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WAAS G-III Reference Receiver User Manual Rev 1
Chapter 4
Commands
4.4.11
FIX
This command fixes the position parameters for the G-III Reference Receiver. The position parameters are
accepted relative to the WGS-84 ellipsoid.
Valid States
: Configuration
Valid Modes
: Normal
Acceptable Ports
: Data
Syntax:
FIX type [latitude longitude height]
Example:
FIX position 51.4 -114.652 1000.63
FIX none
This command should be sent to the receiver as the receiver does not calculate its own position.
If the position is not accurate, the acquisition of signals may be affected.
Field
Field Name
Description
Range
Precision
1
type
Fix type.
When this field is set to
position
, the following
optional fields are required.
position
none
N/A
2
latitude
Latitude of the receiver position in decimal
degrees. Must be accurate to 1e-10 degrees.
[Optional]
-90 to +90
double
3
longitude
Longitude of the receiver position in decimal
degrees. Must be accurate to 1e-10 degrees.
[Optional]
-180 to +180
double
4
height
Ellipsoidal height of the receiver in metres. Must
be accurate to 0.001 metres.
[Optional]
-1000 to +20000000
double
When a “FIX none” command is issued, the receiver will not have a position, nor will it
calculate one. Time is also not calculated. The resolution of the input parameters is required for
1 mm position accuracy.