FP_A-TP

Available since firmware 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

Example message

$FP,TP,1,GNSS1,UTC,USNO,131937,0.000000000000,18*47

 

Message fields

# Field Format Unit Example Description
1

msg_type

 String

-

TP

Message type, always TP for this message
2

msg_version

 Numeric

-

1

Message version, always 1 for this version of the TP message
3

tp_name

 String

-

GNSS1

Timpulse name (source)
4

timebase

 String

-

UTC

Time base (see below), or null if not available
5

timeref

 String

-

USNO

Time reference (see below), or null if not available
6

tp_tow_sec

 Numeric

s

195391

Timepulse time seconds of week, integer second part (0–604799), or null
7

tp_tow_psec

 Float (.12)

s

0.000000000000

Timepulse time seconds of week, sub-second part (0.000000000000–0.999999999999), or null
8

gps_leaps

 Numeric

s

18

GPS leapseconds, or null if unknown

 

 

Values for timebase:

 

Value Description
null

No timepulse alignment
GNSS

Timepulse aligned to GNSS
UTC

Timepulse aligned to UTC

 

 

Values for timeref if timebase is GNSS:

 

Value Description
GPS

Timepulse aligned to GPS
GAL

Timepulse aligned to Galileo
BDS

Timepulse aligned to BeiDou
GLO

Timepulse aligned to GLONASS
OTHER

Timepulse aligned to other GNSS
other values

Reserved for future use

 

 

Values for timeref if timebase is UTC:

 

Value Description
NONE

Timepulse aligned to no UTC (no precise UTC parameters known yet)
CRL

Timepulse aligned to Communications Research Laboratory (CRL), Japan
NIST

Timepulse aligned to National Institute of Standards and Technology (NIST)
USNO

Timepulse aligned to U.S. Naval Observatory (USNO)
BIPM

Timepulse aligned to International Bureau of Weights and Measures (BIPM)
EU

Timepulse aligned to European laboratories
SU

Timepulse aligned to Former Soviet Union (SU)
NTSC

Timepulse aligned to National Time Service Center (NTSC), China
OTHER

Timepulse aligned to other/unknown UTC
other values

Reserved for future use

 

 

 

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