C. Dynamic Solar Atmosphere
• Nanoflare model (Parker 1972) developed under SR&T
• motion of magnetic footpoints
• small explosions (nanoflares) heat corona
• untestable with then-existing technology
• SR&T: High-resolution coronal imaging technology:
   Multilayer EUV optics
   è EIT & TRACE è observation of nanoflares
• SR&T: EUV spectrographs
  è SERTS rockets è CDS è observe energetics
• SR&T: High-resoluion magnetic field measurements
  è SOI/MDI è observation of footpoint motion
Corona is heated by mini-explosions