Once observations of interest are found,
registered and anonymous users can retrieve the data. We describe here the
various retrieval options for HST data and explain the various terms
involved, which you will encounter on the retrieval page.
Your archive username. This is the username you were given when you
registered for an archive account.
If you don't have an archive account, you can
register on-line or use the anonymous method for public data.
If you register, you should receive your archive username and password via email in a few minutes.
The data will be written to the Archive staging disk. After the data are staged,
you can download them via FTP from archive.stsci.edu/stage.
Proprietary as well as non-proprietary data may be staged.
Proprietary data, or any data you retrieve under your archive username and password,
will require you to login to the FTP server with that username and password to download your data.
Data retrieved anonymously may be downloaded either as anonymous or using your archive username and password.
If the data is non-anonymous, you may delete your data when you are done.
Anonymously retrieved data may not be deleted by users.
You may request data to be delivered on an external hard drive
if you anticipate many GB of data retrieval.
Currently the hard drive must be returned to STScI after the data are read onto your local drive.
We have a limited number of drives for use and you MUST contact the Archive Hotseat
(410-338-4547 or firstname.lastname@example.org)
to coordinate your requests and use of the hard-drive option.
Verify Your Mailing Address
If you select one of the hard media options (DVD or CD-R), we will
show you your current address and ask you to verify that it is correct.
If you need to make changes to your mailing address, simply make the
changes in the form before clicking the Send retrieval request to
ST-DADS button. Your request will not be sent until you click
on this button.
The mailing address we ask you to verify is stored in our database of
registered users. This address will be used for all of your hard-media
requests. You currently cannot have two hard-media requests in process
at the same time with two different mailing addresses. All hard-media
requests will be shipped to the address given in the registered users
The name of the directory to which the data will be written.
Please make sure that this directory exists, is writeable,
and has enough space. The retrieval will fail otherwise.
(Unfortunately, for technical reasons, we can't reliably estimate the
size of your retrieval until the files are read from the optical platters,
so we can't tell you whether there is enough space there,
but generally, retrievals are rarely more than a gigabyte in total size.)
There are five characters which, if present in a password, will cause
the retrieval to fail: (, ), *,
", and /.
All the information you enter in this form will be sent to ST ScI
through an SSL (encrypted) web connection using a
Verisign certificate. The password
remains encrypted until it is needed to transfer the data to you.
The password is not retained after the data are transferred.
If your local system disallows FTP access or sftp (OpenSSH v2), and you
are requesting only public data, you can use the STAGE
option. If you are requesting proprietary data, you may select a hard-media
option (CD, DVD).
ST ScI's On-the-fly Reprocessing (OTFR)
system for WFPC2 and STIS was opened to external users
in December of 1999. As of June 2000, ST ScI stopped
archiving calibrated data for WFPC2 and STIS.
In the first week of April 2001, we released the On The Fly Reprocessing
System for STIS and WFPC2 data. On-the-fly Reprocessing
for NICMOS data was implemented on Septmeber 26, 2001. ACS data uses the OTFR system.
Now that most WFPC2 data have been reprocessed, MAST has discontinued on-the-fly reprocessing and supplies calibrated images directly from the static archive. By default, these files are delivered in multi-extension FITS (MEF) format. If you would prefer to receive the wFITS format previously used for WFPC2 data, check the box below. For details, see the WFPC2 Reprocessing page http://www.stsci.edu/hst/wfpc2/wfpc2_reproc.html.
Files used for calibration. You may select either the files
that were used when the data was originally calibrated just
before archiving, or the calibration files that should be used
if you plan to recalibrate the data for non-OTFR instruments.
Only the best files are available for data from OTFR instruments.
Enter the specific three-letter file extension if it is not listed in the
scrolling listbox. Remember that science data is archived in FITS format
(not GEIS), so for example, the .c0h and .c0d
files will be combined into a single extension: c0f.
For common questions about retrievals see our FAQ