The new era of Seoul National University Radio Astronomy Observatory (SRAO)

Seoul National University Radio Astronomy Observatory (SRAO), a 6-meter single-dish telescope recently applied new 100GHz and 230GHz dual-band receiver. The SRAO had been inactive for several years, but resumed operation by adapting the Combined Array for Research in Millimeter-wave Astronomy (CARMA) receiver. We succeeded in the single-dish observations in 2019 March. We upgraded the SRAO to the mm-VLBI station and participated in the test observation of East Asia VLBI Network (EAVN) with several telescopes worldwide. The simultaneous single dish and VLBI observation is possible. We are going to design the new receiver and import a wideband 230GHz mixer and have a VLBI observation with Korean VLBI Network (KVN). Also, we are planning to test the phase reference technique between 100Ghz and 230GHz.