- satellite: ~2hours after sunrise is enough

- more lines: as narrow band filters: Ca II H/K 
              for scanning: He D3, Hbeta, Hgamma,...
              CRISP + CROMIS
              own SCD prefilters ?
              
- polarimetry ?

- SATA disks instead of USB disks

- MOMFBD at penumbra -> cluster AISAS