all of the hiamcm data is the same as for the Vadas et al (2023b) Tonga ICON-MIGHTI paper,
Vadas, S. L., E. Becker, C.A.O.B. Figueiredo, K. Bossert, B. Harding, L.C. Gasque (2023b), “Primary and secondary gravity waves and large-scale wind changes generated by the Tonga volcanic eruption on 15 January 2022: Modeling and comparison with ICON-MIGHTI winds”, JGR Space Physics, 128, e2022JA031138. https://doi.org/10.1029/2022JA031138.

This data can be downloaded at 

https://www.cora.nwra.com/vadas/Vadas-etal-JGR-2023-TongaICON-files/