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package nmea
const (
// TypeVWT type of VWT sentence for True Wind Speed and Angle
TypeVWT = "VWT"
)
// VWT - True Wind Speed and Angle
// https://www.nmea.org/Assets/100108_nmea_0183_sentences_not_recommended_for_new_designs.pdf
// https://www.rubydoc.info/gems/nmea_plus/1.0.20/NMEAPlus/Message/NMEA/VWT
// https://lists.gnu.org/archive/html/gpsd-dev/2012-04/msg00048.html
//
// Format: $--VWT,x.x,a,x.x,N,x.x,M,x.x,K*hh<CR><LF>
// Example: $IIVWT,75,x,1.0,N,0.51,M,1.85,K*40
type VWT struct {
BaseSentence
TrueAngle float64 // true Wind direction magnitude in degrees (0 to 180 deg)
TrueDirectionBow string // true Wind direction Left/Right of bow
SpeedKnots float64 // true wind Speed, knots
SpeedKnotsUnit string // N = knots
SpeedMPS float64 // Wind speed, meters/second
SpeedMPSUnit string // M = m/s
SpeedKPH float64 // Wind speed, km/hour
SpeedKPHUnit string // M = km/h
}
// newVWT constructor
func newVWT(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeVWT)
return VWT{
BaseSentence: s,
TrueAngle: p.Float64(0, "true wind angle"),
TrueDirectionBow: p.EnumString(1, "true wind direction to bow", Left, Right),
SpeedKnots: p.Float64(2, "wind speed in knots"),
SpeedKnotsUnit: p.EnumString(3, "wind speed in knots unit", SpeedKnots),
SpeedMPS: p.Float64(4, "wind speed in meters per second"),
SpeedMPSUnit: p.EnumString(5, "wind speed in meters per second unit", SpeedMeterPerSecond),
SpeedKPH: p.Float64(6, "wind speed in kilometers per hour"),
SpeedKPHUnit: p.EnumString(7, "wind speed in kilometers per hour unit", SpeedKilometerPerHour),
}, p.Err()
}
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