Improvement to the global distribution of coronal plasma and magnetic field on the source surface using expansion factor fs and angular distance θb

► We develop an improved model to build a self-consistent global structure at 2.5 Rs. ► Magnetic field expansion factor fs and angular distance θb are involved. ► Observation data of photospheric field and K coronal polarized brightness are used. ► Coronal mass outputs are analyzed at different phases of solar activity. ► Solar wind speed at 1 AU is estimated, which can be compared with observation data.