## USVI Longford Raw Data: Preset Calculations

December 13, 2012 to December 20, 2013

Calculation name | Equation | Condition to compute | Value during failed condition |
---|---|---|---|

Wind Direction Delta (58-32m) | abs({Avg Wind Direction @ 58m [deg]}-{Avg Wind Direction @ 32m [deg]}) | 1 | 0 |

Preset calculations are performed on the fly, as requested by user.

Calculation is only performed when

*condition*equation is true, otherwise the

*failed condition*value is output

Plots using a

*Langley*calculation will be plotted versus airmass (instead of time) and will also include a linear fit with slope & intercept.

*Wind Direction Deltas*are special cases that go beyond the equations listed above to keep the data in the 0 to 180 degree realm.