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The sign accompanying the ALSEP Central Station.

It reads

ALSEP Central Station

An Apollo Lunar Surface Experiments Package (ALSEP) was deployed by all 6 Apollo missions that landed on the Moon.

While specific experiments changed with each mission, the Central Station was common to all.

It assembled data from the other ALSEP experiments, transmitted it back to Earth, and also allowed Earth-based controllers to fine-tune or activate individual experiments when desired.

The Central Station was further used to evaluate the effects of lunar dust, solar wind, and thermal changes on instrument components.

The preproduction model displayed here was used by NASA to evaluate its design.