Observations of SiO J=2 1 and J=3 2 masers towards evolved stars with the TRAO 14 m telescope

We present the results of survey and time-monitoring observations of SiO J=2-1 and J=3-2 masers towards evolved stars with the 14 m radio telescope at Taeduk Radio Astronomy Observatory (TRAO) from 1995 February to 2001 February. The first detection of SiO v=3, J=2-1 maser emission toward S-type Mira variable χ Cyg is also presented.