An organization for solar astronomy, founded in 1984 and operated by the Association of Universities for Research in Astronomy. NSO conducts research at two main sites: Kitt Peak, Arizona, and Sacramento Peak Observatory, New Mexico. It also manages the Global Oscillation Network Group (GONG). The NSO instruments on Kitt Peak are the McMath–Pierce Solar Telescope; and the Synoptic Optical Long-term Investigations of the Sun (SOLIS) facility, opened in 2004. SOLIS consists of three telescopes on one mounting: a 0.5-m Vector-Spectromagnetograph (VSM) to measure magnetic field strength; a 0.14-m Full-Disk Patrol (FDP) to image the Sun in various spectral lines; and an 8-mm Integrated Sunlight Spectrometer (ISS) to record high-precision spectra in visible light. SOLIS is installed on the tower of the former Kitt Peak Vacuum Telescope (KPVT), which operated from 1973 to 2003; this is now known as the Kitt Peak SOLIS Tower (KPST).
http://www.nso.edu/ Official observatory website.
Subjects: Astronomy and Astrophysics.