Smithsonian Astrophysical Observatory Telescope Data Centerivo://cfa.tdc/__system__/services/rootSmithsonian Astrophysical Observatory Telescope Data CenterSAO TDChttp://tdc-www.harvard.edu/common/headers/sao-banner1b.gif2025-12-15T19:50:17ZSAO TDC60 Garden Street, Cambridge, MA 02138, USAtdchelp@cfa.harvard.eduvirtual-observatoriesThis datacenter is meant to provide access to spectra and images collected with optical/infrared spectrographs installed on CfA's ground-based telescopeshttp://oirsa.cfa.harvard.edu:8080/__system__/services/root/info