FAQ: Difference between revisions

297 bytes added ,  14 November 2013
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m (→‎What do the various wind speeds in Cumulus correspond to, with Davis stations?: Update for if Cumulus is not operating continuously.)
 
== What do the various wind speeds in Cumulus correspond to, with Davis stations? ==
Davis stationsstation supplyfirmware supplies two windspeeds, a 3-second average and a 10-minute average (later versions of the firmware also supply a 2-minute average, Cumulus currently doesn't use this).
* The latest Davis 3-second average is treated by Cumulus as 'Latest' (available via <#wlatest>)
* The highest of the station's 3-second readings over the previous 10 (configerable by adding ''AvgSpeedMinutes=N'' in [[Cumulus.ini#Section:_Station]] where 'N' is number of) minutes becomes the Cumulus 'Gust (available via <#wgust>)
* The Davis 10-minute average is the Cumulus 'Average' (available via <#wspeed>).
Note that if you sample these readings at shorter (real time) intervals it is possible for Cumulus 'Latest' to be lower than Cumulus 'Average' because approximately half of the 3-second wind speeds will be higher and half of them lower than the 10-minute average.
If the Cumulus figure seems lower than the Davis figure see [[#My_Davis_station_shows_a_higher_maximum_wind_speed_than_Cumulus]].
 
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== What do the various wind speeds in Cumulus correspond to, with Fine Offset stations? ==
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