Nonlinear Magnetic Gradients and Complete Magnetic Geometry From Multispacecraft Measurements

Topological configurations of the magnetic field play key roles in dynamics space plasmas. This study presents a novel algorithm that can estimate quadratic gradient as well complete geometrical features lines, based on and current density measurements by multiple spacecraft constellation at four or more points. The explicit estimators for linear gradients, apparent velocity structure curvature torsion lines be obtained with well-predicted accuracies. feasibility accuracy method have been verified two demonstrations. has successfully applied to exhibit flux rope. wide applications studying variety