Spectral Induced Polarization
Spectral Induced Polarization (SIP) is the name commonly used in geophysics for impedance spectroscopic measurements (special case of a geoelectric measurement). Depending on the frequency of a signal fed into the ground (applied alternating voltage or fed-in current, usually sinusoidal), the electrical resistance and the phase between electrical current and voltage are measured, alternatively real and imaginary parts . The usual frequency range extends from a few tens of kilohertz down to millihertz. Information can be obtained from the frequency-dependent phase, the phase spectrum, in addition to the amounts of resistance ( amplitude ) otherwise determined by direct current geoelectrics . Research is particularly focused on material properties, salinity and water saturation. SIP is also used on building materials, trees and in medicine.
In the working group Induced Polarization of the German Geophysical Society e. V. “Information about existing experiences, data, literature and equipment will be collected from [exchanged], standards and reference materials [worked] as well as ideas for further work and joint projects. "
Individual evidence
- ↑ AK Induced Polarization. Deutsche Geophysikalische Gesellschaft eV, accessed on January 15, 2018 (German).