Aviation Meteorology and METAR

METAR is a standard form for the reporting of weather commonly used in aviation with a format controlled by ICAO. The reports are typically produced at hourly or 30 minute intervals and originate from observing sites at airfields, military bases and other observing stations. The information is typically produced by automated weather observing systems (AWOS) with checking by meteorologists prior to transmission to aircraft and forecasting groups.

A wide range of weather types can be encoded in a METAR including visibility, precipitation and thunderstorm activity. Biral visibility and present weather sensors fulfil the ICAO requirements for the automated observation of a number of METAR parameters as specified in ICAO Annex 3, ICAO Annex 5, and WMO 8 Part I Chapters 9 and 14.

More information on the use of Biral sensors in aviation applications can be found in the Aviation Brochure.


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  • Cloud Ceilometer

    Model Number: CBME80B

    The Eliasson cloud ceilometer CBME80B is a compact and lightweight standalone instrument for measuring cloud base height and vertical visibility. …

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  • Digital Barometer MSB780X

    Model Number: MSB780X

    A precision barometer designed specifically for use in aviation applications where highly accurate, and reliable measurement combined with long term stability is required.

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  • ALS-2 Ambient Light Sensor

    Model Number: ALS-2

    Accurate and reliable determination of background light during all weather conditions

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  • BTD-300 Thunderstorm Detector

    Model Number: BTD-300

    The BTD-300 Thunderstorm Detector is a standalone sensor that reliably detects the presence of all forms of lightning to a range of 83 km

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  • VPF-750 Visibility & Present Weather Sensor

    Model Number: VPF-750

    The VPF-750 Visibility and Present Weather sensor is the most advanced in Biral’s product range. Its enhanced performance allows the reporting of freezing precipitation in addition to the weather codes typically available from a forward scatter sensor.

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  • VPF-730 Visibility & Present Weather Sensor

    Model Number: VPF-730

    The VPF-730 Visibility sensor provides accurate visibility and present weather measurement in a compact and robust package, making it well suited to both general and offshore aviation applications

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  • SWS-250 Visibility & Present Weather Sensor

    Model Number: SWS-250

    The SWS-250 is optimised for use in aviation applications where both visibility and extended present and past weather information is required

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  • SWS-200 Visibility & Present Weather Sensor

    Model Number: SWS-200

    The SWS-200 is designed for use in applications where accurate and reliable visibility measurements are required with the addition of WMO 4680 present weather codes

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