Proposals for observations with the Yebes Observatory 40-m telescope may be submitted twice per year.
The submission period starts about one month before a deadline. Submission deadlines are currently around the first weeks of December
and June each year for the 01 February - 31 July and 01 August - 31 January scheduling periods.
Exact dates and all other relevant information are given in a separate Call for proposals published on the web.
Shortly after a submission deadline the scientific secretariat sends acknowledgements of receipt to the
principal investigators of all proposals received. These receipts are sent by Email and contain the official registration number of the proposal.
Proposals are evaluated at the next meeting of the IGN Yebes program committee and recommendations are made to the Yebes Observatory
and OAN Direction. Proposals are rated A (accepted), B (backup, scheduled under certain favourable conditions), or C (rejected).
The program committee has three non-IGN members plus a OAN research member and the IGN-OAN program committee secretary.