u-blox ZED-F9P Interface Description - Manual
Advance Information
5.14.15 UBX-NAV-SIG (0x01 0x43)
5.14.15.1 Signal Information
Message
UBX-NAV-SIG
Description
Signal Information
Firmware
Supported on:
•
u-blox 9 with protocol version 27
Type
Periodic/Polled
Comment
This message displays information about signals currently tracked by the receiver.
On the F9 platform the maximum number of signals is 120.
Header
Class
ID
Length (Bytes)
Payload
Checksum
Message Structure
0xB5 0x62
0x01 0x43 8 + 16*numSigs
see below
CK_A CK_B
Payload Contents:
Byte Offset
Number
Format
Scaling
Name
Unit
Description
0
U4
-
iTOW
ms
.
See the
for details.
4
U1
-
version
-
Message version (0x00 for this version)
5
U1
-
numSigs
-
Number of signals
6
U1[2]
-
reserved1
-
Start of repeated block (numSigs times)
8 + 16*N
U1
-
gnssId
-
for
assignment
9 + 16*N
U1
-
svId
-
for
assignment
10 + 16*N
U1
-
sigId
-
New style signal identifier (see
11 + 16*N
U1
-
freqId
-
Only used for GLONASS: This is the frequency
slot + 7 (range from 0 to 13)
12 + 16*N
I2
0.1
prRes
m
Pseudorange residual
14 + 16*N
U1
-
cno
dBHz
Carrier-to-noise density ratio (signal strength)
15 + 16*N
U1
-
qualityInd
-
Signal quality indicator:
0: no signal
1: searching signal
2: signal acquired
3: signal detected but unusable
4: code locked and time synchronized
5, 6, 7: code and carrier locked and time
synchronized
Note: Since IMES signals are not time
synchronized, a channel tracking an IMES signal
can never reach a quality indicator value of
higher than 3.
UBX-18010854 - R04
Advance Information
Page 157 of 259