Where is Ridge A?

Geoff Sims*, Craig Kulesa, Michael C. B. Ashley, Jon S. Lawrence, Will Saunders, John W. V. Storey

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

1 Citation (Scopus)
43 Downloads (Pure)


First identified in 2009 as the site with the lowest precipitable water and best terahertz transmission on Earth, Ridge A is located approximately 150 km south of Dome A, Antarctica. To further refine this optimum location prior to deployment in 2012 of a robotic THz observatory, we have modelled the atmospheric transmission as a function of location over a 1,000,000 km square grid using three years of data from the Microwave Humidity Sounder on the NOAA-18 satellite. The modelling identifies a broad area of exceptionally low water vapour close to the 4,000 metre elevation contour, reaching below 100 microns for extended periods of time.

Original languageEnglish
Title of host publicationGround-Based and Airborne Telescopes IV
Subtitle of host publicationProceedings of SPIE 8444
EditorsLarry M. Stepp, Roberto Gilmozzi, Helen J. Hall
Place of PublicationBellingham, Washington
Number of pages9
ISBN (Print)9780819491459
Publication statusPublished - 2012
EventGround-Based and Airborne Telescopes IV - Amsterdam, Netherlands
Duration: 1 Jul 20126 Jul 2012


OtherGround-Based and Airborne Telescopes IV


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