JOP35 - Ground Based Instrumentation and Other Spacecraft

Yohkoh

SXT full-Sun images would be useful. Their cadence can be much faster than that of EIT so any coronal changes which may influence the study can be identified.

He 10830A

these images can be obtained from Sac Peak or elsewhere.

Other

In addition, H-alpha (Big Bear, sOON) and magnetogram (Marshall, SOON) data from ground based observatories.