Where is the best site on Earth? Dome A, B, C and F, and Ridges A and B Will Saunders, Jon S. Lawrence, John W. V. Storey, and Michael C.B. Ashley arXiv: submitted to PASP 16/05/ 6 24 ( ) M2 Abstract The Antarctic plateau contains the best sites on Earth. South Pole Dome A Dome C Dome F Ridge A Ridge B Boundary layer thickness Cloud cover Auroral emission Airglow Atmospheric thermal backgrounds Precipitable water vapor (PWV) temperature thermal backgrounds Free-atmosphere seeing to compare.. Dome A is the best site overall. Dome F is remarkably good site. OH hole exists in Spring at Dome C All Antarctic sites are compromised for optical work by airglow and aurorae. Where is the best on Antarctica? Introduction Satellite data published results atmospheric model Dome F Dome A Dome C South Pole Dome B Ridge B Ridge A This analysis combines, Boundary layer characteristics(1) Swain&Gallee(2006) Dome F has the thinnest height at 18.5m, Dome A is 21.7m, Ridge B is