GCS
GCS is a geometrical model designed by A. Thernisien to duplicate the flux rope shape of CMEs. Below is a figure of the shape of the GCS model.
eUCLID uses the GCS model for all CME measurements. This is because:
- GCS is more complex than other models (it has more parameters to fit) which means that there is more detail about the CME.
- other models (such as the ice-cream cone model or lemniscate) can be derived from the GCS model which means that modelers can take the parameters from GCS and derive lemniscate parameters.