Dtm : Référence Du Datum; Gbs : Détection D'erreurs De Satellites Gnss - Spectra Precision GNSS SP90m Guide Utilisateur

DTM : Référence du datum
$GPDTM,s1,,f2,c3,f4,c5,f6,s7*cc
Parameter
Local datum code:
• W84: WGS84 used as local datum
s1 • 999: Local datum computed using the
parameters provided by the RTCM3.1
data stream.
f2 Latitude offset, in meters
c3 Direction of latitude
f4 Longitude offset, in meters
c5 Direction of longitude
f6 Altitude offset, in meters
s7 Reference datum code
*cc Checksum
GBS : Détection d'erreurs de satellites GNSS
$--GBS,m1,f2,f3,f4,d5,f6,f7,f8,h9,h10*cc
Parameter
UTC time of the GGA or GNS fix asso-
m1
ciated with this message (hhmmss.ss)
Expected error in latitude, in meters,
f2
due to bias, with noise= 0
Expected error in longitude, in meters,
f3
due to bias, with noise= 0
Expected error in altitude, in meters,
f4
due to bias, with noise= 0
d5 ID number of most likely failed satellite
Probability of missed detection for
f6
most likely failed satellite
Estimate of bias, in meters, on most
f7
likely failed satellite
f8 Standard deviation of bias estimate
h9 GNSS system ID
h10 GNSS signal ID
*cc Checksum
Description
Description
Range
W84, 999
0-59.999999
N, S
0-59.999999
E, W
±0-99.999
W84
*00-*FF
Range
000000.00-235959.99
0.0-99.9
0.0-99.9
0.0-99.9
1-32 for GPS
33-64 for SBAS
65-96 for GLONASS
97-128 for Galileo
129-160 for BeiDou
193-202 for QZSS
0.00-1.00
0.0-99.9
0.0-99.9
0-F
0-F
*00-*FF
135