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UBX Class TIM
This class transmits the information of time pulse and time mark.
TIM – TM (0x0D 0x02)
It periodically polls the time mark data.
Header ID Data Length Data Checksum
0xB5 0x62 0x0D 0x02 28 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U4 Counter difference since last
polled time
4 U4 Time difference since last polled
time (ms)
8 U4 Sub-millisecond part of “time
difference” (ms/2^32)
12 U4 Quantization (ms/2^32)
16 U4 GPS time of week (ms) Time pulse
20 U4 Sub-millisecond part of “GPS
time of week” (ms/2^32)
24 U2 GPS week number Time pulse
26 U1 Flags Bit 0 – 0: GPS time base; 1: UTC
time base
Bit 1 – 0: UTC not available; 1:
UTC available
Bit 2 – 0: time not available; 1:
time available
27 U1 Reserved