Daocheng solar radio telescope: system and first results

Radio imaging is an important tool to monitor and diagnose solar activities. Daocheng Solar Radio Telescope (DSRT) is supported by the Chinese Meridian Space Weather Monitoring Project II. The interferometric array is composed of 313 antennas of 6 m diameter. All antennas are uniformly distributed along a circle of 1000 m diameter. A calibration antenna is place on top of a tower at the center of the circle, from where an arbitrary calibration signal is transmitted to all antennas. Combining with dedicated internal calibration and traditional astronomical calibration sources, DSRT will enable unprecedent phase similarity over the 313 elements, therefore provide highly dynamic radio images of solar bursts. The operation frequencies are from 150 MHz up to 450 MHz for tracing Coronal Massive Ejection (CME) at high atmosphere region of the Sun.The construction is started from early 2021. So far, a 16 elements small system has been finished for concept verification. Hardware will be finished by the end of 2022, and the system will be operational by June 2023. This observatory (E 100.246°, N 29.011°) locates at Sichuan province, west part of China, and is surrounded by mountains which provides excellent radio environment. This presentation will introduce the design, system and preliminary results retrieved from the 16-elements verification system, and present images of the solar activities and astronomical sources