Advanced wind Plugin for SignalK

This SignalK plugin calculates true wind and, optionally, also ground wind, back-calculated apparent wind and leeway. Optionally the plugin also corrects for:

• Sensor misalignment
• Mast rotation
• Vessel heel
• Mast movements
• Upwash
• Leeway
• Sensor heigth

The plugin comes with an app that allows you to inspect the effect of the corrections in real time.

SignalK paths needed:

• environment.wind.speedApparent
• environment.wind.angleApparent
• mast rotation path as specified in the options, only for mast rotation
• navigation.attitude, only for correction for vessel heel and pitch and correction for mast movement
• navigation.speedThroughWater, only when not using speed over ground for boat speed
• navigation.speedoverground, only when using speed over ground for boat speed or when outputting ground speed
• navigation/courseOverGroundTrue, only when outputting ground speed

The plugin uses appoximations when applying corrections. The following approximations are used:

Leeway angle (°) = α ⋅ Vboat / Vwind + β ⋅ sin(Heel Angle) Upwash Angle (°) = α ⋅ AWA(°) + β(°) Wind gradient = (10 / sensor height above water)^

For each of this formulas α and β are parameters that can be specified in the plugin config.