Photon/Optical Detectors
2021-08-04 17:59:16.0 [sritz] insert AltLabel (id: null category: primary text: CEILOMETERS language code: en);
CEILOMETERS
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"