spacer link to MAST page spacer logo image spacer
link to STScI page

STScI's Internet connections will be UNAVAILABLE Saturday, 28 October 2017 from 7:00 AM - 1:00 PM. STScI web servers, SSH and similar services will be unreachable from the Internet.

On-the-Fly Reprocessing (OTFR) of HST Data

Through OTFR, Hubble archive users can obtain data that are processed with the latest calibration files, software, and data parameters. The OTFR system reconstructs the data files with updated headers and calibrates data when processing a user's request for the data from the archive. WFC3, COS and ACS data can now be retrieved with OTFR system. STIS data taken prior to August 2004, NICMOS data taken prior to June 2009, and WFPC2 data are no longer provided by OTFR.

The raw data returned to users through OTFR is reconstructed from telemetry files to include updates to data parameters.

The following links provide information for users: