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.