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{%type%} Definitions

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Short "hint"

adj. - Relating to or located at or near the point of the celestial sphere that is directly opposite the nadir and vertically above the observer

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Usage examples (5)
  • However, they addressed the worst case scenario i.e. zenithal sun, rarely found in common outdoor activities.
  • Therefore zenithal sun exposure conditions, corresponding to summer sunlight at noon and maximizing UVB proportion are rarely found.
  • However they represent extreme solar UV exposure conditions with a quasi zenithal sun irradiance i.e. a UVA to UVB irradiance ratio of less than 18, representative of a...
  • To assess more realistic solar UV exposure, a non-zenithal UV spectrum has been defined as standard daily ultraviolet radiation (DUVR) spectrum, with a UVA to UVB...
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