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NAV – SBAS (0x01 0x32)
It periodically polls the status of SBAS.
Header ID Data Length Data Checksum
0xB5 0x62 0x01 0x32 12+N*12 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U4 GPS time of week (ms)
4 U1 PRN number for SBAS, e.g.
WAAS, EGNOS.
5 U1 SBAS mode 0 – disabled
1 – enabled integrity
2 – enabled test mode
6 I1 SBAS type -1 – unknown
0 – WAAS
1 – EGNOS
2 – MSAS
16 – GPS
7 U1 SBAS services Bit 0 – ranging
Bit 1 – corrections
Bit 2 – integrity
Bit 3 – test mode
8 U1 Number of SV data following
9 U1[3] Reserved
The following data will be repeated N times (number of SVs).
12+N*12 U1 PRN number (SV ID)
13+N*12 U1 Flags
14+N*12 U1 Monitoring status
15+N*12 U1 SBAS type -1 – unknown
0 – WAAS
1 – EGNOS
2 – MSAS
16 – GPS
16+N*12 U1 SBAS services Bit 0 – ranging
Bit 1 – corrections
Bit 2 – integrity
Bit 3 – test mode