Grs: Gnss Range Residuals; Gsa: Dop Gnss Et Satellites Actifs - Spectra Precision GNSS SP90m Guide Utilisateur

GRS: GNSS Range Residuals

$--GRS,m1,d2,n(f3)*cc
Parameter
$GPGRS: Only GPS satellites are used.
$GLGRS: Only GLONASS satellites are used.
$GNGRS: Several constellations (GPS, SBAS,
"$--GRS"
GLONASS) are used.
Header
$GBGRS: Only BeiDou satellites are used.
$GNGRS: Several constellations are used (GPS,
SBAS, GLONASS, QZSS, BeiDou)
m1 Current UTC time of GGA position (hhmmss.ss)
d2 Mode used to compute range residuals
Range residual for satellite used in position computa-
tion (repeated "n" times, where n is the number of sat-
ellites used in position computation). Residuals are
f3
listed in the same order as the satellites in the GSA
message so that each residual provided can easily be
associated with the right satellite.
*cc Checksum

GSA: DOP GNSS et satellites actifs

$--GSA,c1,d2,d3,d4,d5,d6,d7,d8,d9,d10,d11,d12,d13,d14,f15,f16,f17*cc
Parameter
$GPGSA: Only GPS satellites are used.
$GLGSA: Only GLONASS sats are used.
"$--GSA"
$GBGSA: Only BEIDOU sats are used
Header
$GNGSA: Several constellations (GPS,
SBAS, GLONASS, BEIDOU) are used.
Output mode:
c1 • M: Manual
• A: Automatic
Position indicator:
• 1: No position available
d2
• 2: 2D position
• 3: 3D position
Satellites used in the position solution
d3-d14
(blank fields for unused channels)
f15 PDOP
f16 HDOP
f17 VDOP
*cc Checksum
Description
Description
Range
$GPGRS
$GLGRS
$GBGRS
$GNGRS
000000.00-
235959.99
Always "1"
±999.999
*00-*FF
Range
$GPGSA, $GLGSA,
$GBGSA, $GNGSA
M, A
1-3
GPS: 1-32
GLONASS: 65-96
SBAS: 1-44
GALILEO: 1-30
QZSS: 1-5
BEIDOU: 1-35
IRNSS: 1-7
0-9.9
0-9.9
0-9.9
*00-*FF
141