000824160 001__ 824160
000824160 005__ 20250129092439.0
000824160 037__ $$aFZJ-2016-06781
000824160 041__ $$aEnglish
000824160 1001_ $$0P:(DE-Juel1)133962$$aZimmermann, Egon$$b0$$eCorresponding author$$ufzj
000824160 1112_ $$a4th International Workshop on Induced Polarization$$cAarhus$$d2016-06-06 - 2016-06-08$$gIP2016/4th$$wDenmark
000824160 245__ $$aNumerical correction of phase errors due to leakage currents in wideband EIT measurements.
000824160 260__ $$c2016
000824160 3367_ $$0PUB:(DE-HGF)1$$2PUB:(DE-HGF)$$aAbstract$$babstract$$mabstract$$s1481639270_20893
000824160 3367_ $$033$$2EndNote$$aConference Paper
000824160 3367_ $$2BibTeX$$aINPROCEEDINGS
000824160 3367_ $$2DRIVER$$aconferenceObject
000824160 3367_ $$2DataCite$$aOutput Types/Conference Abstract
000824160 3367_ $$2ORCID$$aOTHER
000824160 520__ $$aAdvanced model-based data correction methods are needed in order to determine the small phase response of low-polarizable soils and rocks in the higher frequency range up to 10 kHz. Methods have been developed to correct several system-dependent errors, such as amplification errors, signal drift, current measurement errors, potential measurement errors due to high electrode impedances, propagation delay of the signal due to the long cables, and phase errors introduced by inductive coupling between the electrode cables. However, measurements at test sites with high resistivity have shown a new dominating phase error, which was found to be related to capacitive leakage currents between system ground and the soil. In order to correct this error, we enhanced the FEM modelling used for the reconstruction of the electrical conductivity distribution. Using this new formulation of the FEM forward model, this source of error was reduced by a factor of five or more. This enables an electrical conductivity reconstruction for frequencies up to 10 kHz. In future work, it will be investigated whether the capacitive leakage currents can be reduced by optimization of the cable layout. In any case, it is helpful to use the leakage current as a proxy for data error during data filtering, and it can also be used to decide if the enhanced FEM model presented here should be used.
000824160 536__ $$0G:(DE-HGF)POF3-255$$a255 - Terrestrial Systems: From Observation to Prediction (POF3-255)$$cPOF3-255$$fPOF III$$x0
000824160 7001_ $$0P:(DE-Juel1)129472$$aHuisman, Johan Alexander$$b1$$ufzj
000824160 7001_ $$0P:(DE-Juel1)140421$$aMester, Achim$$b2$$ufzj
000824160 7001_ $$0P:(DE-Juel1)142562$$avan Waasen, Stefan$$b3$$ufzj
000824160 8564_ $$uhttp://hgg.au.dk/fileadmin/www.gfs.au.dk/DIV/Abstracts_from_Session_B.pdf
000824160 909CO $$ooai:juser.fz-juelich.de:824160$$pVDB
000824160 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)133962$$aForschungszentrum Jülich$$b0$$kFZJ
000824160 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)129472$$aForschungszentrum Jülich$$b1$$kFZJ
000824160 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)140421$$aForschungszentrum Jülich$$b2$$kFZJ
000824160 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)142562$$aForschungszentrum Jülich$$b3$$kFZJ
000824160 9131_ $$0G:(DE-HGF)POF3-255$$1G:(DE-HGF)POF3-250$$2G:(DE-HGF)POF3-200$$3G:(DE-HGF)POF3$$4G:(DE-HGF)POF$$aDE-HGF$$bErde und Umwelt$$lTerrestrische Umwelt$$vTerrestrial Systems: From Observation to Prediction$$x0
000824160 9141_ $$y2016
000824160 9201_ $$0I:(DE-Juel1)ZEA-2-20090406$$kZEA-2$$lZentralinstitut für Elektronik$$x0
000824160 9201_ $$0I:(DE-Juel1)IBG-3-20101118$$kIBG-3$$lAgrosphäre$$x1
000824160 980__ $$aabstract
000824160 980__ $$aVDB
000824160 980__ $$aI:(DE-Juel1)ZEA-2-20090406
000824160 980__ $$aI:(DE-Juel1)IBG-3-20101118
000824160 980__ $$aUNRESTRICTED
000824160 981__ $$aI:(DE-Juel1)PGI-4-20110106
000824160 981__ $$aI:(DE-Juel1)IBG-3-20101118