NavCom Sapphire Rev.J - Manual (Page 311)

Sapphire Technical Reference Manual Rev. J
311
2.62 NMEAGNS (ASCII)
SF-3050 Sapphire SF-3040
Supported Output Rate: OFF ONCE OnChange OnTime
OnChange = based on [PROCESSRATE]
OnTime = highest rate licensed
This output message reports geographic position (latitude and longitude) information for single
or combined satellite navigation systems and is in compliance with NMEA-0183 Standards
version 3.0.
Refer to the [GGAMODE] command to understand how to add two digits of precision for the
latitude and longitude parameters.
Table 149: GNS Message Output Format
Output
Format:
$GPGNS,time,lat,N/S,lon,E/W,mode,used,HDOP,alt,separation,age,ID,status*checksum
Field# Field Name Description
F1 Time
UTC time for position fix in hours, minutes, seconds
(hhmmss.ss) (000000.00 to 235959.99)
F2 Lat
Latitude in decimal degrees and minutes (ddmm.mmmm)
(0000.0000 to 8959.9999)
High precision: (ddmm.mmmmmm) (0 to 8959.999999)
F3 N/S Direction of latitude (N=north, S=south)
F4 Lon
Longitude in decimal degrees and minutes
(dddmm.mmmm) (00000.0000 to 17959.9999)
High precision: (dddmm.mmmmmm) (0 to 17959.999999)
F5 E/W Direction of longitude (E=east, W=west
F6 Mode indicator
A variable length character field with the first two
characters defined: the first character indicates use of
GPS satellites and the second character indicates use
of GLONASS satellites.
A = Autonomous. Non-differential mode.
D = Differential.
F = RTK Float.
N = No fix.
P = Precise.
R = RTK Fixed.
F7 Used Total number of satellites in use, 00-99.
F8 HDOP Horizontal Dilution of Precision, 1 (ideal) to >20 (poor).
F9 Alt
Altitude above mean sea level (geoidal height) in meters,
a theoretical value that for practical purposes can range
from -50 or so for low places on Earth, to very large
positive values for the heights. NMEAGNS: mm.m
F10 Separation
Geoidal Separation: the difference between the WGS-84
earth ellipsoid surface and mean-sea-level (geoid)
surface, “-“ = mean-sea-level surface below WGS-84
ellipsoid surface.