¶ Southern Great Plains (SGP)
The Southern Great Plains (SGP) site, located near the city of Billings, Oklahoma, was the first permanent ARM site established in 1992. It is the largest and most extensive climate research facility in the world. More information about the site can be found on the ARM website.
¶ SGP Extended Facilities (not found on ARM page)
¶ E9 - Ashton, OK
¶ E39 - Morrison, OK
Images below shows the general layout of E39 but also a tower in the distance that shades the radiation instruments at certain times of the year.
