CIIs During the May 98 CMEs

The Thermal Ion Dynamics Experiment (TIDE) instrument on the ISTP/Polar spacecraft observed intense Cusp Ion Injections (CIIs) during the May 1998 series of Coronal Mass Ejections (CMEs). The energy signatures of the CIIs can be used to determine the magnetic field topology of the geomagnetic field and the Interplanetary Magnetic Field (IMF) at the reconnection site. Particle tracing using model magnetic fields and the TIDE on observations are used to locate the point of magnetopause crossing.