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Chapter 5 Command Reference
GPS Satellite Acquisition
5-10 Operating and Programming Guide
Facilitating Initial Tracking ____________________
(continued)
This command sets an approximate position for faster initial GPS acquisition.
Following powerup, the Receiver refines its position from the satellite data.
This process occurs automatically. This command is most effective when the
retained position differs significantly from the Receiver’s true position.
Expanded Syntax
:GPS:INITial:POSition N or S, <latitude degree>,
<latitude minute>,
<latitude second>,
E or W, <longitude degree>,
<longitude minute>,
<longitude second>,
<height above the GPS ellipsoid, in meters (58303B)>
or
<height above mean sea level, in meters (59551A)>
Parameter
This command requires three position coordinates: latitude, longitude, and
height. Position must be specified with respect to the World Geodetic System
1984 (WGS-1984) datum absolute earth coordinates.
The latitude coordinate is preceded by either N or S, which denotes the
northern or southern hemisphere, respectively. The longitude coordinate is
preceded by either E or W, which denotes the eastern or western hemisphere,
respectively.
The following table lists the allowed settings of other parameters:
Context Dependencies
This command is valid while the Receiver is in survey mode prior to first
computed position. Sending this command while the Receiver is not in survey
mode will generate error -221.
:GPS:INITial:POSition . . .
:SYSTem:PRESet
Sets an approximate position for faster initial GPS acquisition.
:Not affected
VOLATILE
Parameter Range Precision Parameter Range Precision
<latitude degrees> 0 to 90 1 <longitude degrees> 0 to 180 1
<latitude minutes> 0 to 59 1 <longitude minutes> 0 to 59 1
<latitude seconds> 0 to 59.999 0.001 <longitude seconds> 0 to 59.999 0.001
<height, m> -1000.00 to
18,000.00
0.01