the photographic mapping of the Moon’s surface by the Lunar Reconnaissance Orbiter(LRO)to 0.5 m resolution.
Although there is only a tiny probability that alien technology would have left traces
on the moon in the form of an artifact or surface modification of lunar features, this
location has the virtue of being close, and of preserving traces for an immense duration.
Systematic scrutiny of the LRO photographic images is being routinely conducted
anyway for planetary science purposes, and this program could readily be expanded
and outsourced at little extra cost to accommodate SETI goals, after the fashion of the
SETI@home and Galaxy Zoo projects.