 Ceiling projector exterior
 Interior of a ceiling projector
 Alidade for use with a ceiling projector The ceiling projector or cloud searchlight is used to measure the height of the base of clouds (called the ceiling) above the ground. It is used in conjunction with an alidade, usually positioned 1000 ft (304.8 m) away and wherever possible set at the same level. Image File history File linksMetadata Size of this preview: 452 × 599 pixelsFull resolution (1232 × 1632 pixel, file size: 710 KB, MIME type: image/jpeg) Exterior of a ceiling projecter. ...
Image File history File linksMetadata Size of this preview: 452 × 599 pixelsFull resolution (1232 × 1632 pixel, file size: 710 KB, MIME type: image/jpeg) Exterior of a ceiling projecter. ...
Image File history File linksMetadata Size of this preview: 794 × 599 pixelsFull resolution (1632 × 1232 pixel, file size: 593 KB, MIME type: image/jpeg) Interior shot of a ceiling projecter. ...
Image File history File linksMetadata Size of this preview: 794 × 599 pixelsFull resolution (1632 × 1232 pixel, file size: 593 KB, MIME type: image/jpeg) Interior shot of a ceiling projecter. ...
Image File history File linksMetadata Size of this preview: 794 × 599 pixelsFull resolution (1632 × 1232 pixel, file size: 723 KB, MIME type: image/jpeg) Alidade as used with a ceiling projector with a 300 m or 1000 ft baseline. ...
Image File history File linksMetadata Size of this preview: 794 × 599 pixelsFull resolution (1632 × 1232 pixel, file size: 723 KB, MIME type: image/jpeg) Alidade as used with a ceiling projector with a 300 m or 1000 ft baseline. ...
Cumulonimbus capillatus incus floating over Swifts Creek, Victoria in Australia A cloud is a visible mass of condensed droplets or frozen crystals suspended in the atmosphere above the surface of the Earth or another planetary body. ...
Edisons classical searchlight cart. ...
A simple alidade for use with a ceiling projector The Alhidade or alidade is the part of a theodolite that rotates around the vertical axis, and that bears the horizontal axis around which the telescope (or visor, in early telescope-less instruments) turns up or down. ...
The projector is normally set at 90°, although 71° 31' may be used, in relation to the terrain. The projector consists of a 430 W incandescent bulb set in a weatherproof housing. Inside the housing are two mirrors; the first, above the bulb, reflects the light downwards to the second mirror, that then reflects the light upwards to the cloud. Both mirrors are focused to produce a high intensity beam of light that renders a visible spot on the base of the cloud. Projectors are used for displaying an image on a projection screen or similar surface for the view of an audience. ...
A degree (in full, a degree of arc, arc degree, or arcdegree), usually symbolized °, is a measurement of plane angle, representing 1ï¼360 of a full rotation. ...
The watt (symbol: W) is the SI derived unit of power, equal to one joule per second. ...
Incandescence is the release of electromagnetic radiation from a hot body due to its high temperature. ...
A mirror, reflecting a vase. ...
The alidade is mounted on a post at a height of 5 ft (1.524 m) from the ground. It consists of an arm with a pointer and open sight at one end and a rubber eyepiece at the other. The arm is mounted onto a curved scale that is marked both in meters and the coded cloud height (feet). The observer looks through the eyepiece and sets the sight onto the spot projected on the cloud and reads the height from the attached scale.
When the cloud is thin the beam of light may penetrate into the cloud. The observer should read the scale where the light first enters the cloud and not at the top. However, a remark may be made as to how far into the cloud the light was able to penetrate as this may be useful. In the case of fog or blizzard conditions the observer should read the scale where the beam disappears. Evening fog obscures Londons Tower Bridge from passers by. ...
Look up Blizzard in Wiktionary, the free dictionary. ...
Image File history File links Commons-logo. ...
Wikimedia Commons logo by Reid Beels The Wikimedia Commons (also called Commons or Wikicommons) is a repository of free content images, sound and other multimedia files. ...
See also
All of the trigonometric functions of an angle θ can be constructed geometrically in terms of a unit circle centered at O. Trigonometric functions: , , , , , In mathematics, the trigonometric functions (also called circular functions) are functions of an angle; they are important when studying triangles and modeling periodic phenomena, among many other...
A triangle is one of the basic shapes of geometry: a polygon with three vertices and three sides which are straight line segments. ...
Reference Department of Transport (Canada) - Meteorological Branch - Ceiling Projectors and Associated Equipment - Manual 70 | Meteorological instrumentation and equipment (Earth based) | | Anemometer | Barograph | Barometer | Ceiling balloon | Ceiling projector | Ceilometer | Dark adaptor goggles | Disdrometer | Field mill | Hygrometer | Ice Accretion Indicator | LIDAR | Lightning detector | Nephelometer | Nephoscope | Pyranometer | Radiosonde | Rain gauge | Snow gauge | SODAR | Solarimeter | Sounding rocket | Stevenson screen | Sunshine recorders | Thermograph | Thermometer | Weather balloon | Weather radar | Weather vane | Windsock | Wind profiler Satellite image of Hurricane Hugo with a polar low visible at the top of the image. ...
An anemometer is a device for measuring the velocity or the pressure of the wind, and is one instrument used in a weather station. ...
A barograph is a recording aneroid barometer. ...
A barometer is an instrument used to measure atmospheric pressure. ...
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. ...
Laser 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. ...
A disdrometer is an instrument used to measure the drop size distribution and velocity of falling precipitation. ...
Field mill is a specialized instrument used for measuring the strength of electrical fields in the atmosphere near thunderstrom clouds. ...
The interior of a Stevenson screen showing a motorized psychrometer Hygrometers are instruments used for measuring humidity. ...
Standard Ice Accretion Indicator (upside down) The Ice Accretion Indicator is an L-shaped piece of aluminium 38 cm (14. ...
This article or section does not adequately cite its references or sources. ...
Lightning detector at the Kennedy Space Center in Florida. ...
A nephelometer is an instrument for measuring suspended particulates in a liquid. ...
Nephoscope is instrument for measuring the altitude, direction, and velocity of movement of clouds. ...
A pyranometer is a type of actinometer used to measure broadband solar irradiance on a planar surface. ...
radiosonde with measuring instruments A radiosonde (Sonde is German for probe) is a unit for use in weather balloons that measures various atmospheric parameters and transmits them to a fixed receiver. ...
Standard Rain Gauge Tipping Bucket Rain Gauge Recorder Close up of a Tipping Bucket Rain Gauge Recorder chart A rain gauge is a type of instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation (as opposed to solid precipitation that is measured by a...
Snow Gauge A snow gauge is a meteorological instrument used to record the depth of snowfall at a specific location. ...
SODAR (sonic detection and ranging) - meteorological instrument which priciple of operation is based on sound waves scattering by atmosheric turbulence. ...
A solarimeter is a pyranometer used to measure combined direct and diffuse solar radiation. ...
A sounding rocket, sometimes called an elevator research rocket, is an instrument-carrying suborbital rocket designed to take measurements and perform scientific experiments during its flight. ...
Exterior of a Stevenson screen Interior of a Stevenson screen A Stevenson screen is a meteorological screen to shield instruments against precipitation and direct heat radiation from outside sources, while still allowing air to circulate freely around them. ...
Sunshine Recorders are used to indicate the amount of sunshine at a given location. ...
A thermograph is a recording thermometer. ...
It has been suggested that List of temperature sensors be merged into this article or section. ...
Rawinsonde weather balloon just after launch. ...
To meet Wikipedias quality standards, this article or section may require cleanup. ...
Weather vane Weather cock Aerovane A weather vane, also called a wind vane, is a movable device attached to an elevated object such as a roof for showing the direction of the wind. ...
A windsock is a large, conical, open-ended tube designed to indicate wind direction and relative wind speed. ...
A wind profiler is a piece of weather observing equipment that uses sound waves to detect the wind speed and direction at various elevations above the ground. ...
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