RELATION BETWEEN RADIANCE DISTRIBUTIONS OF SKY ERYTHEMA ULTRAVIOLET RADIATION & SWEEP TIME

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  • 電子走査式天空紅斑紫外放射輝度分布測定装置を用いた天空走査時間に関する研究
  • デンシ ソウサシキ テンクウコウ ハン シガイ ホウシャ キド ブンプ ソクテイ ソウチ オ モチイタ テンクウ ソウサ ジカン ニ カンスル ケンキュウ
  • RELATION BETWEEN RADIANCE DISTRIBUTIONS OF SKY ERYTHEMA ULTRAVIOLET RADIATION ^|^amp; SWEEP TIME

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Abstract

Ultraviolet radiation may cause the skin damage. The shade is very effective tool preventing ultraviolet radiations. However, it is necessary to know the sky distribution of ultraviolet radiation to design the shade. In the measurement of ultraviolet radiation distribution, detector scans the all over sky. Since scanning takes long time, weather may change and we cannot measure ultraviolet radiations exactly. Authors have developed electrical sweeping equipment. It has 145 static erythema ultraviolet sensors which cover circular patches distributed all around a hemisphere surface covered with quartz. Erythema ultraviolet radiance is measured simultaneously every 3 seconds with all sensors. This study examined the influence that the scanning time gave to the ultraviolet radiations measurement. It was clarified that the relation between cloudiness and ultraviolet radiance distribution was influenced by the scanning time.

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