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Wind measurement: Difference between revisions
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==Compensation== | ==Compensation== | ||
Raising an anemometer to a height of 10 | Raising an anemometer to a height of 10 metres is not always possible, especially for weather enthusiasts, therefore one must build in a compensation figure (or multiplier) in order to take into account the height factor. | ||
It is generally accepted that the following formula will provide a multiplier to compensate for lower height anemometer. | It is generally accepted that the following formula will provide a multiplier to compensate for lower height anemometer. | ||
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==Wind Multiplier in Cumulus== | ==Wind Multiplier in Cumulus== | ||
Within Cumulus it is possible to set a multiplier which will be used to upscale your actual reading from your anemometer to take into account | Within Cumulus it is possible to set a multiplier which will be used to upscale your actual reading from your anemometer to take into account its lower height. Use the formula above (or the table of examples) to locate your multiplier. Remember you are measuring the height of your anemometer from the ground in meters. | ||
Within Cumulus click the 'Configuration' menu then 'Calibration'. Locate the 'Windspeed multiplier' and change this from its default of 1 to the value from above. Note Cumulus only accepts two decimal places if you have calculated using the formula rather than the table. | Within Cumulus click the 'Configuration' menu then 'Calibration'. Locate the 'Windspeed multiplier' and change this from its default of 1 to the value from above. Note Cumulus only accepts two decimal places if you have calculated using the formula rather than the table. | ||
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==Beaufort Scale== | ==Beaufort Scale== | ||
The [http://en.wikipedia.org/wiki/Beaufort_scale Beaufort Scale] was developed as a common | The [http://en.wikipedia.org/wiki/Beaufort_scale Beaufort Scale] was developed as a common way to measure and describe wind speed prior to any accurate devices. Initially it was based on the condition of the sea however the modern Beaufort scale incorporates land observations too. | ||
Using the table below you could asses if your Calibration within Cumulus is roughly accurate based on observations. | Using the table below you could asses if your Calibration within Cumulus is roughly accurate based on observations. | ||