Access Policy


All projects/proposals observed at Arecibo have a 18 months embargo period. On certain cases, a project may have a different embargo period and/or other special criteria that restricts the access to the project's data.

Our Data Catalog search engine provides information on each project's clearance status. Possible classifications are:

  1. Open: the project's data is available for download.
  2. Embargoed: the project's data is still under embargo period.
  3. Special Criteria: the project falls under a special criteria that restricts the access to the data.

AO data files (both raw data and science data products) may be distributed by third parties, and disseminated via other services, according to the terms of the Creative Commons Attribution 4.0 International license. Credit to the AO provenance of the data must be acknowledged, and the file headers preserved.

In case of scientific use of the AO data by users that access AO data via third party archival services, the users should follow the same acknowledgement policies as for the AO Data Archives, as described below.

If the access to the AO Data Archive services was helpful for the users’ science work, the following acknowledgement is recommended: This research has made use of the services of the ESO Science Archive Facility.

All users of the AO Data Archive are required to acknowledge the source of the data with an appropriate citation in their publications. Publications making use of AO observational data must include the following statement in a footnote or in the acknowledgement:

Based on observations collected at the Arecibo Observatory under AO project(s) {A,P,S,T}-NNNN1

Publications making use of the AO Data Archive, for raw data or science data products, must include the following statement in a footnote or in the acknowledgement:

Based on data obtained from the Arecibo Data Archive under request number <request_number>.

Publications making use of Arecibo observational data must include the following statement in a footnote or in the acknowledgement:

This work is based on observations done with the XXXX based at the Arecibo Observatory. The Arecibo Observatory is an NSF facility managed by the university of Central Florida under cooperative agreement.

For scientific institutions distributing further ESO raw and/or data products:

Based on observations collected at the Arecibo Observatory under project id {A,P,S,T}-NNNN1, and/or data products created thereof.

You will find the Arecibo Project ID in the FITS file header of the observations under the keyword PROJID.

If you are interested in downloading RAW data from a proposal/project, you need to follow the steps below:

  1. Browse the desired project and validate that it shows Data Files available.
  2. Click on the Request Data function for the desired project.
  3. The system will generate a Workflow, you will receive an email confirming the action.
  4. Arecibo staff will review your request to make sure data is available and ready to be served.
  5. Once approved and reviewed, you will receive an email with followup actions.

Please note: that in order to download the data, your system/terminal needs to comply with the following requirements:

Please note: that in order to download the data, your staff and system/terminal needs to comply with the following requirements:

  1. UNIX commands understanding.
  2. FTP proficiency (via terminal or GUI).
  3. Unblocked access through Ports 80, 443 and 22 (HTTPS/SSH/FTP).