Meteorology visibility sensor DF320

meteorology visibility sensor
meteorology visibility sensor
meteorology visibility sensor
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Characteristics

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meteorology

Description

The DF320 visibility sensor uses forward scattering to measure visibility. It is used to measure synoptic visibility (Meteorological Optical Range) up to 70 km) and aeronautical visibility. Used in combination with a LU320 luminancemeter, it provides Runway Visual Range (RVR) and Aeronautical Visibility (AV). The forward scatter sensor DF320 is a sensordesigned for visibility measurements. DF320 consists of a white light source and areceiver placed off axis from the source. The intersection of the source's andreceiver's visual fields defines the analysisvolume. The suspended particles in thisvolume scatter the light in all directions. It delivers accurate and tracable values overa wide range (up to 70 Km) of measurements,even in harsh weather conditions.Associated with a luminancemeter, it issuitable built for aeronautical meteorologicalpurposes (Runway Visual Range-RVR, andAeronautic visibility-AV, as defined by ICAOstandards). It also can be used for other application suchas synoptic meteorology, road or harbor. To perfectly meet measurement height asrequested in ICAO rules, the DF320 uses a 4meters frangible tilting mast with adjustablemeasurement heads height. The meteorological optical range (MOR) isdetermined using the flux measurement of theforward scattered light. Low sensibilitydepending on the causes of the reduction ofthe visibility (fog, rain, snow hail) is obtainedby a low frequency modulation of a spreadspectra light in a large volume, avoiding allscintillation effects.

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VISIBILITY AND PRESENT WEATHER MEASUREMENT

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