Total Least Squares MCP Algorithm

This algorithm uses the total least squares process to correlate target and reference data.

If you choose multiple direction sectors, Windographer will subdivide the concurrent data by direction sector and calculate the slope and offset separately for each sector. It uses the reference direction sensor to determine the sector.

Similarly, if you choose multiple yearly divisions, Windographer will also subdivide the concurrent data according to month. If you choose 4 yearly divisions, for example, then January-March data will go in the first subdivision, April-June in the second, July-September in the third, and October-December in the fourth.

Cutoff Wind Speed

The effect of the wind speed cutoff depends on whether you have subdivided by direction sector. If you have subdivided by direction sector and you specify a cutoff wind speed, then time steps in which the reference speed is at or above the cutoff get assigned to the appropriate direction sector, whereas others get assigned to an omnidirectional 'below cutoff' subdivision. That process happens both when calculating the slopes and offsets from the concurrent data, and when applying the slopes and offsets to synthesize target data.

If you specify a cutoff wind speed without subdividing by direction sector, then the calculation of slopes and offsets from the concurrent data will consider only those time steps in which the reference speed is ar or above the cutoff speed. But in this case, the cutoff speed has no effect when applying those slopes and offsets to synthesize target data.