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Revision as of 16:34, 4 September 2013

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→‎What do the various wind speeds in Cumulus correspond to, with Fine Offset stations?: Minor rewrite, to split information about reading from logger between all points instead of just saying at end.
m (→‎What do the various wind speeds in Cumulus correspond to, with Fine Offset stations?: Minor rewrite, to split information about reading from logger between all points instead of just saying at end.)
 
== What do the various wind speeds in Cumulus correspond to, with Fine Offset stations? ==
Fine Offset stationssensors measure wind over 48-second intervals, divided into 24 2-second intervals. At the end of each 48-second period, they reporttransmit the highest of those 24 values as 'Gust', and the average of those 24 values as 'Wind'. CumulusThe console keeps writing the newly received Gust and wind values to the same area of console memory every 48 seconds, foruntil variousthe reasonsstation logging interval time is reached, usesthen differentit terminologymoves on to the next memory location, leaving the last values it wrote in the previous console memory location. If Cumulus is not running all the time, on restart it works through the console memory locations and alsoextracts hasthe configurationFine settingsOffset whichWind controland howGust somein ofeach memory location, i.e. at the windstation logging interval. If Cumulus is running all the time, it uses each received Wind and Gust, i.e. new values areevery displayed48-seconds.
 
* The Fine Offset console 'Gust' value becomes Cumulus 'Latest'. ▼
Cumulus, for various reasons, uses different terminology, and also has configuration settings which control how some of the wind values are displayed.
* The highest of Fine Offset 'Gust' values over the previous 10 minutes becomes Cumulus 'Gust'.
▲* The Fine Offset console 'Gust' value (every 48 seconds if Cumulus is running, or at every station logging interval if restarting) becomes Cumulus 'Latest'.
* The highest of the above Fine Offset 'Gust' values over the previous 10 minutes becomes Cumulus 'Gust'. (If Cumulus is restarting and station logging interval is 10 minutes or greater, Cumulus Latest and Cumulus Gust cannot be properly differentiated).
* Cumulus 'Average' can be calculated in 3 different ways:
** The Fine Offset console 'Wind' value (every 48 seconds if Cumulus is running, or at every station logging interval if restarting) becomes, with default settings, Cumulus 'Average'.
** All Fine Offset 'Gust' values read over a 10 minute interval are averaged to become Cumulus 'Average' if in the ''Settings'' frame of the '''Station''' screen in the Configuration menu, you select ''Calculate 10-min wind average''. (If Cumulus is restarting and station logging interval is 10 minutes or greater, Cumulus Latest and Cumulus Average cannot be properly differentiated).
** All Fine Offset 'Wind' values read over a 10 minute interval are averaged to become Cumulus 'Average' if in the ''Settings'' frame of the '''Station''' screen in the Configuration menu, you select ''Calculate 10-min wind average'' and also set the next option ''Use 'speed' for avg calculation''. (If Cumulus is restarting and station logging interval is 10 minutes or greater, Cumulus Latest and Cumulus Average cannot be properly differentiated).
Note if Cumulus is being re-started, the Fine Offset 'Gust' and 'Wind' values will initially only be available at the station's logging interval, so the last two options may only be averaging a couple of readings.
 
== How do I set up recording wind speeds in Cumulus, with Oregon Scientific and La Crosse stations ==
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