Recent Comparative Analyses of the CSSS UCSD Tomographic Solar Wind Model with in situ Spacecraft Observations

Our tomographic techniques developed over the last few years are based on kinematic models of the solar wind. This allows us to determine the large-scale three-dimensional extents of solar wind structures using interplanetary scintillation (IPS) observations and Thomson scattering brightness data in order to forecast their arrival at Earth in real time. We are specifically interested in a technique that can be combined with observations presently available from IPS velocity data and with observations which are now becoming available from the Solar Mass Ejection Imager. We use solar surface magnetogram data, and a source surface provided by the Stanford Current-Sheet Source Surface model, to provide input to the UCSD tomography program. The UCSD tomography program extrapolates the magnetic field out to and beyond Earth. The latest results are compared with in situ data.