Downtime

STScI will be performing network upgrades on the following dates:

Sat 17 Apr 2021, 7:00 AM - 2:00 PM EDT (11:00 - 18:00 UTC)
Sat 24 Apr 2021, 7:00 AM - 4:00 PM EDT (11:00 - 20:00 UTC)
Sat 1 May 2021, 7:00 AM - 4:00 PM EDT (11:00 - 20:00 UTC)
Sun 2 May 2021, 7:00 AM - 4:00 PM EDT (11:00 - 20:00 UTC)
Sat 8 May 2021, TBD
Sun 9 May 2021, TBD

Services may be unavailable or interrupted during these times.

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: