Overview
Time available on each of Gemini North and South is distributed according to the Observatory participants' shares. Engineering time is reserved each semester; this includes engineering time in the queue, instrument performance monitoring, engineering time to accommodate visiting instrumentation, and instrument commissioning. Any unused engineering time is returned to science. The science time includes time used for all observing modes, including standard semester programs (this call), limited-term partner (LTP) programs, Large and Long programs, Fast Turnaround programs, and Director's Discretionary time. The estimated time available for each participant and host institution is shown below. The time distribution assumes that participants involved in Large and Long Programs take their full 20%.
Gemini North 2024B
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30.5 nights (16.6%) are reserved for engineering; this includes: 12 nights of planned engineering shutdown in October, engineering time in the queue, CEM2 testing, GPOL+NIRI commissioning, EPICS7 work, GPP XT testing, instrument performance monitoring, engineering time to accommodate visiting instrumentation, and instrument maintenance tasks.
- 153.5 nights have been made available for science, which amounts to 88.2% of the total time available.
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The science time in 2024B also includes:
- 6.7 nights for DD time,
- 3.8 nights for the MAROON-X instrument team, in exchange for community use of MAROON-X.
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The Table below shows the distribution of the time available per participant.
| Participant | Estimated Science Time Available (hours) | Time Reserved for Fast Turnaround programs (hours) [A] | Time Reserved for Large and Long Programs (hours) [B] | Estimated Time Available for this Call (hours) [C] |
| US | 862.1 | 90.7 | 154.3 | 597.3* |
| Canada | 224.9 | 23.7 | 40.3 | 161.0 |
| Argentina | 25.3 | 2.1 | 0 | 23.1 |
| Brazil | 80.9 | 8.5 | 0 | 72.4 |
| Korea | 87.2 | 4.6 | 0 | 82.6 |
| Univ. of Hawaii (host) | 149.8 | 0 | 0 | 149.8 |
[A] - Up to 10% of the available time is contributed by all participants, not including the host institution (University of Hawaii), to the Fast Turnaround program.
[B] - Up to 20% of the available time is contributed by the United States, and Canada, to Large and Long Programs.
[C] - As this time also includes weather loss and time lost to faults, approximately 80% of this time is allocated to programs during the ITAC process, distributed across Bands 1, 2 and 3.
* This value is an upper limit. The listed amount of available US time does not factor in additional possible deductions arising from special programs (i.e. space mission support commitments, etc.).
Gemini South 2024B
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27.0 nights (14.7%) are reserved for engineering, this includes: engineering time in the queue, 9 nights of planned engineering shutdown in August, FLAMINGOS-2+GeMS commissioning work, GHOST HPRV commissioning work, GPP XT testing, instrument performance monitoring, engineering time to accommodate visiting instrumentation, and instrument maintenance tasks.
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157.0 nights have been made available for science, which amounts to 83.0% of the total time available.
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The science time also includes:
- 6.8 nights for DD time,
- 5.0 nights for the GHOST science team,
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The Table below shows the distribution of the time available per participant.
| Participant | Estimated Science Time Available (hours) | Time Reserved for Fast Turnaround programs (hours) [A]* | Time Reserved for Large and Long Programs (hours) [B] | Estimated Time Available for this Call (hours) [C] |
| US | 875.0 | 92.1 | 156.6 | 606.5* |
| Canada | 228.3 | 24.0 | 40.9 | 163.4 |
| Argentina | 25.7 | 2.2 | 0 | 23.5 |
| Brazil | 82.1 | 6.0 | 0 | 76.0 |
| Korea | 88.5 | 4.7 | 0 | 83.8 |
| Chile (host) | 152.0 | 0 | 0 | 152.0 |
[A] - Up to 10% of the available time is contributed by all participants, not including the host institution (Chile), to the Fast Turnaround program.
[B] - Up to 20% of the available time is contributed by the United States, and Canada, to Large and Long Programs.
[C] - As this time also includes weather loss and time lost to faults, approximately 80% of this time is allocated to programs during the ITAC process, distributed across Bands 1, 2 and 3.
* This value is an upper limit. The listed amount of available US time does not factor in additional possible deductions arising from special programs (i.e. space mission support commitments, etc.).