Site-testing Instruments

Working group of the Division IX of the International Astronomical Union (IAU)

Parameters Instruments Links Users
  • Turbulence
    • Seeing
    • Turbulence profile
    • Time constant
    • Isoplanatic angle
    • Outer scale
  • Cloud cover
  • Water vapor
  • Dust and extinction
  • Sky brightness
The mission of this Working group is:
  • to help in maintaining mutual consistency between site-testing and monitoring instruments world-wide
  • to develop standards and definitions of site parameters
  • to promote information exchange on site-testing and monitoring methods, equipment, calibration
  • to encourage international cooperation in site-testing, including developing countries

We focus on site-testing for night-time optical and IR astronomy and leave aside radio and day-time testing, at least for now. This WG covers only the instrumentation aspects of site testing and monitoring.

News and announcements

See all postings at News Archive

WWW This site

If you have any questions or suggestions regarding this site, please contact