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@MISC{Zhao:139381,
      author       = {Zhao, Yulong and Zimmermann, Egon and Huisman, Johan
                      Alexander and Treichel, Andrea and Wolters, Bernd and van
                      Waasen, Stefan and Kemna, A.},
      title        = {{N}umerical modeling of the electromagnetic coupling
                      effects for phase error correction in {EIT} borehole
                      measurement},
      reportid     = {FZJ-2013-05377},
      year         = {2013},
      abstract     = {Electrical Impedance Tomography (EIT) applications in
                      geophysics require long electrode chains (25 m) for current
                      injection and potential measurements. Undesired inductive
                      coupling between the wire loops for current injection and
                      potential measurement and capacitive coupling between the
                      cable shield and the soil strongly decrease the phase
                      accuracy of such measurements for frequencies above 100 Hz.
                      Therefore, the bandwidth of EIT field measurements is
                      typically limited to the mHz to Hz range. To overcome this
                      limitation, we derived correction procedures for inductive
                      and capacitive coupling by combining numerical modeling with
                      calibration measurements. The correction procedures were
                      verified with test measurements, where a phase accuracy
                      better than 1 mrad at 10 kHz was achieved.},
      organization  = {IEEE Sensors 2013, Baltimore (USA)},
      cin          = {ZEA-2 / IBG-3},
      cid          = {I:(DE-Juel1)ZEA-2-20090406 / I:(DE-Juel1)IBG-3-20101118},
      pnm          = {246 - Modelling and Monitoring Terrestrial Systems: Methods
                      and Technologies (POF2-246)},
      pid          = {G:(DE-HGF)POF2-246},
      typ          = {PUB:(DE-HGF)17},
      url          = {https://juser.fz-juelich.de/record/139381},
}