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== What do the various wind speeds in Cumulus correspond to, with Fine Offset stations? ==

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 '''overwriting''' 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.

Fine Offset sensors measure wind over 48-second intervals, divided into 24 2-second intervals. At the end of each 48-second period, the outdoor unit (anemometer) transmits two values, the "Gust" is calculated from the number of revolutions of the anemometer in two seconds and the "Average" from the number of revolutions in 48 seconds. The console keeps '''overwriting''' 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.

*While Cumulus is running, it reads the current wind speeds (and direction) every 10 seconds. There are new values only every 48 seconds (i.e. every fourth or fifth read)

*While Cumulus is running, it reads the current wind speeds (and direction) every 10 seconds. There are new values only every 48 seconds (i.e. every fourth or fifth read).

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 ~~becomes Cumulus~~ 'Latest'.

* The Fine Offset console 'Gust' value is labelled 'Latest' by Cumulus.

* The highest of the Fine Offset 'Gust' values over the previous 10 minutes becomes Cumulus 'Gust'. Note that the ~~WMO~~ definition of a wind gust is the mean wind speed over a 2 to 3 second sample period (not the maximum instantaneous wind speed).

* The highest of the Fine Offset 'Gust' values over the previous 10 minutes becomes what Cumulus reports as the 'Gust' speed.

Note that the World Meteorological Office definition of a wind gust is the mean wind speed over a 2 to 3 second sample period (not the maximum instantaneous wind speed).

* Cumulus 'Average' can be calculated in 3 different ways:

** The default: If 'Calculate 10-min wind average' is not selected on the Station Settings screen, the console 'Wind' value is ~~used~~.

** The default: If 'Calculate 10-min wind average' is not selected on the Station Settings screen, the console 'Wind' value is reported.

** If 'Calculate 10-min wind average' is selected, then by default the average of the Fine Offset 'Gust' values read over the previous N (configurable, defaults to 10) minutes is ~~used~~.

** If 'Calculate 10-min wind average' is selected, but 'Use speed for avg calculation' is not selected; then by default the average of the Fine Offset 'Gust' values read over the previous N (configurable, defaults to 10) minutes is reported.

** If 'Calculate 10-min wind average' and 'Use speed for avg calculation' are both selected, the average of the Fine Offset 'Wind' values read over the previous N (configurable, defaults to 10) minutes is ~~used~~.

** If 'Calculate 10-min wind average' and 'Use speed for avg calculation' are both selected; the average of the Fine Offset 'Wind' values read over the previous N (configurable, defaults to 10) minutes is reported.

Select value for 'N' using ''AvgSpeedMinutes=N'' in [[Cumulus.ini#Section:_Station]].

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 == What do the various wind speeds in Cumulus correspond to, with Fine Offset stations?  ==
-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 '''overwriting''' 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.
+Fine Offset sensors measure wind over 48-second intervals, divided into 24 2-second intervals. At the end of each 48-second period,  the outdoor unit (anemometer) transmits two values, the "Gust" is calculated from the number of revolutions of the anemometer in two seconds and the "Average" from the number of revolutions in 48 seconds. The console keeps '''overwriting''' 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.
-*While Cumulus is running, it reads the current wind speeds (and direction) every 10 seconds. There are new values only every 48 seconds (i.e. every fourth or fifth read)
+*While Cumulus is running, it reads the current wind speeds (and direction) every 10 seconds. There are new values only every 48 seconds (i.e. every fourth or fifth read).
 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 becomes Cumulus 'Latest'.
+* The Fine Offset console 'Gust' value is labelled 'Latest' by Cumulus.
-* The highest of the Fine Offset 'Gust' values over the previous 10 minutes becomes Cumulus 'Gust'.  Note that the WMO definition of a wind gust is the mean wind speed over a 2 to 3 second sample period (not the maximum instantaneous wind speed).
+* The highest of the Fine Offset 'Gust' values over the previous 10 minutes becomes what Cumulus  reports as the 'Gust' speed.
+Note that the World Meteorological Office definition of a wind gust is the mean wind speed over a 2 to 3 second sample period (not the maximum instantaneous wind speed).
 * Cumulus 'Average'  can be calculated in 3 different ways:
-** The default: If 'Calculate 10-min wind average' is not selected on the Station Settings screen, the console 'Wind' value is used.
+** The default: If 'Calculate 10-min wind average' is not selected on the Station Settings screen, the console 'Wind' value is reported.
-** If 'Calculate 10-min wind average' is selected, then by default the average of the Fine Offset 'Gust' values read over the previous N (configurable, defaults to 10) minutes is used.
+** If 'Calculate 10-min wind average' is selected, but 'Use speed for avg calculation' is not selected; then by default the average of the Fine Offset 'Gust' values read over the previous N (configurable, defaults to 10) minutes is reported.
-** If 'Calculate 10-min wind average' and 'Use speed for avg calculation' are both selected, the average of the Fine Offset 'Wind' values read over the previous N (configurable, defaults to 10) minutes is used.
+** If 'Calculate 10-min wind average' and 'Use speed for avg calculation' are both selected; the average of the Fine Offset 'Wind' values read over the previous N (configurable, defaults to 10) minutes is reported.
 Select value for 'N' using ''AvgSpeedMinutes=N'' in [[Cumulus.ini#Section:_Station]].