FixPosition Vision-RTK 2 - GNSS Output; Nmea-Gp-Gga

7.6. GNSS output
7.6.1. NMEA-GP-GGA
This message contains time, date, position (in LLH coordinates), fix quality, number of
satellites, and horizontal dilution of precision (HDOP) data provided by the GNSS re-
ceiver. This message can be one of the following:
• NMEA-GP-GGA_GNSS for combined (average) output from both receivers.
• NMEA-GP-GGA_GNSS1 for output from GNSS 1 receiver.
• NMEA-GP-GGA_GNSS2 for output from GNSS 2 receiver.
Note that these messages do not contain any information that would let one tell them
apart. Do not enable more than one of these in the same port.
Example message:
1 $GPGGA ,151229.4 0 ,47 23.5 4108 , N ,00826.88485 , E ,4 ,12 ,00.98 ,473.5 , M , , ,,*3 A\ r\ n
Example message with non-standard high-precision fields:
1 $GPGGA , 151229. 3999 ,47 23.5410 795 , N ,0082 6.88 48463 , E ,4 ,31 ,00.98 ,473.5368 ,
M , , , ,*0 F\r\n
Message fields:
# Field Format Unit Example Description
1 time hhmmss.ss(ss) - 151229.40
UTC time (hours, minutes and
seconds)
2 lat ddmm.mmmmm(mm) - 4723.54108 Latitude
3 lat_ns Character - N
Latitude north (N) or south (S)
indicator
4 lon dddmm.mmmmm(mm) - 00826.88485 Longitude
5 lon_ew Character - E
Longitude east (E) or west (W)
indicator
6 quality Digit - 4
Quality indicator, 4 (RTK fixed),
5 (RTK float), 1 (no RTK), 6, 0
7 num_sv Decimal - 12
Number of satellites, range 00-
12
8 hdop Float (.2) - 00.98
Horizontal dilution of precision,
range 00.10-99.99
9 alt Float (.1/.4) m 473.5 Altitude (above ellipsoid)
10 alt_unit Character - M Altitude unit, always M (metres)
11 sep - - Geoid separation, always null
12 sep_unit - -
Geoid separation unit, always
null
13 diff_age - -
Age of differential data, always
null
14 diff_sta - - DGPS station ID, always null
Table 7.19.: NMEA-GP-GGA message format
Vision-RTK 2 | Fixposition Positioning Sensor 66