Array Configuration Schedule

The SMA configuration schedule is driven primarily by a few factors:

• the relative numbers of requests for different configurations in approved observing proposals, including Large Scale and Key Projects
• the right ascension distribution of approved observing targets in different configurations, including Large Scale and Key Projects
• the availability of antennas, subject to maintenace and increasingly upgrades (such as new cryo systems and site infrastructure) continuing into 2026

2025B: Compact

2026A: Compact to start

In 2026A, the SMA will be in compact (COM) configuration through September. EXT or SUB configurations will be considered for the final six weeks of the semester, depending upon proposal pressure.

Reconfiguration of the array typically requires 2 to 3 days, including antenna moves and recalibration. Schedule is subject to change.