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Established in 1955 a few miles west of Flagstaff, Arizona, the Flagstaff station is the US Naval Observatory's dark-sky site for optical and near-infrared astronomy. There are presently two USNO sites in the Flagstaff area: this station (NOFS) and the Navy Precision Optical Interferometer (NPOI), located some 15 miles south of the city.

This is an official U.S. Navy web site. This system is a DoD system, subject to monitoring which is authorized in accordance with the applicable laws and regulations and conducted for purposes of systems managment and protection, protections against improper or unauthorized use of access, and verification of applicable security features or procedures. Use of this system constitutes consent to monitoring.
NOFS Webmaster Last updated: 02 April 2015