1. A method for determining at least one electrical property of at least one target, comprising: determining electromagnetic-field-related quantities associated with signals provided from the at least one target; providing the electromagnetic-field-related quantities to procedures to relate the electromagnetic-field-related quantities to a plurality of unknown electrical property values and residual field-related unknown values of the at least one target; and determining the at least one electrical property of the at least one target based on the determination of the procedures.