“…What really needs to be inversed is the mineralization-targeted or residual anomalies after removing the regional (background) anomalies and the neighboring interferences. There are some filtering techniques that have been applied to deal with this regional-residual separation issue, such as graphical separation (Gupta and Ramani, 1980), radial power spectrum analysis (Zahra and Nakhla, 2016;Elkhateeb and Abdellatif, 2018), match filter (Spector and Grant, 1970), preferential filtering method (Guo et al, 2013), polynomial fitting (Martínez-Moreno et al, 2015;Gabtni and Jallouli, 2017;Innocent et al, 2019), fast Fourier transform (Saada et al, 2022), and upward continuation (Eldosouky et al, 2022). However, there are no unique and absolute solutions for regional-residual anomaly separation.…”