Wind ( GS ; TT ; TAS ; TH )

Wind calculation

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Christoph Ivo Mattle - Show more from this author
Christophs
http://www.christophmattle.ch

Sample input:

Wind ( 50 ; 300 ; 180 ; 125 )

Sample output:

230|304

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

SetzeVars (
 [ arctt = ( 90 - TT ) * Pi / 180 ;
   arcth = ( 90 - TH ) * Pi / 180 ;
   sntt = Sin ( arctt ) ;
   cstt = Cos ( arctt ) ;
   snth = Sin ( arcth ) ;
   csth = Cos ( arcth ) ;
   xw = GS * cstt - TAS * csth  ;
   yw = GS * sntt - TAS * snth ;
   atnw = Wenn ( xw = 0 ; Wenn ( yw<0 ; - Pi / 2 ; Pi / 2 ) ; Arctan ( yw / xw ) )
 ] ;
 Runden ( Wurzel ( xw^2 + yw^2 ) ; 0 ) & 
 "|" & 
 Runden ( Mod ( 90 - atnw * 180 / Pi + Wenn ( xw ≤ 0 ; 180 ; 0 ) ; 360 ) ; 0 ) 
)

Wind ( GS ; TT ; TAS ; TH ) ;
GS : Ground Speed
TT : True Track
TAS : True Air Speed
TH : True Heading.
The aircraft flies with heading TH and airspeed TAS.
It moves on the track TT with the groundspeed GS.
The resulting wind is "strength|direction".

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

Wind ( GS ; TT ; TAS ; TH )

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