This is one of the sentences commonly supported by GPS / GNSS receivers.
The GNS sentence includes time, position and fix related data for a GPS / GNSS receiver.
The GNS sentence is essentially a tweaked version of GGA, reporting the correct number of SVs (satellites) in use.
The mode indicator also describes the active GNSS constellations.
10
1 2 3 4 5 6 7 8 9 | 11 12 13 14
| | | | | | | | | | | | | |
$--GNS,hhmmss.ss,ddmm.mm,a,ddmm.mm,a,c--c,xx,x.x,x.x,x.x,x.x,xxxx,s*hh<CR><LF>
| # | Field | Format | Example | Description |
|---|---|---|---|---|
| 0 | Sentence ID | string | $GPGGA | Talker ID (GP) + message ID (GGA) |
| 1 | Time | hhmmss.sss | 092751.000 | UTC time, typically 2 or 3 dp. Leading zeros are always included |
| 2 | Latitude | ddmm.mmmm | 5321.6802 | Latitude, typically 4 or 5 dp. Leading zeros are always included |
| 3 | NS | character | N | Hemispherical orientation N or S (north or south) |
| 4 | Longitude | dddmm.mmmm | 00630.3371 | Longitude, typically 4 or 5 dp. Leading zeros are always included |
| 5 | EW | character | W | Hemispherical orientation E or W (east or west) |
| 6 | Mode ind | characters | AAAANN | Mode indicator |
| 7 | Num SV | numeric | 32 | Number of space vehicles (satellites) in use (00-99) |
| 8 | HDOP | numeric | 3.2 | Horizontal dilution of precision (HDOP), typically 1 or 2 dp |
| 9 | Elevation | numeric | 3.04 | Antenna altitude above/below mean-sea-level, typically 1 or 2 dp |
| 10 | Separation | numeric | 48.8 | Geoidal separation in meters, difference between ellipsoid and mean-sea-level |
| 11 | DGPS age | numeric | - | Age of differential corrections in seconds (null when DGPS is not used) |
| 12 | DGPS station | numeric | 0000 | Differential reference station ID; 0000-1023. Null (empty) or 0000 when DGPS not used |
| 13 | Nav Status | character | V | Navigational status indicator (NMEA 4.10 and later) |
| 14 | Checksum | hexadecimal | *7B | Checksum |
Notes:
$GPGNS,112257.00,3844.24011,N,00908.43828,W,AN,03,10.5,,*57