Cloudbase, lower level. Mesotech ceilometer, CBME80. This device measures cloud height using LIDAR. A pulsedlight beam is directed vertically and the return signal is detected. Depending on the nature of that return, distinct cloud layers may be detected: lower, middle and upper. If there is no distinct return (due to fog, for instance), vertical visibility is reported.
©2020 Biological and Chemical Oceanography Data Management Office.