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FAQ: Difference between revisions
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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.
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== 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? == | ||
Fine Offset | Fine Offset sensors measure wind over 48-second intervals, divided into 24 2-second intervals. At the end of each 48-second period, they transmit the highest of those 24 values as 'Gust', and the average of those 24 values as 'Wind'. The console keeps writing the newly received Gust and wind values to the same area of console memory every 48 seconds, until the station logging interval time is reached, then it moves 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 extracts the Fine Offset Wind and Gust in each memory location, i.e. at the station logging interval. If Cumulus is running all the time, it uses each received Wind and Gust, i.e. new values every 48-seconds. | ||
* The Fine Offset console 'Gust' value becomes Cumulus 'Latest'. | |||
* The highest of Fine Offset 'Gust' | Cumulus, for various reasons, uses different terminology, and also has configuration settings which control how some of the wind values are displayed. | ||
* 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: | * Cumulus 'Average' can be calculated in 3 different ways: | ||
** The Fine Offset console 'Wind' value becomes, with default settings, Cumulus 'Average'. | ** 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''. | ** 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''. | ** 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). | ||
== How do I set up recording wind speeds in Cumulus, with Oregon Scientific and La Crosse stations == | == How do I set up recording wind speeds in Cumulus, with Oregon Scientific and La Crosse stations == | ||