Calidad del cielo

Parámetros de calidad de cielo

  • Artist impression of an adaptive optics system using a natural guide star separated an angular distance ~θ0 (credit: Gabriel Pérez -Servcio Multimedia, IAC-)
    Ángulo Isoplanático
    The isoplanatic angle (θ 0) is the angle for which the variance of the differences of the phase aberrations suffered by two rays of light passing closely through the atmosphere from different points
  • Night Sky Background
    Brillo de cielo nocturno
    El brillo de cielo es la medida habitual de cuánto brilla el cielo nocturno en una noche clara sin luna. Es una medida de la calidad del cielo.
  • Sky extinction effect close to the horizon with TNG and GTC telescopes at the forefront.
    Extinción Atmosférica y Espesor Óptico de Aerosoles
    Atmospheric extinction evaluates the transparency of the sky. It can be defined as the amount of light from an astronomical object that is scattered or absorbed by the Earth's atmosphere and not
  • Meteorology and climate
    Meteorología y clima
    Condiciones meteorlógicas en los Observatorios de Canarias.
  • Seeing and coherence time
    Seeing
    Astronomical seeing (units arcesec) refers to the blurring or instantaneous image broadening of astronomical objects caused by turbulent mixing in the Earth's atmosphere due to the variations of the
  • SCIDAR scintillation patterns showing turbulence layers moved by the wind across the telescope pupil (credit: IAC).
    Tiempo de coherencia
    The coherence time (τ 0) is the time lapse that the light crossing the Earth atmosphere maintains a near-constant phase relationship, both temporally and spatially.