Smithsonian Astrophysical Observatory High Altitude Observatory

The ultraviolet coronal spectrometer (UVCS) from the Smithsonian
Astrophysical Observatory at Harvard will measure the velocities,
temperatures, and densities of the coronal plasmas.

The ultraviolet instrument and the WLC are housed in an evacuated
cylinder with an aperture door that is opened after SPARTAN is released
from the shuttle.