Abstract: Addressing the unreliability and inaccuracy of current offline fault location methods for overhead distribution networks,this study proposes an offline fault location method based on satellite timing. To locate the fault, an AC voltage signal of fixed frequency and phase is injected at the fault line’s origin after power isolation. Subsequently, the fault line is manually surveyed with a portable signal receiver. Synchronous sampling,enabled by satellite timing, allows for the determination of the zero-sequence impedance angle at each monitoring point without voltage data. The precise fault location is deduced by analyzing the variance in zero-sequence impedance angles across multiple monitoring points. Moreover, the study examines how the injected signal’s frequency, the fault point’s transient resistance,and clock synchronization discrepancies affect the accuracy of fault localization. Simulations validate the approach’s precision in identifying fault locations.