  We analyze a series of full-Sun observations, which was performed with the
SoHO/SUMER instrument between March and October 1996. Some parameters
(radiance, shift and width) of the S VI 93.3 nm, S VI 94.4 nm, and Lyman
Epsilon line profiles were computed on board. Radiances and line-of-sight
velocities in a large central region of the Sun are studied statistically:
distributions of solar structures, field Fourier spectra and structure
functions are obtained. The structures have distributions with power-law tails,
the Fourier spectra of the radiance fields also display power laws, and the
normalized structure functions of the radiance and velocity fields increase at
small scales. These results support the idea of the existence of small scales,
created by turbulence, and of intermittency of the observed fields. These
properties may provide insight into the processes needed for heating the
transition region, or, if confirmed in the corona, the corona itself. The
difficulties encountered in this analysis, especially for the velocity data,
underline the needs for sensitive ultraviolet imaging spectrometers.
