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• Wind Rose and Graphics: What is the different between blowing from and blowing to in the wind rose?
  Answer: Blowing From and Blowing To are two different conventions for describing wind direction. Blowing From indicates the direction that the wind is coming from (e.g. a ...
• Wind Rose and Graphics: How is the wind rose resultant vector calculated?
  Answer: The resultant vector combines the frequency of winds in each direction to get an "average" wind direction.  There are two things to note about this ...
• Wind Rose and Graphics: Why do two files (in different formats) with the same data show different wind roses?
  Answer: In some meteorological files, wind directions are reported to the nearest 10 degrees. To avoid a bias in the wind rose plots toward the cardinal ...
• Met File Format: What is wrong with my met file format?
  Answer: If you have more missing hours than expected, strange results, or if your get an Unknown File Format message, there may be an issue with ...
• General: How can I change the calm wind definition?
  Answer: By default, calm winds are defined as less than 1 knot, or less than 1 m/s depending on the units you are using.  It is ...
• Licensing: My activation code didn't work, what do I do?
  Answer: You should have received your activation code via email, part of the email will look similar to this: "Your product Registration Key is [DF1B67EC513D664B]." The activation code ...
• Licensing: My license expired, how can I get a new one?
  Answer: Licenses for Lakes Freeware are valid for one year.  When your license has expired you can simply re-register on our website to receive a new ...
• Licensing: Where is my activation code?
  Answer: If you registered for one of the Lakes freeware packages but did not receive an email with your activation code, there are several possibilities: You specified ...
• Sources: What are the area source dimensions?
  Answer: The dimensions of an area source in Screen View are defined in terms of the Larger side and the Smaller side.  A specific orientation of ...
• Receptors: How can I determine concentrations above ground level?
  Answer: Screen View has a Flagpole Receptor option; specifying a non-zero elevation for the flagpole height will make Screen calculate concentrations at that height.   ...

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