Hexagon Veripos LD8 - 5.2 LD8 output sentences; 5.2 LD8 output sentences Overview; 5.2.1 NMEA talker IDs

5.2 LD8 output sentences
5.2 LD8 output sentences
This section outlines the structure of the following message output types:
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GGA
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GST
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ZDA
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GSA
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VTG
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GSV
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GLL
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GRS
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RMC
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HDT
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TRINAV
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Veripos UKOOA
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BESTPOS
5.2.1 NMEA talker IDs
The NMEA talker identifier serves to define the nature of the data being transmitted. The talker is the first
two characters after the $ sign within the NMEA sentence. As the LD8 is capable of utilising more than
only the GPS constellation, the talker has a set value for each constellation. For sentences where the
data relates to multiple constellations the ID ‘GN’ will be found.
Not all NMEA sentences will have a variable talker ID (the GGA and ZDA will be fixed with GP) however
all other NMEA messages will have a variable talker.
Note that the talker ID is determined by the constellation/s in use and cannot be changed to another
value.
The table below shows the talker IDs and the represented constellation:
Talker ID Constellation
GP GPS
GL GLONASS
GA Galileo
BD BeiDou
GQ QZSS
GN Multiple Constellations
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LD8 Operations Manual