Why at the South Pole?


Very cold, and high altitude
Very low atmospheric moisture.
Atmos. *nearly* transparent to microwaves (At our frequencies as good as Ridge-A)
Atmosphere extremely stable (no daily sunrise/set)

No Sun for 6 months of the year:
Sun is a bright source of contamination...
Ultra clean observations in winter.

Fields remain at constant elevation angle
and superb low foreground sky available at high el!

Existing infrastructure and logistics (i.e. you guys!)