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NAV – TIMEGPS (0x01 0x20)
It periodically polls the information about GPS time.
Header ID Data Length Data Checksum
0xB5 0x62 0x01 0x20 16 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U4 GPS time of week (ms)
4 I4 Remainder of rounded GPS time
of week relative to GPS
millisecond time of week (ns)
-500000 ~ 500000
8 I2 GPS week
10 I1 Leap seconds (s) GPS – UTC
11 U1 Flags 0x01 – valid time of week
0x02 – valid week number
0x04 – valid UTC
12 U4 Time accuracy (ns)