Recent content by selane

  1. S

    Deriving the standard deviation of a resultant vector

    Unfortunately I only have the standard deviations of x and y over each 30 minute time period. I don't have any velocity data for x or y. I do have the mean of h over the 30 minutes, but don't have the standard deviation of h or any of the raw wind speed data (which would have a sampling...
  2. S

    Deriving the standard deviation of a resultant vector

    Sorry - forgot to exit my little meteorology bubble before posting... My data is averaged into 30 minute blocks, so the streamwise direction is the average direction of the wind over those 30 minutes. The cross-streamwise component is orthogonal to the streamwise component, and both are...
  3. S

    Deriving the standard deviation of a resultant vector

    I am working with some wind speed data and need to work out the standard deviation of the magnitude of the horizontal wind. Unfortunately the only information I have is the standard deviation for the streamwise and cross-stream components of the wind (which are orthogonal). Is it possible to...
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