transmissometer


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transmissometer

[‚tranz·mə′säm·əd·ər]
(engineering)
An instrument for measuring the extinction coefficient of the atmosphere and for the determination of visual range. Also known as hazemeter; transmittance meter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

transmissometer

transmissometer
An apparatus used to determine visibility by measuring the transmission of light through the atmosphere. It is the measurement source for determining runway visual range (RVR) and runway visibility value (RVV). A RVR system consists of a transmissometer projector and a transmissometer receiver. The projector and the receiver are mounted on towers either 250 or 500 ft apart. A known intensity of light is emitted from the projector and is measured by the receiver. See also runway visual range.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The shallower layer in the hydrothermal plume water column is thicker, and the depth of the peak of the deeper layer is identical to the transmissometer anomaly peak of the plume detected in 1993 (~1450m) [11].
It uses a transmissometer, but is more accurate than RVV since RVV is not based on visible targets.
At Maastricht, the company plans to show its AWOS, ATIS and RVR (transmissometer) solutions from the Metworx range.
The sensor types endorsed by ICAO are the transmissometer and the forward scatter sensor.
The first involved installing and commissioning transmissometers to measure the visibility alongside the runway.
Beam transmissometers, such as ac-spectra (AC-S) produced by Wetlabs, are the most commonly used devices for IOPs measurement [1-3].
Currently, predominant monitoring means include satellites, visibility sensors, transmissometers, and human-based observations.
The need to identify sources of error with the development of new fisheries technologies is documented in genetic studies (Blanca et al., 2009), in mark and recapture studies (Curtis, 2006), in the tracking of vessels with global position systems (GPS) (Palmer, 2008) and in measuring water clarity with beam transmissometers (Larson et al., 2007).
Pairing scientists with engineers, the 40-employee company makes fluorometers, transmissometers, scattering sensors and spectrophotometers, all of which collect data from the ocean and beam the information back to the surface, helping scientists learn about important changes in the food chain.