u-blox ZED-F9P Interface Description - Manual
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Appendix
A Satellite Numbering
A summary of all the SV numbering schemes is provided in the following table.
Satellite numbering
GNSS Type
SV range
UBX gnssId:svId
UBX svId
NMEA 2.X-4.
0 (strict)
NMEA 2.X-4.0
(extended)
NMEA 4.1+
(strict)
NMEA 4.1+
(extended)
GPS
G1-G32
0:1-32
1-32
1-32
1-32
1-32
1-32
SBAS
S120-S158 1:120-158
120-158
33-64
33-64,152-158 33-64
33-64,152-158
Galileo
E1-E36
2:1-36
211-246
-
301-336
1-36
1-36
BeiDou
B1-B37
3:1-37
159-163,33-64 -
401-437
1-37
1-37
QZSS
Q1-Q5
5:1-5
193-197
-
193-197
-
193-197
GLONASS R1-R32, R? 6:1-32, 6:255 65-96, 255
65-96, null 65-96, null
65-96, null 65-96, null
B UBX and NMEA Signal Identifiers
UBX and NMEA protocols uses signal identifiers (commonly abbreviated to "sigId") to distinguish between
different signals from GNSS.
Signal identifiers are only valid when combined with a GNSS identifier (see
range of identifiers currently supported in the firmware.
The following table shows the mapping of GNSS signals to UBX / NMEA signal identifier.
Signal Identifiers
Signal name
UBX gnssId
UBX sigId
NMEA 4.1+ gnssId
NMEA 4.1+ sigId
GPS L1C/A*
0
0
1
1
GPS L2 CL
0
3
1
6
GPS L2 CM
0
4
1
5
Galileo E1 C*
2
0
3
7
Galileo E1 B*
2
1
3
7
Galileo E5 bI
2
5
3
2
Galileo E5 bQ
2
6
3
2
BeiDou B1I D1*
3
0
4**
1**
BeiDou B1I D2*
3
1
4**
1**
BeiDou B2I D1
3
2
4**
3**
BeiDou B2I D2
3
3
4**
3**
QZSS L1C/A*
5
0
GLONASS L1 OF*
6
0
2
1
GLONASS L2 OF
6
2
2
3
UBX messages, that don't have an explicit sigId field, contain information about the subset of signals marked
with (*).
BeiDou gnssId and sigId are not defined in the NMEA protocol version 4.1, values shown in the table are valid
for u-blox products only (**).
UBX-18010854 - R04
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