The Navy Precision Optical Interferometer (NPOI) is an American astronomical interferometer, with the world's largest baselines, operated by the Naval Observatory Flagstaff Station (NOFS) in collaboration with the Naval Research Laboratory (NRL) and Lowell Observatory. The NPOI primarily produces space imagery and astrometry, the latter a major component required for the safe position and navigation of all manner of vehicles for the DoD. The facility is located at Lowell's Anderson Mesa Station on Anderson Mesa about 25 kilometers (16 mi) southeast of Flagstaff, Arizona (US). Until November 2011, the facility was known as the Navy Prototype Optical Interferometer (NPOI). Subsequently, the instrument was temporarily renamed the Navy Optical Interferometer, and now permanently, the Kenneth J. Johnston Navy Precision Optical Interferometer (NPOI) – reflecting both the operational maturity of the facility, and paying tribute to its principal driver and retired founder, Kenneth J. Johnston.[1][2]
The NPOI project was initiated by the United States Naval Observatory (USNO) in 1987.[3] Lowell joined the project the following year when the USNO decided to build the NPOI at Anderson Mesa.[4] The first phase of construction was completed in 1994, which allowed the interferometer to see its first fringes, or light combined from multiple sources, that year.[5] The Navy began regular science operations in 1997.[6] The NPOI has been continuously upgraded and expanded since then, and has been operational for a decade. The workings of NPOI as a classic interferometer, are described at Scholarpedia,[7] and at the NPOI site.[8]
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^Cite error: The named reference 1998WHIT was invoked but never defined (see the help page).
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^Cite error: The named reference 1997ARM was invoked but never defined (see the help page).
including the NavyPrecisionOpticalInterferometer, the Infrared Spatial Interferometer and the IOTA array. A number of other interferometers have made closure...
observatory, NOFS, near Flagstaff. This facility now oversees the NavyPrecisionOpticalInterferometer. By the early 1870s the USNO daily noon-time signal was...
Naval Observatory and Naval Research Laboratory in the NavyPrecisionOpticalInterferometer (NPOI) also located at that site. The Observatory also operates...
Here is a list of currently existing astronomical opticalinterferometers (i.e. operating from visible to mid-infrared wavelengths), and some parameters...
luminosity as low as 61,515±11,486 L☉. A 2018 study using the NavyPrecisionOpticalInterferometer measured the angular diameter as 2.526 mas. After correcting...
(2017-12-21). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
T. (2017). "Fundamental parameters of 87 stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 16. arXiv:1712.08109...
also very flat, it is also home to the Naval Observatory's NavyPrecisionOpticalInterferometer, or "NPOI", since 1992. It is also the inspiration for the...
T. (2017). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
et al. (2017). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
et al. (2018). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1). 30. arXiv:1712.08109...
effect, was confirmed for Altair by measurements made by the NavyPrecisionOpticalInterferometer in 2001, and analyzed by Ohishi et al. (2004) and Peterson...
detected in high spatial resolution observations using the NavyPrecisionOpticalInterferometer. The secondary star is 1.8 magnitudes (at 700 nm) fainter...
et al. (2018). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1). 30. arXiv:1712.08109...
arrays, including the Navy Prototype OpticalInterferometer and the IOTA array and soon the VLTI, CHARA array and MRO Interferometers. Projects are now beginning...
et al. (2017), "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer", The Astronomical Journal, 155 (1): 30, arXiv:1712.08109...
and Fundamental Parameters of Forty-four Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 162 (5): 198. arXiv:2211.09030...
December 2017). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
(2017-12-20). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
and Fundamental Parameters of Forty-Four Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 162 (5): 198. arXiv:2211.09030...
et al. (2018), "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer", The Astronomical Journal, 155 (1), 30, arXiv:1712.08109...
and Fundamental Parameters of Forty-four Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 162 (5): 198. arXiv:2211.09030...
et al. (2018). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1). 30. arXiv:1712.08109...
T. (2018). "Fundamental Parameters of 87 Stars from the NavyPrecisionOpticalInterferometer". The Astronomical Journal. 155 (1): 30. arXiv:1712.08109...
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