Charts - Wind charts - Revision history

HansR: /* Windrun configuration */

2022-04-02T11:25:57Z

Windrun configuration

← Older revision		Revision as of 11:25, 2 April 2022
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	=== Windrun configuration ===		=== Windrun configuration ===
	The Windrun is a bit more automated but still the user has to define the class width through the parameter ''WindrunClassWidth'' (which has a default of 75). Again the default is OK for a ''distance unit of km'', reconsider if using imperial. '''Note that if you use a speed unit of m/s, the distance is in km'''.		The Windrun is a bit more automated but still the user has to define the class width through the parameter ''WindrunClassWidth'' (which has a default of 75). Again the default is OK for a ''distance unit of km'', reconsider if using imperial. '''Note that if you use a speed unit of m/s, the distance of the Windrun will be in km'''.

	With the ''WindrunClassWidth'' the following is calculated:		With the ''WindrunClassWidth'' the following is calculated:

HansR: /* Windrun configuration */

2022-04-02T10:49:44Z

Windrun configuration

← Older revision		Revision as of 10:49, 2 April 2022
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	With the ''WindrunClassWidth'' the following is calculated:		With the ''WindrunClassWidth'' the following is calculated:
	#The maximum windrun which ever occurred on the station is determined (call it ''MaxWindRun'')		#The maximum windrun which ever occurred on the station is determined (call it ''MaxWindRun'')
	#The number of windrun classes is calculated as: <math>\left (\frac{MaxWindRun}{WindrunClassWidth}\ + 1 \right)</math>		#The <math>number of windrun classes</math> is calculated as: <math>\left (\frac{MaxWindRun}{WindrunClassWidth}\ + 1 \right)</math>
	#Then all classes are defined as <math>class[ i ] = WindrunClassWidth + i \times WindrunClassWidth</math>		#Then all classes are defined as (Loop over the number of windrun classes as calculated above) <math>class[ i ] = WindrunClassWidth + i \times WindrunClassWidth</math>

	~~Then the these~~ classes are used for the Windrun chart.		These classes are used for the Windrun chart.

	=== YADR Report class configuration ===		=== YADR Report class configuration ===

HansR: /* Wind Rose */

2022-04-02T10:47:11Z

Wind Rose

← Older revision		Revision as of 10:47, 2 April 2022
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	The chart is configured with the following parameters (explained in [[Charts#WindRoseNrOfWindforceClasses_.26_WindRoseMaxWindSpeed\|the chapter Charts]]):		The chart is configured with the following parameters (explained in [[Charts#WindRoseNrOfWindforceClasses_.26_WindRoseMaxWindSpeed\|the chapter Charts]]):

			[Graphs]
	WindRoseNrOfWindforceClasses=6 (default = 6)		WindRoseNrOfWindforceClasses=6 (default = 6)
	WindRoseMaxWindSpeed=60 (default = 60)		WindRoseMaxWindSpeed=60 (default = 60)

HansR at 10:46, 2 April 2022

2022-04-02T10:46:17Z

← Older revision		Revision as of 10:46, 2 April 2022
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			{\|align=right
			\|__TOC__
			\|}
	== Introduction ==		== Introduction ==
	The Wind charts submodule consists of two charts:		The Wind charts submodule consists of two charts:

HansR: /* Configuration of the Wind charts and YADR report */

2022-04-02T10:45:47Z

Configuration of the Wind charts and YADR report

← Older revision		Revision as of 10:45, 2 April 2022
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	[[Category:CumulusUtils]]		[[Category:CumulusUtils]]
			The configuration of the charts and YADR report is actually straight forward but the user needs to be aware of this configuration especially when having configured CumulusMX to use imperial units and/or the station is residing in a region with dominantly very high or very low winds.

			=== Windrose configuration ===
			#As stated above the number of Windrose sections is taken from the CumulusMX inifile parameter ''NumWindRosePoints'' and you need to adjust the compass direction texts as indicated above
			#Then the user has to to reflect that the Windrose is not very good in displaying very small percentages. As a hurricane will be very rare you should define your windspeed above which you group all windspeeds in only one class. So be aware that maybe a hurricane wind is interesting but the Windrose won't be able to show it if it occurs only once in ten years for two hours. So if your normal windspeeds go up to 50 km/hr (or let's say 30 mi/hr) you set ''WindRoseMaxWindSpeed=50 (or 30 when mi/hr)'' in the unit you use. This number is not converted in any way and is simply a limit for the data as it is in your logs.
			#Then the user needs to define how many classes need to be in the Windrose. As above, too small classes won't sufficiently show some windspeeds, too large slasses won't hold enough information. Experiment with ''WindRoseNrOfWindforceClasses'' to get it right.

			The defaults for the parameters for the Windrose are good for ''km/hr'' but anybody using deviating units should reflect on these parameter values.

			=== Windrun configuration ===
			The Windrun is a bit more automated but still the user has to define the class width through the parameter ''WindrunClassWidth'' (which has a default of 75). Again the default is OK for a ''distance unit of km'', reconsider if using imperial. '''Note that if you use a speed unit of m/s, the distance is in km'''.

			With the ''WindrunClassWidth'' the following is calculated:
			#The maximum windrun which ever occurred on the station is determined (call it ''MaxWindRun'')
			#The number of windrun classes is calculated as: <math>\left (\frac{MaxWindRun}{WindrunClassWidth}\ + 1 \right)</math>
			#Then all classes are defined as <math>class[ i ] = WindrunClassWidth + i \times WindrunClassWidth</math>

			Then the these classes are used for the Windrun chart.

			=== YADR Report class configuration ===
			A similar procedure is used for the legend under the YADR Windrun report with the difference that here always 13 classes are used. Reason is that the extreme classes are easier to see in this colour accented text report than it is in the percental Windrun chart.

HansR: /* Wind Run */

2022-04-02T09:50:38Z

Wind Run

← Older revision		Revision as of 09:50, 2 April 2022
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	[Graphs]		[Graphs]
	WindrunClassWidth=75		WindrunClassWidth=75


	The chart can be shown for ''All Time'' or for a specific year, selectable by the user.		The chart can be shown for ''All Time'' or for a specific year, selectable by the user.

			== Configuration of the Wind charts and YADR report ==

	[[Category:CumulusUtils]]		[[Category:CumulusUtils]]

HansR: /* Wind Run */

2022-04-02T09:49:25Z

Wind Run

← Older revision		Revision as of 09:49, 2 April 2022
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	== Wind Run ==		== Wind Run ==
	[[File:WindRun.jpg\|thumb\|right\|Wind Run]]		[[File:WindRun.jpg\|thumb\|right\|Wind Run]]
	Total wind run per day is shown as a stacked column per month. For every day in a month the wind run is taken and counted into the class it belongs to. The wind run class width parameter value (''WindrunClassWidth'') is given by the user who estimates a width such that the number of classes is reasonable depending on unit and actual local wind conditions.		Total wind run per day is shown as a stacked column per month. For every day in a month the wind run is taken and counted into the class it belongs to.

			The wind run class width parameter value ''WindrunClassWidth'' is given by the user who estimates a width such that the number of classes is reasonable depending on unit and actual local wind conditions:
			[Graphs]
			WindrunClassWidth=75


	The chart can be shown for ''All Time'' or for a specific year, selectable by the user.		The chart can be shown for ''All Time'' or for a specific year, selectable by the user.

HansR: /* Introduction */

2022-04-01T20:05:11Z

Introduction

← Older revision		Revision as of 20:05, 1 April 2022
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	#Wind Rose - Plotting the wind direction and speed in a polar chart;		#Wind Rose - Plotting the wind direction and speed in a polar chart;
	#Monthly ~~Rain~~ - Plotting the ~~wind speed~~ in a stacked column chart;		#Monthly Windrun - Plotting the windrun in a stacked column chart;

	Below you will find an example image of each chart and an explanation of the origin of the numbers.		Below you will find an example image of each chart and an explanation of the origin of the numbers.

HansR at 15:31, 8 August 2021

2021-08-08T15:31:17Z

@@ Line 26: / Line 26: @@
 NOTE: because of this calculation this graph takes a high toll on the performance of CumulusUtils: first because reading the monthly logs is expensive - especially when sampling on minute or five minute frequency - and secondly because the list is long (millions of records when using minute sampling) and making the sub selections per month again takes its toll. Optimisation of this chart is continuous work in progress. Performance of CumulusUtils is highly dependent on the hardware it is running on.
 == Wind Run ==
 [[File:WindRun.jpg|thumb|right|Wind Run]]
-Total windrun per day is shown as a stacked column per month. For every day in a month the windrun is taken and counted into the class it belongs to. The windrun class width parameter value (''WindrunClassWidth'') is given by the user who estimates a width such that the number of classes is reasonable depending on unit and actual local wind conditions.
+Total wind run per day is shown as a stacked column per month. For every day in a month the wind run is taken and counted into the class it belongs to. The wind run class width parameter value (''WindrunClassWidth'') is given by the user who estimates a width such that the number of classes is reasonable depending on unit and actual local wind conditions.
 The chart can be shown for ''All Time'' or for a specific year, selectable by the user.

HansR: /* Calculation of the Wind Rose */

2021-04-09T08:04:30Z

Calculation of the Wind Rose

← Older revision		Revision as of 08:04, 9 April 2021
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	Every record in the database is taken as a sample and counted for the speed and direction classes and as such presented in the chart. Especially for the high frequency sampling (one or five minutes) this will give an accurate picture of the wind speed and direction figures. For the lower frequency sampling this picture may be less accurate for the month level.		Every record in the database is taken as a sample and counted for the speed and direction classes and as such presented in the chart. Especially for the high frequency sampling (one or five minutes) this will give an accurate picture of the wind speed and direction figures. For the lower frequency sampling this picture may be less accurate for the month level.

	NOTE: because of this calculation this graph takes a high toll on the performance of CumulusUtils: first because reading the monthly logs is expensive - especially when sampling on minute or five minute frequency - and secondly because the list is long (millions of records when using minute sampling) and making the sub selections per month again takes its toll. Optimisation of this chart is continuous work in progress.		NOTE: because of this calculation this graph takes a high toll on the performance of CumulusUtils: first because reading the monthly logs is expensive - especially when sampling on minute or five minute frequency - and secondly because the list is long (millions of records when using minute sampling) and making the sub selections per month again takes its toll. Optimisation of this chart is continuous work in progress. Performance of CumulusUtils is highly dependent on the hardware it is running on.

	== Wind Run ==		== Wind Run ==