Authors: Qiang Hu (UAH)

The magnetic field configurations of Interplanetary Coronal Mass Ejections (ICMEs) have long been modeled based on in-situ spacecraft measurements. We demonstrate one recently developed approach and its applications. The focus is on an optimization approach that can employ multiple in-situ spacecraft datasets across the same structure along distinct paths. A set of geometrical and physical parameters can be derived for the magnetic field structure traversed by the spacecraft. Such a configuration can be cross-checked among the multiple spacecraft datasets including the corresponding remote-sensing observations of the source region when available. This is achieved by relating certain physical properties of the ICME structure, especially those of a magnetic flux rope, modeled based on in-situ data to its formation process on the Sun. We demonstrate through a few event studies the necessity of using multiview or multi-point observations to validate ICME modeling results.