FP_A-TP
This message is available from 2.102.1
Description:
This message contains information on the timepulse. It is output following the timepulse signal. The time of the timepulse is reported with [ps] precision as a time of week with respect to a time scale. Typically, this is GPS’ UTC (USNO). Note that the [ps] precision does not imply this level of accuracy. The latter is typically around [0.1us] or better.
The message is only output when a timepulse is available, i.e., when the GNSS receiver has a navigation solution.
Configuration:
FP_A-TP_GNSS1 for output of the message for the timepulse for the GNSS1 receiver.
Example message:
$FP,TP,1,GNSS1,UTC,USNO,131937,0.000000000000,18*47
Message fields:
# | Field | Format | Unit | Example | Description |
---|---|---|---|---|---|
1 |
| String | - |
| Message type, always |
2 |
| Numeric | - |
| Message version, always |
3 |
| String | - |
| Timpulse name (source) |
4 |
| String | - |
| Time base (see below), or null if not available |
5 |
| String | - |
| Time reference (see below), or null if not available |
6 |
| Numeric | s |
| Timepulse time seconds of week, integer second part (0–604799), or null |
7 |
| Float (.12) | s |
| Timepulse time seconds of week, sub-second part (0.000000000000–0.999999999999), or null |
7 |
| Numeric | s |
| GPS leapseconds, or null if unknown |
Values for timebase
:
Value | Description |
---|---|
null | No timepulse alignment |
| Timepulse aligned to GNSS |
| Timepulse aligned to UTC |
Values for timeref
if timebase
is GNSS
:
Value | Description |
---|---|
| Timepulse aligned to GPS |
| Timepulse aligned to Galileo |
| Timepulse aligned to BeiDou |
| Timepulse aligned to GLONASS |
| Timepulse aligned to other GNSS |
other values | Reserved for future use |
Values for timeref
if timebase
is UTC
:
Value | Description |
---|---|
| Timepulse aligned to no UTC (no precise UTC parameters known yet) |
| Timepulse aligned to Communications Research Laboratory (CRL), Japan |
| Timepulse aligned to National Institute of Standards and Technology (NIST) |
| Timepulse aligned to U.S. Naval Observatory (USNO) |
| Timepulse aligned to International Bureau of Weights and Measures (BIPM) |
| Timepulse aligned to European laboratories |
| Timepulse aligned to Former Soviet Union (SU) |
| Timepulse aligned to National Time Service Center (NTSC), China |
| Timepulse aligned to other/unknown UTC |
other values | Reserved for future use |