We invite proposals for the use of the Arecibo Observatory HF facility for the September 28, 2017 (17:00 AST, 21:00 UTC) deadline.

Important Links

Observing Proposal Submission

To begin the proposal submission process, please select cover sheet.

If you already have submitted your cover sheet and are ready to submit your proposal, please click Upload Proposal.

Please note, that for now Urgent proposals will be treated like they used to.