The site's name was chosen by the late James C. Sadler, (1920–2005), an internationally noted meteorologist and professor at The University of Hawaii, formerly with the United States Air Force on assignment during the early inception of the observatory.
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The observatory lies in New Mexico at the southern end of NM Scenic Byway 6563, about 18 miles (by car) south of Cloudcroft (on NM 82), and 40 miles southeast (by car) from Alamogordo (on NM 70 and 54), in the village of Sunspot inside of the Lincoln National Forest.
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Notable existing vector magnetographs include the IVM at the Mees Observatory in Hawaii, SVM at Udaipur Solar Observatory, India, the SOLIS instrument at the National Solar Observatory (strictly speaking, SOLIS is a scanned spectropolarimeter), and the narrowband filtergraph instrument on the Hinode spacecraft.