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
The following links provide information for users: