Sun Chart Sochi 2014 Rosa Khutor

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Image:Sun chart Rosa Khutor RUS February 2014.png


Image:Sun chart.php Rosa Khutor Russia February 2014.png


Sun Position

  • Calculation of the position of the sun's position in the sky at one point on the earth at a particular time of day. The calculator returns solar angle of zenith and declination angle, the time of rise set and noon.
  • Sunrise and sunset are defined as the instant when the upper limb of the Sun’s disk is just touching the horizon, this corresponds to an altitude of -0.833° degrees for the Sun.
  • Twilight is the time after sunset characterized by a diffuse light (by extension the morning twilight, use term aurora, dawn or sunrise).
  • Civil twilight lapse of time between sunset and when the sun reaches the elevation height of -6°, in the sky are visible only a few stars and planets particularly bright.
  • Nautical twilight represents the time the Sun takes a pass from -6° to -12° below the horizon, in this period are distinguished horizon line and the main stars.
  • Astronomical twilight is the time interval between sunset and when the sun reaches 18° below the horizon, the sky is dark, is possible to distinguish the stars up to the sixth magnitude.
  • Noon in solar time occurs when the sun is at its highest point in the sky for the day, and it is either due south or due north of the observer depending on the latitude.
  • Azimuth indicates an angle between a point and a reference plane. Generally is the angular distance of a point from the North.
  • The height, or Elevation , is the angular distance of the horizon a point on the celestial sphere, measured as positive if facing the Zenith, and negative if directed towards the Nadir.
  • Zenith , is the intersection perpendicular to the plane of the horizon passing through the observer with the visible celestial hemisphere and is the point above the head of the observer. The diametrically opposite point is called Nadir.
  • The knowledge of the position of the sun and the daylight hours, allow to know the energy radiated from the Sun (renewable) at the point on the Earth that we are examining.
  • Insolation is a measure of solar radiation energy received on a given surface area in a given time. The name comes from a portmanteau of the words incident solar radiation. It is commonly expressed as average irradiance in watts per square meter (W/m2) or kilowatt-hours per square meter per day (kW·h/(m2·day)) (or hours/day). In the case of photovoltaics it is commonly measured as kWh/(kWp·y) (kilowatt hours per year per kilowatt peak rating).

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