32 | Data output
(2)
GRS
- GNSS Range Residual
This message is used to support RAIM.
Notes: 1 ---- UTC time of GGA or GNS fix associated with
this sentence
2 ---- Mode 0 = residuals were used to calculate
the position given in the matching GGA or
GNS.
1 = residuals were computed after the GGA
or GNS position was computed.
3 ---- Range residuals in meters for sat. used
in navigation solution. Order must match
the order of the satellite ID numbers in
GSA. When GRS is used GSA and GSV are
generally required.
(3)
GSA
- GPS DOP and Active Satellites
GPS receiver operating mode, satellites used in the
navigation solution reported by the $GPGGA sentence,
and DOP values.
Notes: 1---- Mode: M = Manual, forced to operate in 2D
or 3D Mode
A = Automatic, allowed to automatically
switch 2D/3D
2 ---- Mode: 1 = Fix not available, 2 = 2D, 3 = 3D
3-14 -PRN numbers of satellites used in solution
(null for unused fields)
15 ---PDOP
16 ---HDOP
17 ---VDOP
$GPGRS,hhmmss,x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x,x.x*hh<CR><LF>
1
2
3
$GPGSA,a,x,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,xx,x.x,x.x,x.x*hh<CR><LF>
13 14 15
1 2 3 4 5 6 7 8 9 10 11 12
16 17
