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package nmea
const (
// TypeVPW type of VPW sentence for Speed Measured Parallel to Wind
TypeVPW = "VPW"
)
// VPW - Speed Measured Parallel to Wind
// https://gpsd.gitlab.io/gpsd/NMEA.html#_vpw_speed_measured_parallel_to_wind
//
// Format: $--VPW,x.x,N,x.x,M*hh<CR><LF>
// Example: $IIVPW,4.5,N,6.7,M*52
type VPW struct {
BaseSentence
SpeedKnots float64 // Speed, "-" means downwind, knots
SpeedKnotsUnit string // N = knots
SpeedMPS float64 // Speed, "-" means downwind, m/s
SpeedMPSUnit string // M = m/s
}
// newVPW constructor
func newVPW(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeVPW)
return VPW{
BaseSentence: s,
SpeedKnots: p.Float64(0, "wind speed in knots"),
SpeedKnotsUnit: p.EnumString(1, "wind speed in knots unit", SpeedKnots),
SpeedMPS: p.Float64(2, "wind speed in meters per second"),
SpeedMPSUnit: p.EnumString(3, "wind speed in meters per second unit", SpeedMeterPerSecond),
}, p.Err()
}
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