An image simulation for Chinese spectral radio heliograph in the decimeter wave range use CASA

The Chinese Spectral Radioheliograph (CSRH) will observe the Sun over a wide range of radio frequencies (0.4-15GHz) and make high time, space and frequency resolutions images of the Sun simultaneously, in order to address the energy release, converter and transmission processes in the solar atmosphere by mapping the solar radio emissions at dm-cm wave range. In this paper, we describe the imaging capabilities of a spiral wideband solar heliograph CSRH-I array operating at 0.4-2GHz which is capable of obtaining solar disk images at 30 ms time resolution. We use CASA (the Common Astronomy Software Applications) to map the entire sun at radio wavelengths and present simulations using models based on the Nobeyama RadioHeliograph (NORH) and the Solar Dynamics Observatory Atmospheric Imaging Assembly observations (SDO/AIA) EUV data, processing them through CSRH-I array (0.4-2GHz) and comparing with the actual images.