Speaker:  Yuanwei WU (PMO) 

　　Time & Place: Thursday, 9:00am, May 15, 2014, 3rd floor

　　Abstract: 

    BeSSeL and VERA are two major projects on milky way strucure with VLBI maser

    astrometry.  I will give a report on status and recent progress BeSSeL survey, including

    spiral structure kinematics of spirals, and galactic parameters.