NavCom Sapphire Rev.J - Manual (Page 307)

Sapphire Technical Reference Manual Rev. J
307
2.60 NMEAGGA (ASCII)
SF-3050 Sapphire SF-3040
Supported Output Rate: OFF ONCE OnChange OnTime
OnChange = based on [PROCESSRATE]
OnTime = highest rate licensed
This output stream reports position and fix related status information. The NMEAGGA output
stream is in compliance with NMEA 0183 Standards version 3.0.
The NMEAGGA output can be scheduled to change at a set frequency that reflects any
changes in position. The changed NMEAGGA output will automatically be preceeded by a
changed NMEADTM output.

The [GGAMODE] command is used to select the standard NMEAGGA output
stream or high precision for NMEAGGA output. Refer to the [GGAMODE]
command to understand how to add two digits of precision for the latitude,
longitude, and altitude parameters. The NavCom proprietary NMEA type message,
NMEAPNCTGGA, also provides high precision.
The low-precision GGA mode was created to resolve the problem of the
default GGA sentence exceeding the maximum allowed length of 80
characters. However, the low-precision sentence can still exceed 80
characters under worst- case conditions:
Field Length
$GxGGA, 7
UTC (hhmmss.ss,) 10
Lat (ddmm.mmmm,N/S,) 12
Lon (dddmm.mmmm,E/W,) 13
Quality (q,) 2
# Sats used (ss,) 3
HDOP (dd.d,) 5
Alt (aaaa.a,M,) 9
Geoidal sep (-ggg.g,M,) 9
Age (ss.s,) 5
Ref ID (iiii,) 5
Checksum (*cc) 3