Authors: R.T. Duffin, et al.
Affiliation: L-3 Government Services, Inc., Largo, Maryland; NASA Goddard Space
Flight Center, Laboratory for Astronomy and Solar Physics
A Joint Observing Program (JOP161) was carried out 15 April, 2003, with coordination between SOHO (CDS, SUMER, MDI & EIT) and TRACE with the goal of making detailed multiwavelength observations of coronal loop footpoints. This poster will concentrate on studying emission line intensities and velocities in the region of candidate foot-points derived from the CDS rasters, EIT and TRACE EUV data and variations. We study the line profiles from spectra of He I, He II, O III, O V, Ne VI, and Mg IX from rapid CDS rasters across the region of interest in concert with the full SUMER spectral frame around the Ne VIII line pair (765-785Å) timeseries to build up a detailed temperature profile of the loop footpoint region. We see that although line intensity information is useful to spatially isolate the loop-footpoints, the variations in the measured Doppler velocities provide the key to identification and provide the physical connectivity between the upper chromosphere, transition region and corona.