Scale Onsite Dataset Window

This window lets you scale your original onsite dataset to conform to the extended onsite dataset. To access this window from the Long Term Adjustment window, click Scale Onsite Dataset on the Synthesize Data tab:

This window gives several options for how to scale the onsite dataset, and shows a simple preview of the resulting monthly mean speeds and temperatures. The checkboxes let you choose whether to scale speeds, temperatures, or both. If you decide to scale speeds, the speed scale factors will apply to every speed data column in the onsite dataset, at all heights, including mean, standard deviation, min, and max speeds. Similarly, if you decide to scale temperatures, the temperature scale factors will apply to all temperature columns.

You can choose separately for speed and temperature whether and how to scale the onsite data. You can apply a single overall scale factor to the whole dataset, or twelve scale factors, one for each month of the year. Either way, Windographer will calculate the default scale factor(s) by comparing the extended onsite dataset to the original onsite dataset.

In the screenshot below the user has chosen to scale the speed data by a constant overall factor, equal to the extended onsite mean of monthly means speed divided by the original onsite mean of monthly means speed:

When using a single overall scaling factor, you can also choose to calculate the scale factor from the simple means, or to enter your own value manually.

In the screenshot below the user has chosen to scale the speed data by month, making the monthly means follow the same pattern as the extended onsite dataset:

The same options apply to the scaling of temperature data, but note that Windographer uses absolute units when scaling temperatures. To scale from an original value of 1.15°C to an extended value of -0.14°C, as in the screenshot below, Windographer calculates the scale factor not as -0.14°C / 1.15°C = -0.12174, but rather as (-0.14 + 273.15) K / (1.15 + 273.15) K = 0.99530:

When you click OK to close this window Windographer scales the onsite dataset, lets you specify a new filename, and adds the appropriate notice to its document history: