Digital Library Clause Samples

Digital Library. In addition to its dedicated telescopes, the NSO operates a Digital Library that provides synoptic data sets (daily solar images from the KPVT, FTS data, and a portion of the Sacramento Peak spectroheliograms) over the Internet to the research community. Since the inception of the Digital Library in May 1998 up until January 4, 2003, a total of 440,853 science data files have been distributed and 14,451 unique computers have accessed the system. These figures exclude any NSO or NOAO staff members. The holdings of the NSO Digital Library are currently stored on robotic CD-ROM jukeboxes and are searchable via a Web-based interface to a relational database. ▇▇▇▇▇ will soon begin to generate processed data at a maximum rate of 240 Giga Bytes per day, with requirements for rapid archiving and user access. Thus, a higher capacity storage system has been installed. This system, named solarch (for ▇▇▇▇▇ or solar archive), will also hold the Digital Library contents. The solarch system currently has 6 TB of on-line RAID5 storage, and is expected to grow to 18 Tera Bytes by the end of 2004. NSO at Sacramento Peak has accumulated a significant archive of data on photographic film. These data, which represent more than 50 years of routine observations of Hα prominences, coronal lines, Hα flare patrol etc., are indispensable in studies of long-term evolution of solar activity. However, the practical application of data is hindered by the photographic nature of the archive. NSO plans to digitize the entire archive and make it available on-line as part of the Digital Library. We estimate that the entire project can be completed in 5 years. The proposal for digitization of NSO photographic data will be submitted to NASA and NSF at the end of 2003. Tentatively, both agencies had indicated their willingness to partially fund this project.