Three-Dimensional Forward Modeling for Grounded-Source Semi-Airborne Transient Electromagnetic Method With IP Effect Directly in Time Domain Based on SOE Approximation. - Shuangyan Yang; Yanfu Qi; Hui Chen; Chenchen Shu; Zetong Wang; Yuhui Zhao; Peihang Xie (IEEE Trans. Geosci. Remote. Sens., 2025)