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NMEA-GP-GLL

Description:

Standard NMEA: Geographic position latitude and longitude. Latitude and longitude of vessel position, time of position fix and status.

This message is actually NMEA-GN-GLL, as it uses information from all GNSS constellations (GN), not GPS only (GP). However, we publish it as NMEA-GP-GLL to maximize compatibility.

Configuration:

  • NMEA-GP-GLL_GNSS for combined (average) output from both receivers

    • The time and position data is the average between GNSS1 and GNSS2.

    • The positioning mode is from the “best” receiver

  • NMEA-GP-GLL_GNSS1 for output from GNSS 1 receiver

    • This is the standard NMEA GLL for GNSS1.

  • NMEA-GP-GLL_GNSS2 for output from GNSS 2 receiver

    • This is the standard NMEA GLL for GNSS2.

  • NMEA-GP-GLL_FUSION for output from Fusion

    • The time and position data is from fusion

    • The positioning mode is from the “best” receiver

Notes:

  • These messages does not contain any information that would let one tell them apart. Do not enable more than one of these in the same port.

  • This message is according to NMEA 0183 v4.11 (and erratas).

  • It uses the “GP” talker ID even though the navigation solution is multi-GNSS.

Example message:

CODE
$GPGLL,4724.01791,N,00827.02194,E,090924.00,A,D*62\r\n

Example message with non-standard high-precision fields:

CODE
$GPGLL,4724.0179042,N,00827.0219438,E,090411.0001,A,D*64\r\n

Message fields:

#

Field

Format

Unit

Nullable

Example

Description

1

lat

ddmm.mmmmm(mm)

-

Y

4723.54036

Latitude

2

lat_ns

Character

-

Y

N

Latitude north (N) or south (S) indicator

3

lon

dddmm.mmmmm(mm)

-

Y

00826.88672

Longitude

4

lon_ew

Character

-

Y

E

Longitude east (E) or west (W) indicator

5

time

hhmmss.ss(ss)

-

Y

151227.40

UTC time (hours, minutes and seconds)

6

status

Character

-

N

A

Data validity status, A (data valid) or V (not valid)

7

mode

Character

-

N

R

Positioning system mode indicator, N (data not valid), E (dead-reckoning), D (differential), A (autonomous), M (manual input not used), S (simulator not used)

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