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The review panels will consider Small GO (1-34 orbits), Medium GO (35-74 orbits), Calibration GO, Snapshot, Regular AR, Calibration AR and Theory Proposals. Each review panel has an allocation of a specific number of orbits, and the panel can recommend Small GO Proposals up to its orbit allocation. Medium GO Proposals will be ranked side-by-side with the Small Proposals, but the panels will not be charged for them; instead, each panel will be allocated a fixed number of medium proposals, depending on the overall medium proposal pressure within that panel. The panel recommendations generally do not require further approval of the TAC, and scientific balance will be determined within each panel rather than by the TAC.

Panelists are chosen based on their expertise in one or more of the areas under review by the panel. Each panel spans several scientific categories. For a normal cycle, we anticipate having a panel dealing with Solar System, two panels dealing with Planets (including exoplanets, planet formation, and debris disks); three panels dealing with Stars (of any temperature and evolutionary state, and including nearby star formation and Galactic ISM); two panels dealing with Stellar Populations (resolved); three panels dealing with Galaxies and the IGM (including unresolved stellar populations and ISM in external galaxies); two panels dealing with Massive Black Holes and Hosts (including AGN and Quasars); and two panels dealing with Cosmology (including large-scale structure, gravitational lensing, and galaxy groups and clusters). Within a panel, proposals are assigned to individual expert reviewers based on the keywords given in the proposal.

The Telescope Allocation Committee (TAC)

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