The On-The-Fly Calibration (OTFC) system has now been available for retrieving STIS (and WFPC2) data from the archive since December 1999. OTFC can be accessed via Starview and with the WWW archive interface. More details are available at:

http://archive.stsci.edu/hst/otfc

The next step in full implementation of OTFC is to halt the routine archiving of calibrated data so that all retrievals of calibrated files would go through the OTFC system. This would ensure that all users would have the latest and best calibrations applied to their data. On June 19, 2000, calibrated STIS data will be available only via OTFC. The original version of the calibrated data will no longer be archived. We expect that the impact to users should be minimal and mostly beneficial, since the OTFC system provides the best possible results, using the latest software, reference files, and any necessary header keyword fixes. Any observers anticipating that they must have access after June 19 to original calibrated data products are asked to contact the help desk as soon as possible at help@stsci.edu.

Many groups within STScI participated in the OTFC project: the Archive Branch, the Archive Team, Computer and Network Services, the Data Processing Team, OPUS operations, the Software Support Group, Tools and Technology, and the STIS and WFPC2 instrument groups.