Decommissioning the Caltech Submillimeter Observatory (CSO) on Maunakea Adriaanse, D., Chun, G., Golwala, D., Grigel, E., Hayes, J., Johnson, B., Radford, S., Simmons, C., Steen, J., Valenzuela, N., Young, P. 2026 Proc. SPIE 14147-02 doi