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14789Re: Average Wind Direction & Speed

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  • wuhu_software
    Jul 9, 2009
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      I believe the direction is calculated using the vectors.

      There in an option under the tweaks screen to include zero wind speed. This requires the latest version.


      --- In wuhu_software_group@yahoogroups.com, David Lipper <glenvilleweather@...> wrote:
      >
      > Actually, I would like simple averaging for wind speed (I guess it does
      > that now), including calm (0 mph) samples. Which setting controls this?
      >
      > I would like the vector addition for wind direction (i.e. weighted by
      > wind speed of each sample).
      >
      > wuhu_software wrote:
      > >
      > >
      > >
      > > Initially, a long time ago, it was using vectors.
      > >
      > > Eventually, I just averaged with wind speed (no including zero wind
      > > speeds unless you check an option).
      > >
      > > I cannot recally why the vector approach was abandoned. When I find
      > > some time I could make it configurable.
      > >
      > > Would you want to use the vector approach or just simple averaging?
      > >
      > > Thanks.
      > >
      > > --- In wuhu_software_group@yahoogroups.com
      > > <mailto:wuhu_software_group%40yahoogroups.com>, David Lipper
      > > <glenvilleweather@> wrote:
      > > >
      > > > I have a question regarding how Wuhu calculates average wind
      > > direction and
      > > > speed.
      > > > As far as I can tell, each has two ways:
      > > >
      > > > Average direction can be based on vector addition including wind
      > > speed (in
      > > > other words weighted by windspeed) or using unit length (that is
      > > unweighted
      > > > by wind speed).
      > > >
      > > > For average wind speed, it can be a simple time average; or it can be a
      > > > vector based average.
      > > >
      > > > How does Wuhu calculate it? Or is it configurable?
      > > >
      > > > I found this page (http://www.webmet.com/met_monitoring/62.html
      > > <http://www.webmet.com/met_monitoring/62.html>), which
      > > > frankly has more detail than I can get through, but its vector and unit
      > > > vector descriptions are what I mean, in more formal ways.
      > > >
      > >
      > >
      >
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