While U.S. space missions have long served their data through NASA-funded archives, ground-based archives have until recently not archived data. But that is changing.
The W.M. Keck Observatory Archive (KOA) now offers data from 900 nights of data obtained with the Near InfraRed echelle SPECtrograph (NIRSPEC). This is the second instrument whose data are archived by KOA. It opened for business in July 2006, serving raw data from the High Resolution Echelle Spectrograph (HIRES), an instrument celebrated for its role in the discovery of planets. There are now over 2,300 nights of HIRES data in KOA, In July 2008, it released browse-quality spectra extracted from the raw data. The figure below shows the growth in HIRES data volume.
The Keck Observatory Archive (KOA) is a collaboration between the NASA Exoplanet Science Institute (NExScI) and the W. M. Keck Observatory (WMKO).