https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 24.2 2026-06-24T11:05:30.557Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/instruments/fe7c93d2-1460-4292-9dda-2338c3f6120d CEILOMETERS Date=2021-08-04 User Id=sritz Entity=AltLabel Operation=INSERT System Note=insert AltLabel New Value=id: null category: primary text: CEILOMETERS language code: en Ceilometers are devices using a laser or other light source todetermine the height of a cloud base. An optical ceilometer usestriangulation to determine the height of a spot of lightprojected onto the base of the cloud; a laser ceilometerdetermines the height by measuring the time required for a pulseof light to be scattered back from the cloud base.Additional information available at'http://www.wikipedia.org/wiki/Ceilometer' 2021-08-04 17:59:16.0