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→What do the various wind speeds in Cumulus correspond to, with Davis stations?: Update for if Cumulus is not operating continuously.
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== What do the various wind speeds in Cumulus correspond to, with Davis stations? == | == What do the various wind speeds in Cumulus correspond to, with Davis stations? == | ||
Davis | Davis station firmware 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 Davis 3-second average is treated by Cumulus as 'Latest' (available via <#wlatest>) | * 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>). | * 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. | 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]]. | If the Cumulus figure seems lower than the Davis figure see [[#My_Davis_station_shows_a_higher_maximum_wind_speed_than_Cumulus]]. | ||
Davis | Davis station loggers cannot store the same information as the firmware frequently supplies to Cumulus, so if you restart Cumulus and the software attempts to catch up from the station logger some wind speed measurements transferred to Cumulus may seem odd. | ||
== What do the various wind speeds in Cumulus correspond to, with Fine Offset stations? == | == What do the various wind speeds in Cumulus correspond to, with Fine Offset stations? == | ||