Command and Log Reference
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Message ID number of the log
The length in bytes of the
message body, excluding the
header and the CRC
Reference time of GPS or BDS
GPS or BDS time quality indicator
GPS seconds from the beginning
of the reference
week, accurate to the
millisecond
Leap seconds of GPST relative to
UTC
Table 6-16: ASCII Message Header Structure
Sync character. The ASCII message always starts with
the “$” character
The ASCII name of the log or command of this manual
The minimum percentage of time that the processor
is idle, calculated once per second
Reference time of GPS or BDS
GPS time quality indicator:
UNKNOWN = Time validity
FINE = Time has fine precision
GPS reference week number
GPS seconds from the beginning of the reference
week, accurate to the millisecond
8-bit hexadecimal number indicating the status of the
hardware and software of the receiver
Leap seconds of GPST relative to UTC