpages www.pygimli.org and gitlab.com/resistivity-net/bert Folders: figures figures used for production process, generated by the scripts in the folder scripts Python scripts for generating the pdf files IP1 data for the shallow profile using an electrode spacing of a=1m IP5 data for the deeper profile using an electrode spacing of a=5m Each of the two data folders contains data and inversion results in separated folder named according to the instrument names: * SIP256C (Radic Research) - FDIP instrument with remote units (intelligent electrodes) * DAS-1 (Multi-Phase Technology) - FDIP and TDIP instrument using multi-core cables * Terrameter LS2 (GuidelineGeo ABEM) - TDIP instrument using multi-core cables * Syscal Pro Switch72 (Iris instruments) - TDIP instrument using multi-core cables Please see readme files in the individual folders for specific information. Notice: In additon to the published results, we also added more data from the field measurements which completes our results, e.g. - TDIP data with 8s aquisition time - all four instruments for the long profile IP5 Complete full-waveform data for the Terrameter LS2 are available on request.

本数据集配套发表于以下学术期刊论文：Martin, T., Günther, T., Flores Orozco, A. & Dahlin, T. (2020): 《时域与频域谱激发极化野外测量评估》，刊载于*Journal of Applied Geophysics*，卷180，文章编号104141，DOI: 10.1016/j.jappgeo.2020.104141。
该论文聚焦于对比不同仪器的激发极化（Induced Polarization, IP）数据测量性能，涵盖频域（Frequency Domain, FD）及时域（Time Domain, TD）两种测量模式。
研究团队使用4台仪器，在德国图林根州施莱茨镇附近一处已知黑页岩区域开展野外测量，布设了两条测线（IP1：电极间距a=1m；IP5：电极间距a=5m）。
数据集说明：我们的目标不仅在于公开发表科研成果，更要完整展示成果的可复现生成流程，涵盖原始数据、处理后数据、反演结果，以及所有用于该研究的脚本代码，确保研究可被完整复现。
本研究所用脚本基于依托pyGIMLi（Python Geophysical Inversion and Modelling Library，Python地球物理反演与建模库）开发的pyBERT（Python Boundless Electrical Resistivity Tomography，Python无边界电阻率层析成像工具）。本次研究使用的pyBERT版本为2.3.1，配套pygimli版本为1.1.1，理论上兼容相近版本。所有代码均基于FDIPdata与TDIPdata类实现。相关工具的安装可参考官网www.pygimli.org及代码仓库gitlab.com/resistivity-net/bert。
本数据集的文件夹结构如下：
- `figures`：用于生成论文插图的输出文件，由`scripts`文件夹内的脚本生成
- `scripts`：用于生成PDF文档的Python脚本
- `IP1`：电极间距a=1m的浅部测线数据
- `IP5`：电极间距a=5m的深部测线数据
两个测线数据文件夹均按照仪器名称划分子文件夹，分别存放对应仪器的测量数据与反演结果：
1. SIP256C（Radic Research）：搭载远程智能电极单元的频域激发极化仪器
2. DAS-1（Multi-Phase Technology）：支持多芯电缆的频域/时域激发极化仪器
3. Terrameter LS2（GuidelineGeo ABEM）：支持多芯电缆的时域激发极化仪器
4. Syscal Pro Switch72（Iris instruments）：支持多芯电缆的时域激发极化仪器
各子文件夹内的README文件包含对应仪器的详细说明信息。
补充说明：除已发表的研究结果外，本数据集还补充了更多野外实测数据以完善研究成果，例如：
- 采集时长为8秒的时域激发极化数据
- 用于长测线IP5的全部4台仪器测量数据
Terrameter LS2的完整全波形数据可通过申请获取。