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Wind measurement: Difference between revisions
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Wind speed is measured using an [http://en.wikipedia.org/wiki/Anemometer anemometer]. It is typically made up of cups attached to spindle. The stronger the wind the faster the cups rotate and the higher the reading. Several readings should be taken over a couple of minutes and an average taken. The measurement is sometimes made in [http://en.wikipedia.org/wiki/Knot_%28unit%29 knots] but any speed unit is possible. | Wind speed is measured using an [http://en.wikipedia.org/wiki/Anemometer anemometer]. It is typically made up of cups attached to spindle. The stronger the wind the faster the cups rotate and the higher the reading. Several readings should be taken over a couple of minutes and an average taken. The measurement is sometimes made in [http://en.wikipedia.org/wiki/Knot_%28unit%29 knots] but any speed unit is possible. | ||
Cumulus [[Cumulus. | Cumulus [[Cumulus.ini_(Cumulus_1)|supports]]: | ||
::0 = m/s (metres per second) | ::0 = m/s (metres per second) | ||
::1 = mph (miles per hour) | ::1 = mph (miles per hour) | ||
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== Weather Stations and Cumulus == | == Weather Stations and Cumulus == | ||
*If you have a Davis weather station see [[# | *If you have a Davis weather station see [[FAQ#What_do_the_various_wind_speeds_in_Cumulus_1_correspond_to.2C_with_Davis_stations.3F|FAQ: What do the various wind speeds in Cumulus correspond to with Davis stations]] | ||
*If you have a Fine Offset station, see [[# | *If you have a Fine Offset station, see [[FAQ#What_do_the_various_wind_speeds_in_Cumulus_1_correspond_to.2C_with_Fine_Offset_stations.3F|FAQ: What do the various wind speeds in Cumulus correspond to with Fine Offset stations]] | ||
* For Oregon Scientific and La Crosse stations see [[# | * For Oregon Scientific and La Crosse stations see [[FAQ#How_do_I_set_up_recording_wind_speeds_in_Cumulus_1.2C_with_Oregon_Scientific_and_La_Crosse_stations| FAQ: How do I set up recording wind speeds in Cumulus with Oregon Scientific and La Crosse stations]] | ||
==Compensation== | ==Compensation== | ||
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*In addition to a Wind Speed multiplier, Cumulus allows for a Wind Gust multiplier. However, it is generally felt that wind gusts should not take into account their height from ground level therefore a multiplier of 1 is acceptable. | *In addition to a Wind Speed multiplier, Cumulus allows for a Wind Gust multiplier. However, it is generally felt that wind gusts should not take into account their height from ground level therefore a multiplier of 1 is acceptable. | ||
==Beaufort Scale== | ==Beaufort Scale== | ||
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. | 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. Note that the scale applies to sustained (average) wind speeds. | ||
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. | ||