Novatel OM-20000041 用户手册
C
Commands Summary
126
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
SETNAV
This command permits entry of one set of navigation waypoints (see Figure C-5). The origin (
FROM
) and
destination (
TO
) waypoint coordinates entered are considered on the ellipsoidal surface of the current datum
(default
WGS84
). Once
SETNAV
has been set, you can monitor the navigation calculations and progress by observing
the
NAVA
/
B
,
GPRMB
, and
GPZTG
log messages.
Track offset is the perpendicular distance from the great circle line drawn between the
FROM
lat-lon and
TO
lat-lon
waypoints. It establishes the desired navigation path, or track, that runs parallel to the great circle line, which now
becomes the offset track, and is set by entering the track offset value in meters. A negative track offset value
indicates that the offset track is to the left of the great circle line track. A positive track offset value (no sign
required) indicates the offset track is to the right of the great circle line track (looking from origin to destination).
See Figure C-5 for clarification.
becomes the offset track, and is set by entering the track offset value in meters. A negative track offset value
indicates that the offset track is to the left of the great circle line track. A positive track offset value (no sign
required) indicates the offset track is to the right of the great circle line track (looking from origin to destination).
See Figure C-5 for clarification.
Syntax:
Example:
setnav 51.1516,-114.16263,51.16263,-114.1516,-125.23,from,to
SETNAV
from-lat
from-lon
to-lat
to-lon
track offset
from-port
to-port
SETNAV
disable
Syntax
Range Value
Description
Default
Example
SETNAV
-
Command
setnav
from-lat
0± 90
Origin latitude in units of degrees/decimal degrees. A negative
sign implies South latitude. No sign implies North latitude.
sign implies South latitude. No sign implies North latitude.
disable
51.1516
from-lon
0± 360
Origin longitude in units of degrees/decimal degrees. A
negative sign implies West longitude. No sign implies East
longitude.
negative sign implies West longitude. No sign implies East
longitude.
-114.16263
to-lat
0± 90
Destination latitude in units of degrees/decimal degrees
51.16263
to-lon
0± 360
Destination longitude in units of degrees/decimal degrees
-114.1516
track offset
0± 1000
Waypoint great circle line offset (in kilometers); establishes
offset track; positive indicates right of great circle line; negative
indicates left of great circle line
offset track; positive indicates right of great circle line; negative
indicates left of great circle line
-125.23
from-port
1 to 5 characters
Optional ASCII station name
from
to-port
1 to 5 characters
Optional ASCII station name
to