• Coronal magnetograms: magnetograms at the base of the corona (wherever that is) • Coronal temperature maps: possible wherever the corona is optically thick, i.e., every active region (relevant for flare studies). Use maximum T at any frequency in each pixel. • Coronal magnetic shear maps: essentially difference between coronal magnetogram and potential field extrapolation of photospheric fields. Potentially valuable for flare prediction. • Emerging coronal flux: indicates regions of rapid changes of flux entering the corona •Eventually: 3D coronal magnetograms in conjunction with nonlinear force-free extrapolations of surface fields