ceilometer


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ceilometer

(sēlŏm`ĭtər), in aviation and meteorology, automatic instrument used to record ceiling, i.e., the altitude of the lowest cloud layer covering more than half of the sky. The ceilometer consists essentially of a projector, a detector, and a recorder. The projector emits an intense beam of light into the sky. The detector, located at a fixed distance from the projector, uses a photoelectric cell to detect the projected light when it is reflected from clouds. In the fixed-beam ceilometer, the light is beamed vertically into the sky by the projector and the detector is aligned at various angles to intercept the reflected light; in the rotating-beam ceilometer, the detector is positioned vertically and the light projected at various angles. In either case, trigonometry is used to determine the altitude of the clouds reflecting the light from a knowledge of the angle at which the light is detected and the distance between the projector and detector. The recorder is calibrated to indicate cloud height directly. False readings from extraneous light sources are reduced by modulating the projected light beam so that it can be recognized when it is reflected.

ceilometer

[sē′läm·əd·ər]
(engineering)
An automatic-recording cloud-height indicator.

ceilometer

ceilometer
Cloud ceilometer.
An instrument to measure the heights of clouds during the day. The ceilometer beams a light at the cloud base, which it detects by a photoelectric cell. A process of triangulation then determines the height of the cloud.
References in periodicals archive ?
One of the many requirements was that the Ceilometers must be able to measure in a range of 7.
Cloud Metrics Aggregation for Better Decision-Making: OpenStack Ceilometer collects a wide array of metering data across OpenStack managed resources.
In the category "optical sensors," Lufft provides the snow altimeter SHM 30 and the ceilometer CHM 15k and special designed software CHM Viewer.
ManageIQ can provide the additional management capabilities developers need, integrating with a number of OpenStack technologies and projects, including Nova, Glance, Ceilometer and Heat, allowing them to extend their OpenStack experience to lab automation for a richer developer experience.
The series of ceilometer CHM 15k Nimbus continues with the same measurement technique and will be developed.
4, 2013 /PRNewswire/ -- OpenStack Summit -- Cloud Cruiser, the pioneer in cloud financial management, today announced support for OpenStack's latest release, Havana, and it's metering and monitoring module, Ceilometer.
8226; Cloud Base Measurement System includes laser ceilometer located close to the DVOR site for precision approach runway direction.
Ceilometer provides OpenStack resource instrumentation which can help support service monitoring and billing systems in the acquisition of customer usage data.
OpenStack Ceilometer will be supported with OpenStack Havana release http://www.
Vaisala has been working with the Bureau since the early 1980's and continues to work as a supplier of meteorological equipment and services for the organization across Australia and in Antarctica, with deliveries including autosondes, sounding systems, lightning sensors, barometers and ceilometers.
These may include elevated runway taxiway and stopway lights, approach lighting systems, visual approach slope indicator systems, signs and markers, wind direction indicators, ILS equipment, MLS equipment, radar reflectors, anemometers, ceilometers, transmissometers and security fencing.
In addition, seven to ten circulation and replacement units as well as three completely new ceilometers are planned.