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
2026A IAC internal time call
IAC-internal time for telescopes: IAC80, OGS, LCO, SARA and Open University
2026 International Time call
International Time 2026
Solar time calls
2026A Solar CAT call
Solar Time for 2026A