Satellites

I. SoHO, the Solar and Heliospheric Observatory
    soho sat image
       A. international project   ESA and NASA

       B. studies the solar interior to the outer corona

       C.  CDS has good spectral coverage in EUV
 
       D.     12 instruments
               



II. TRACE , the Transition Region and Coronal Explorer
 


  trace sat image  


            A. a  NASA  small explorer mission (SMEX)

            B. studies solar corona and transition region

            C. good angular and temporal resolution

            D. one  instrument with multiple filters
                 1.  the CCD  (charge-couple device)


instruments