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CFG – SBAS (0x06 0x16)
It’s a command message. It’s used to configure SBAS systems, such as WAAS,
EGNOS, and MSAS. More information about SBAS services is referred to document
RTCA/DO-229C (www.rtca.org).
Header ID Data Length Data Checksum
0xB5 0x62 0x06 0x16 8 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U1 SBAS mode. Bit mask
Bit 0 – 1: SBAS enabled; 0:
SBAS disabled
Bit 1 – SBAS testbed; 1: use data
anyhow; 0: ignore data when in
test mode (SBAS Msg 0)
Bits 2-7 – reserved
1 U1 SBAS usage Bit mask
Bit 0 – use ranges for navigation
solution
Bit 1 – use differential correction
Bit 2 – use integrity information
2 U1 Maximum number of channels
for searching SBAS satellites
0 ~ 3
3 U1 Reserved
4 U4 SBAS PRN numbers in
searching channels
All bits are set to 0 – auto-scan
(searching all available PRNs)
Bit 0 – PRN 120
Bit 1 – PRN 121
….
Bit 18 – PRN 138
Bits 19-31 – reserved (set to 0)