Ceilometers

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  • Ceilometers
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  • Ceilometers are devices using a laser or other light source to determine the height of a cloud base. An optical ceilometer uses triangulation to determine the height of a spot of light projected onto the base of the cloud; a laser ceilometer determines the height by measuring the time required for a pulse of light to be scattered back from the cloud base. Additional information available at "http://www.wikipedia.org/wiki/Ceilometer"
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Abstract from DBPedia
    A ceilometer is a device that uses a laser or other light source to determine the height of a cloud ceiling or cloud base. Ceilometers can also be used to measure the aerosol concentration within the atmosphere. A ceilometer that uses laser light is a type of atmospheric lidar (light detection and ranging) instrument.

    雲高計（うんこうけい、英語: ceilometer）とは、レーザーなどの光源を使って雲底の高さを測定する装置である。雲底計（うんていけい）、雲高測定器（うんこうそくていき）、シーロメータなどとも呼ばれる。

    (Source: http://dbpedia.org/resource/Ceilometer)