... Arecibo telescope proposal deadlines fall on the first Thursday of March and September each year. ... Proposals should be prepared under the procedures detailed in our guidelines (PDF). We invite proposals for the use of the Arecibo 305-m telescope for the Thursday, March 3, 2016 (17:00 AST, 21:00 UTC), deadline. ... This call does not include proposals for use of the HF Facility for ionospheric modification. ... Proposals must be submitted using the web-form cover sheet . ...