Welcome to the IAC Time Allocation Commission proposal submission service. Please visit CAT for additional information and news about the proposal submission process and the time allocation of the Commission. Registration is required for proposal submission. Already have an account? Please log in to view and submit proposals. This is a demo environment, only for testing.
Night time calls
2026 International Time call
International Time 2026
2026A IAC internal time call
IAC-only time for telescopes : IAC80, OGS LCO, SARA and Open University
Spanish Service Time
Spanish Service time for TNG, NOT, TCS and IAC80 only. The PI of the IAC80 proposals must affiliated to the IAC.
Solar time calls
2026A Solar CAT call
Spanish solar time for the 2026 campaign (SST and THEMIS) and 2026 first semester (GREGOR)