NavCom Sapphire Rev.J - Manual (Page 129)

Sapphire Technical Reference Manual Rev. J
129
1.74 GGAMODE (ASCII)
SF-3050 Sapphire SF-3040
This command is used to select the low precision mode (keyword LP) or the high precision
mode (keyword HP) for the NMEAGGA output sentence.
The low precision mode is the standard NMEAGGA output stream in compliance with
NMEA-0183 Standards version 3.0. It is limited to a maximum of 80 characters.
The high precision mode is an extended mode for the NMEAGGA output sentence. It is not in
compliance with the NMEA-0183 Standards version 3.0 in terms of message length. The high
precision mode adds two digits of precision for the latitude, longitude, and altitude parameters.
In the high precision mode, the GGA sentence outputs latitude as dd.mmmmmm and longitude
as ddd.mmmmmm, as opposed to the low precision mode, which is dd.mmmm and dd.mmmm.
Also, in the high precision mode, the GGA sentences show altitude as mm.mmm as opposed to
mm.m in the low precision mode.

Refer to NMEAGGA in this manual for the GGA message output format.

The NavCom proprietary NMEA type message, NMEAPNCTGGA, also provides
high precision. Refer to
NMEAPNCTGGA in this manual for the PNCTGGA
message output format.
Command: [GGAMODE] MODE
Parameter Definition
MODE Keywords LP or HP specify the precision for the NMEAGGA output sentence.
Default: LP

The command, [USEPROFILE]
“NONE”, resets all of the user-controlled
configuration parameters to the factory default values. It sets [GGAMODE] to the
default, LP. If the high precision mode for GGA is required after the reset of the
user-controlled parameters, [GGAMODE] HP must be input into the receiver. Or,
NMEAPNCTGGA may be used for high precision.
Examples: [GGAMODE] HP
Specifies high precision mode
[GGAMODE] LP
Specifies low precision mode
[GGAMODE]
Requests output of current setting, “HP” or “LP”
[USEPROFILE] “NONE”
Sets the default to [GGAMODE] LP