B1: Nmea Messages - Overview - Leica GR30 Online Help Manual

Appendix B: NMEA Messages

B1: NMEA Messages - Overview

Background information
National Marine Electronics Association is a standard for interfacing marine electronic devices. This chapter describes all NMEA-0183
messages which can be output by the receiver.
A Talker ID appears at the beginning of the header of each NMEA message. The Talker ID can be user defined or standard (based on
the NMEA 4.0). This is usually GP for GPS, GL for GLONASS, GA for Galileo, BD for BeiDou or GN for GPS/GLONASS/Galileo/BeiDou
in any combination.
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B2: Used symbols for describing the NMEA formats
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B3: GGA - Global Positioning System Fix Data
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B4: GGK - Real time Position with DOP
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B5: GGK(PT) - Real time Position with DOP, Trimble Proprietary
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B6: GGQ - Real time Position with CQ
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B7: GLL - Geographical Position Latitude/Longitude
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B8: GNS - GNSS Fix Data
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B9: GSA - GNSS DOP and Active Satellites
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B10: GSV - GNSS Satellites in View
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B11: RMC - Recommended Minimum Specific GNSS Data
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B12: VTG - Course Over Ground and Ground Speed
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B13: ZDA - Time and Date
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B14: LVM - Leica Velocity Measurement
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B15: LDM - Leica Displacement Measurement
B2: Used symbols for describing the NMEA formats
Background information
NMEA messages consist of various fields. The fields are:
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Header
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Special format fields
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Numeric value fields
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Information fields
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Null fields
Certain symbols are used as identifier for the field types. These symbols are described in this section.
Header
Symbol Field
$ -
Description
Start of sentence
Example
$
245