 The new global TEC map database developed by our team provides a comprehensive view of the ionosphere at all timescales, from days to years. It preserves the mesoscale structures while filling in the data gaps caused by the lack of GNSS receivers in remote areas. This makes it possible for scientists to study the dynamics of the ionosphere more accurately than ever before. This article was authored by Hu Sun, Yang Chen, Shoshou Zhu, and others.