GPS Timestamp (0x80,0x12)

Description

GPS timestamp of the SENSOR data

Notes

Should the PPS become unavailable, the device will revert to its internal clock, which will cause the reported time to drift from true GPS time. Upon recovering from a PPS outage, the user should expect a jump in the reported GPS time due to the accumulation of internal clock error. If synchronization to an external clock or onboard GNSS receiver (for products that have one) is disabled, this time is equivalent to internal system time.

Note: this data field may be deprecated in the future. The more flexible shared data field (0x80, 0xD3) should be used instead.

Parameter Name

Data Type

Description

Field Length

Descriptor

0x12

Tow

double

GPS Time of Week [seconds]

Week Number

u16

GPS Week Number since 1980 [weeks]

Valid Flags

u16 bitfield

Name	Bit(s)	Description
pps_valid	0	True when the PPS signal is present.
time_refresh	1	Toggles each time the time is updated via internal GPS or the GPS Time Update command (0x01, 0x72).
time_initialized	2	True if the time has ever been set.
tow_valid	3	True if the time of week is valid.
week_number_valid	4	True if the week number is valid.