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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:

CODE
$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

7

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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