Constraints on coronal outflow velocities derived from UVCS Doppler dimming measurements and in-situ charge state data

We constrain coronal outflow velocity solutions, resolved along the line-of -sight, by using Doppler dimming models of H I Lyman alpha and O VI 1032/10 37 Angstrom emissivities obtained with data from the Ultraviolet Coronagrap h Spectrometer (UVCS) on SOHO. The local emissivities, from heliocentric he ights of 1.5 to 3.0 solar radii, were determined from 3-D reconstructions o f line-of-sight intensities obtained during the first Whole Sun Month Campa ign (10 August to 8 September 1996). The models use electron densities deri ved from polarized brightness measurements made with the visible light coro nagraphs on UVCS and LASCO, supplemented with data from Mark III at NCAR/ML SO. Electron temperature profiles are derived from 'freezing-in' temperatur es obtained from an analysis of charge state data from SWICS/Ulysses. The w ork concentrates on neutral hydrogen outflow velocities which depend on mod eling the absolute coronal H I Ly alpha emissivities. We use an iterative m ethod to determine the neutral hydrogen outflow velocity with consistent va lues for the electron temperatures derived from a freezing-in model.