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LT-300 User & Installation Manual
GNSS Talker Identifier
The first two characters in the address field of an NMEA 0183 sentence is the Talker Identifier (e.g. "GN" in
the address field "GNRMC"). The Talker Identifier may be used to determine the source of a sentence, when
it can have multiple sources. In case of the GNSS related sentences (DTM, GGA, GLL, GSA, GSV, RMC, VTG,
ZDA), the Talker Identifier can be used to determine from which specific GNSS system the data originates:
GN Talker Identifier is a special case that indicates the sentence data originates from multiple GNSS systems.
This is the case when the LT-300 is configured (see GNSS satellite receiver configuration on page 28) to use
multiple GNSS systems: GPS + GLONASS or GPS + BeiDou.
The GSV sentence will never be sent with Talker Identifier GN as it will ever only contain data from one GNSS
system. If the LT-300 GNSS Receiver is configured to use multiple GNSS systems, the GSV sentence will be
repeated for each GNSS system and the Talker Identifier of each GSV sentence will indicate the specific GNSS
system to which it applies.
Lars Thrane A/S
GNSS Talker Identifier
Talker Identifier
GB
BeiDou
GL
GLONASS
GN
Multiple GNSS'
GP
GPS, SBAS, or QZSS
T
9: GNSS T
I
ABLE
ALKER
DENTIFIER
www.thrane.eu
App. D - NMEA 0183 Sentences
GNSS Type
36 of 39
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