1. the CDS studies the corona by detecting spectral emission
lines of extreme ultraviolet
wavelengths (EUV) ranging from 150-800 A
2. the camera exposure is 42-87 sec
a. we used 60 sec cadence
II. TRACE
A. the CCD (charge-couple device)
taken from Trace web site
1. the
CCD also studies the corona by observing EUV wavelengths 171, 195, 284 A
and 1200-1700 A
2. we used camera exposure
every 19 seconds