Programming Manual 86
Data Field Description
lat This is the latitude of the reference point in degrees decimal degrees.
lon This is the longitude of the reference point in degrees decimal degrees.
height This is the ellipsoidal height of the reference point in m. Ellipsoidal
height can be calculated by adding the altitude and the geiodal
separation, both available from the GGA sentence. See example below.
Example of ellipsoidal height calculation:
$GPGGA,173309.00,5101.04028,N,11402.38289,W,2,07,1.4,1071.0,M,-
17.8,M,6.0, 0122*48
ellipsoidal height = 1071.0 + (-17.8) = 1053.2 meters
The receiver will reply with the following response:
$>JRAD,1,lat,lon,height
Note - Both latitude and longitude must be entered as values with
a decimal place. The receiver will not accept the command if
there are no decimal places.
9.4 $JRAD,2
This command is used to force the receiver to use the new reference point.
This command is normally used following a $JRAD,1 type command.
This command has the following format:
$JRAD,2<CR><LF>
The receiver will reply with the following response:
$>JRAD,2,OK
9.5 $JRAD,3