
	Where results make sense

Topic: Ceilometer

Related Topics

Hellsing

In the News (Sat 26 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Chilbolton Observatory
		Scientists use the ceilometer to measure the sizes of precipitation particle and to discover whether a cloud colder than zero degrees is made up of ice or water.
		The latest results from the ceilometer can be found on the Chilbolton Weather Web.
		To see measurements taken with the IR lidar ceilometer look in the research section of the site.
	www.chilbolton.rl.ac.uk /ceilometer.htm (105 words)

	Ceilometer: Definition and Links by Encyclopedian.com
		A ceilometer is used to measure the height of the cloud base.
		A Ceilometer is a device 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.
	www.encyclopedian.com /ce/Ceilometer.html (172 words)

	* Ceilometer- (Meteorology): Definition
		A light beam is projected upward on to the cloud base; the reflected light is detected by a photocell and the height is determined by triangulation.
		CEILOMETER An instrument that is used to measure the angular elevation of a projected light on the base of a cloud.
		Ceilometer- A device used to evaluate the height of clouds or the vertical visibility into a surface-based obscuration.
	en.mimi.hu /meteorology/ceilometer.html (336 words)

	Brainboost - what does a ceilometer measure
		Ceilometer measures cloud base height using a sensor of pulsed laser..
		The ceilometer measures ceiling height, or the distance from the ground to the bottom of the clouds.
		As a light pulse traverses in the air part of it is backscattered by aerosols, and the ceilometer measures the amount of backscatter as the function of altitude.
	www.brainboost.com /search.asp?Q=what+does+a+ceilometer+measure&lfmq=1 (510 words)

	Ceilometer Data from Research Vessel Ron H. Brown
		The ceilometer data set was acquired on the Research Vessel Ron H. Brown under the direction of principal investigator Allen B. White during the KWAJEX field campaign.
		The maximum range of the ceilometer is 7620 m, and the resolution in the profiles is 15 m (50 ft).
		A comparison of ceilometer data recorded on Manus Island and onboard the R/V Discoverer during the 1996 Combined Sensor Program is included in Post et al.
	daac.gsfc.nasa.gov /fieldexp/TRMM_FE/kwajex/rhb_ceilometer.shtml (632 words)

	Ceilometer (Site not responding. Last check: 2007-10-26)
		An optical drum ceilometer uses triangulation to determine the height of a spot of light projected onto the base of the cloud.
		Because of light diffusion by air molecules, ceilometers are not effective beyond 4,000 m (13,123 ft) in height.
		As an example, depending on the threshold used, falling Diamond dust (Ice Crystals) may cause the ceilometer to report a cloud height of zero, even though the sky is clear.
	www.kiwipedia.com /ceilometer.html (360 words)

	An Annotated Bibliography of Avian Interactions with Utility Structures
		Quantification of nocturnal passerine migration with a portable ceilometer.
		Portable ceilometers may be used to study the orientation and magnitude of migration.
		One method is based on the physical dimensions of the space sampled by the ceilometer; the other, on a correlation between ceilometer counts and simultaneous radar traffic rates.
	www.energy.ca.gov /pier/environmental/avian_bibliography/one_rec.php?InNum=2900 (147 words)

	Microprocessor-driven laser ceilometers - Patent 4511249
		An improvement to a laser ceilometer and like instruments comprises a laser diode array which includes a plurality of laser diodes, and an array driver driving the laser diode array in accordance with commands from a microprocessor.
		As is known in the art, ceilometers of the type in question here measure cloud height in a stepwise fashion by gating avalanche photodiode 4 in such a fashion that the microprocessor awaits an output therefrom during predetermined intervals of time.
		Thus, this ceilometer (which measures from the top of its range to the bottom of its range) only registers radiation incident upon avalanche photodiode 4 if that radiation is detected within a certain maximum interval of time.
	www.freepatentsonline.com /4511249.html (2133 words)

	SPRING MIGRATION STUDIED BY MIST-NETTING, CEILOMETER, AND RADAR (Site not responding. Last check: 2007-10-26)
		Ceilometer data were taken for about 1 h between 21:00 and mid- night each night.
		Thus, we urge ornithologists to use the ceilometer technique and direct visual observation of the readily available marine radars on small boats to determine the direction and numbers of nocturnal, low altitude migrants.
		SUMMARY Observations of nocturnal bird migration with a short range, high resolution search radar and with a ceilometer light beam were compared with the next day's captures of birds in mist nets.
	elibrary.unm.edu /sora/JFO/v052n03/p0177-p0190.html (5755 words)

	Ceilometers for cloud height measurement - Vaisala (Site not responding. Last check: 2007-10-26)
		Ceilometers incorporate diode laser based LIDAR (Light Detection And Ranging) technology for measurement of cloud base height.
		In the method short light pulses emitted by a laser diode are focused to a collimated beam and transmitted into the atmosphere.
		As opposed to the traditional ceilometer design in which transmitter and receiver have their own optics, the coaxial design uses common light path for both emitting and receiving, leading to a strong and stable signal for the whole measurement range.
	www.vaisala.com /businessareas/instruments/products/cloudheight/vaisala%20ceilometer%20technology.html (230 words)

	ceilometer - Search Results - MSN Encarta
		A ceilometer is a device using a laser or other light source to determine the height of a cloud base.
		* An optical drum ceilometer uses triangulation to determine the height of a spot of light...
		The 8339 Laser Ceilometer measures cloud height and thickness, in addition to...
	encarta.msn.com /ceilometer.html (165 words)

	Laser Ceilometer Measures 4 Cloud Layers At Once
		Able to measure cloud height from 0 to 30,000 feet (9 km), the 8339 is the only ceilometer to penetrate to such heights using an eye-safe, low power, laser transmitter.
		The 8339 Laser Ceilometer is also the first to simultaneously detect and measure up to four layers of clouds, including the thickness of individual layers.
		The 8339 Laser Ceilometer is the only ceilometer to output standard cloud information, such as vertical visibility, ground-based obscurations, and cloud base measurements, as well as the National Weather Service Sky Condition Algorithm, which provides information on sky coverage and variable ceilings.
	www.metrologyworld.com /content/news/article.asp?docid={173C4417-E6E1-479B-84E3-BBC0E1B5639C}&VNETCOOKIE=NO (419 words)

	Example of ceilometer data (McGill U.)
		The ceilometer is designed to find the cloud ceiling level, that is, the altitude of the base of clouds.
		This is the raw data used by the ceilometer to estimate the cloud altitude.
		As illustrated by this example, although it is designed to observe clouds, the ceilometer can also be used to study smog or haze, and rain.
	www.radar.mcgill.ca /data_examples_ceilo.html (287 words)

	The McGill University Laser Ceilometer (Site not responding. Last check: 2007-10-26)
		The ceilometer, thanks to very useful computer software, gives profiles of returned power from the ground up to 4 kilometers high, as well as a record of cloud base height.
		Because of its relatively short wavelength corresponding to the infra-red portion of the electromagnetic spectrum, the ceilometer is sensitive to particles as small as aerosols, such as dust, and as large as precipitation, such as snowflakes.
		Hence, the ceilometer is a very useful instrument that can be used for research or experimental purposes, as well as operational applications (often being used at airports).
	www.radar.mcgill.ca /ceilometer.html (223 words)

	Belfort Instrument - Cloud
		This ceilometer has a detection range up to 25,000 feet and is very accurate.
		The ceilometer can be carried in one hand and can operate from a 12 VDC battery or solar supply, or from AC mains power.
		The cyclic self-testing completely covers the ceilometerâs operation and reports current status in every output message, There are not periodic calibrations or adjustments required.
	www.digiwx.com /content/cloud.cfm (383 words)

	Cloud Height Sensors - Ceilometer Information - Mesotech International, Inc.
		The CBME80 cloud ceilometer is stand-alone instrument designed for fixed and mobile installations.
		This ceilometer has a detection range up to 25,000 feet and is very accurate.
		With the BE360, ceilometer data can be viewed remotely.
	www.mesotech.com /products/sensors/ceilometers.htm (204 words)

	cloudsen
		The ceilometer measures cloud only once it has passed directly over the station, and thus, is evaluating downwind cloud cover.
		P10 X. As well, the vertical visibility as reported by the ceilometer will now be included as a cloud layer for processing.
		The tendering process for the next procurement is underway, and if a new ceilometer is selected that is superior to the current one, the feasibility of retrofitting sites that have displayed this problem will be investigated.
	www.k3pgp.org /cloudsen.htm (974 words)

	Ceilometer CT25K
		The ceilometer is an instrument primarily for detecting cloud height.
		A ceilometer uses Light Ranging and Detection (LIDAR) technology to determine the height of a target from which a pulse of laser light was reflected.
		Similar to radar, the range of a target such as the cloud base can be determined by the time it takes for a pulse of light to leave the ceilometer, reach the target, and arrive back at the ceilometer after being reflected.
	grison.colorado.edu /pao-lower/PlatteCeilometer.html (320 words)

	SEAS Experiment
		The CT25K Ceilometer measures cloud-bottom heights and vertical visibilities based upon pulsed diode laser lidar technology.
		In an assumption that Lidar Ratio is constant over the range observed, it is possible to invert the backscatter profile to obtain the extinction coefficient profile.
		As a result, we believe that more extensive analysis of Ceilometer data at other altitudes may allow for its use as a visibility indicator throughout the lower boundary layer.
	www.soest.hawaii.edu /higear/projects/seas_11.html (240 words)

	Cloud Height Sensor (Site not responding. Last check: 2007-10-26)
		The Cloud Height Sensor (the ceilometer), determines cloud height and levels in the atmosphere.
		The ceilometer works by transmitting a pulse of laser light into the atmosphere and sensing the light return as it is reflected back toward the ceilometer by objects in its path.
		The ceilometer measures how much time it takes a pulse of light to travel from the Ceilometer Transmitter, through the atmosphere, to reflect off a cloud, and to return to the Ceilometer Receiver.
	imnh.isu.edu /digitalatlas/clima/tour/meter.htm (224 words)

	Measuring Cloud Height \| Laser Ceilometer Model 8340 \| Weather Instruments
		The 8340 Laser Ceilometer measures cloud height and thickness, in addition to vertical visibility, detecting up to four cloud layers simultaneously to a distance of 40,000 vertical feet.
		Depending on the current and historical sky conditions, an adaptive algorithm determines the number of returns needed to maintain accuracy.
		Proprietary algorithms and digital techniques from 20 years of cloud height detection research and manufacturing are applied, allowing the 8340 ceilometer to provide accurate information even in difficult circumstances.
	www.allweatherinc.com /meteorological/8340_ceilometer.html (501 words)

	Oceanit reaches skyward with latest product - Pacific Business News (Honolulu): (Site not responding. Last check: 2007-10-26)
		Oceanit's 3-D ceilometer has the advantage of measuring an area of at least 10 miles in diameter, compared with the 6-inch-diameter area the current system uses for its data collection, which is not comprehensive enough during rapid cloud movement, Sullivan said.
		The 3-D ceilometer project, started in 1996, obtained two Small Business Innovation Research awards for a total of $300,000 to develop a prototype of the device, which was tested at Dulles International Airport outside Washington, D.C., for a year.
		As Oceanit's ceilometer project team of two scientists and an engineer focuses on the Navy contract, the company is solidifying plans to expand the technology's applications and take it to market in under two years, said Ian Kitajima, Oceanit's marketing manager.
	pacific.bizjournals.com /pacific/stories/2002/06/03/smallb2.html (896 words)

	Low Power Laser Ceilometer - Airport International
		The 8340 is the first ceilometer to use an eye-safe, low power, laser transmitter to measure the height of any cloud type, including Cirrus ice clouds, from 0 to 40,000 feet (13 km).
		The system is also the only ceilometer capable of simultaneously detecting and measuring up to four layers of clouds, providing reliable readings for pilots and meteorologists in even the most complex aviation weather situations.
		It is the only ceilometer to use an eye-safe, low-power laser to transmit light pulses to the cloud base, up to 40,000 feet (13 km).
	www.airport-int.com /categories/low-power-laser-ceilometer/low-power-laser-ceilometer.asp (808 words)

	NationMaster - Encyclopedia: Snow gauge
		A ceiling balloon cabinet A fully inflated ceiling balloon Diagram of a filler stand Regulator valve and pressure guages attached to helium cylinder A ceiling balloon is used by meteorologists to determine the height of the base of clouds above ground level during daylight hours.
		Ceilometer A Ceilometer is a device using a laser or other light source to determine the height of a cloud base.
		Dark adaptor goggles The Dark adaptor goggles are one of the lesser known tools in the field of meteorology.
	www.nationmaster.com /encyclopedia/Snow-gauge (1359 words)

	A PORTABLE CEILOMETER TECHNIQUE FOR STUDYING LOW-LEVEL NOCTURNAL MIGRATION (Site not responding. Last check: 2007-10-26)
		On a cool, moonless night two ceilometer lamps were wired in series with a 12-volt car battery, and the lights were directed down a country road that was straight, paved, and unlighted.
		SUMMARY A simple, inexpensive ceilometer technique is described for obtaining data on the nocturnal migration of birds.
		Since fixed- beam eeilometers at airport weather stations are rapidly being replaced by rotating-beam devices that are unsuitable for migration studies, I have constructed and tested a small, portable eeilometer apparatus for visual studies of nocturnal migration.
	elibrary.unm.edu /sora/JFO/v040n04/p0309-p0320.html (5291 words)

	AIA News & Events
		Able to measure cloud height from 0 to 30,000 feet (9 km), the 8339 is the only ceilometer to penetrate to such heights using an eye-safe, low power, laser transmitter.
		The 8339 Laser Ceilometer is also the first to simultaneously detect and measure up to four layers of clouds, including the thickness of individual layers.
		The 8339 Laser Ceilometer is the only ceilometer to output standard cloud information, such as vertical visibility, ground-based obscurations, and cloud base measurements, as well as the National Weather Service Sky Condition Algorithm, which provides information on sky coverage and variable ceilings.
	www.aia-aerospace.org /aianews/inews_detail.cfm?Content_ID=130 (580 words)

	NSDL AVC HOME
		Capping inversion: It is an elevated inversion layer that caps a convective boundary layer, keeping the convective elements from rising higher into the atmosphere.
		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.
		Centrifugal force: It is a force directed outward, away from the center of a rotating object; equal in magnitude to the centripetal force but in the opposite direction.
	education.arm.gov /nsdl/Library/glossary.shtml (6556 words)

Try your search on: Qwika (all wikis)