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package nmea
const (
// TypeTTM type of TTM sentence for Tracked Target Message
TypeTTM = "TTM"
)
// TTM - Tracked Target Message
// https://gpsd.gitlab.io/gpsd/NMEA.html#_ttm_tracked_target_message
// https://github.com/nohal/OpenCPN/wiki/ARPA-targets-tracking-implementation#ttm---tracked-target-message
//
// Format: $--TTM,xx,x.x,x.x,a,x.x,x.x,a,x.x,x.x,a,c--c,a,a*hh<CR><LF>
// Format: $--TTM,xx,x.x,x.x,a,x.x,x.x,a,x.x,x.x,a,c--c,a,a,hhmmss.ss,a*hh<CR><LF>
// Example: $RATTM,02,1.43,170.5,T,0.16,264.4,T,1.42,36.9,N,,T,,,M*2A
type TTM struct {
BaseSentence
TargetNumber int64 // Target number 00 – 99
TargetDistance float64 // Target Distance
Bearing float64 // Bearing from own ship, degrees
BearingType string // Type of target Bearing, T = True, R = Relative
TargetSpeed float64 // Target Speed
TargetCourse float64 // Target Course
CourseType string // target course type, T = True, R = Relative
DistanceCPA float64 // Distance of closest-point-of-approach
TimeCPA float64 // Time until closest-point-of-approach "-" means increasing
SpeedUnits string // Speed/distance units, K/N/S
TargetName string // Target name
TargetStatus string // Target status (L=lost, Q=acquisition, T=tracking)
ReferenceTarget string // Reference target, R= reference target; null (,,)= otherwise
TimeUTC Time // UTC of data, hh is hours, mm is minutes, ss.ss is seconds.
TypeOfAcquisition string // Type, A = Auto, M = Manual, R = Reported
}
// newTTM constructor
func newTTM(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeTTM)
return TTM{
BaseSentence: s,
TargetNumber: p.Int64(0, "target number"),
TargetDistance: p.Float64(1, "target Distance"),
Bearing: p.Float64(2, "bearing"),
BearingType: p.EnumString(3, "bearing type", "T", "R"),
TargetSpeed: p.Float64(4, "target speed"),
TargetCourse: p.Float64(5, "target course"),
CourseType: p.EnumString(6, "course type", "T", "R"),
DistanceCPA: p.Float64(7, "distance CPA"),
TimeCPA: p.Float64(8, "time of CPA"),
SpeedUnits: p.EnumString(9, "speed units", DistanceUnitKilometre, DistanceUnitNauticalMile, DistanceUnitStatuteMile),
TargetName: p.String(10, "target name"),
TargetStatus: p.EnumString(11, "target status", RadarTargetLost, RadarTargetAcquisition, RadarTargetTracking),
ReferenceTarget: p.EnumString(12, "reference target", "R"),
TimeUTC: p.Time(13, "UTC time"),
TypeOfAcquisition: p.EnumString(14, "type of acquisition", "A", "M", "R"),
}, p.Err()
}
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