Concept of the solar ring mission

Solar wind structures have been investigated for more than 100 years. In order to investigate the physical essence of solar wind, we develop a new method to 3-dimensionally reconstruct the solar wind structures named as CORrelation-Aided Reconstruction (CORAR), which is based on the images observed by satellites from different viewing angles. Furthermore, we use both the observational and numerical data to assess the optimal angle between the two spacecraft for the reconstruction. Base on this, we have proposed the concept of the next-generation observational project: the Solar Ring mission. The current preliminary design of the Solar Ring mission is to deploy three spacecraft, which are separated by about 120 degree and every two groups by about 120 degree. In cooperation with the satellites around the earth (e.g., Advanced Space-based Solar Observatory, ASO-S), this conguration with necessary science payloads will allow us to establish three unprecedented capabilities: (1) determine the photospheric vector magnetic eld with unambiguity, (2) provide 360-degree maps of the Sun and the inner heliosphere routinely, and (3) resolve the solar wind structures at multiple scales and multiple longitudes. With these capabilities, the Solar Ring mission aims to address the origin of solar cycle, the origin of solar eruptions, the origin of solar wind structures and the origin of severe space weather events. The successful accomplishment of the mission will advance our understanding of the star and the space environment that hold our life and enhance our capability of expanding the next new territory of human.