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package nmea
const (
// TypeGGA type for GGA sentences
TypeGGA = "GGA"
// Invalid fix quality.
Invalid = "0"
// GPS fix quality
GPS = "1"
// DGPS fix quality
DGPS = "2"
// PPS fix
PPS = "3"
// RTK real time kinematic fix
RTK = "4"
// FRTK float RTK fix
FRTK = "5"
// EST estimated fix.
EST = "6"
)
// GGA is the Time, position, and fix related data of the receiver.
// http://aprs.gids.nl/nmea/#gga
// https://gpsd.gitlab.io/gpsd/NMEA.html#_gga_global_positioning_system_fix_data
//
// Format: $--GGA,hhmmss.ss,ddmm.mm,a,ddmm.mm,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>
// Example: $GNGGA,203415.000,6325.6138,N,01021.4290,E,1,8,2.42,72.5,M,41.5,M,,*7C
type GGA struct {
BaseSentence
Time Time // Time of fix.
Latitude float64 // Latitude.
Longitude float64 // Longitude.
FixQuality string // Quality of fix.
NumSatellites int64 // Number of satellites in use.
HDOP float64 // Horizontal dilution of precision.
Altitude float64 // Altitude.
Separation float64 // Geoidal separation
DGPSAge string // Age of differential GPD data.
DGPSId string // DGPS reference station ID.
}
// newGGA constructor
func newGGA(s BaseSentence) (Sentence, error) {
p := NewParser(s)
p.AssertType(TypeGGA)
return GGA{
BaseSentence: s,
Time: p.Time(0, "time"),
Latitude: p.LatLong(1, 2, "latitude"),
Longitude: p.LatLong(3, 4, "longitude"),
FixQuality: p.EnumString(5, "fix quality", Invalid, GPS, DGPS, PPS, RTK, FRTK, EST),
NumSatellites: p.Int64(6, "number of satellites"),
HDOP: p.Float64(7, "hdop"),
Altitude: p.Float64(8, "altitude"),
Separation: p.Float64(10, "separation"),
DGPSAge: p.String(12, "dgps age"),
DGPSId: p.String(13, "dgps id"),
}, p.Err()
}
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