User`s guide

Chapter 5 - I/O Commands

POSITION HOLD PARAMETERS MESSAGE (@@As)

Applicability: M12+ Positioning and Timing receivers

The user can specify Position Hold coordinates both for timing applications to increase the timing

accuracy and when the receiver is used as a source of differential correction data. This command

is used to enter the position to be held.

The position is specified in the same units and referenced to the same datum as the initial

position coordinates of latitude, longitude and height (to the same resolution). The height

parameter is referenced to the GPS reference ellipsoid. Note that all three parameters must be

specified. The valid ranges of each parameter are the same as those specified in the Combined

Position Message (@@Ga).

Note: This command will only be executed if Position Hold is disabled. Position Hold is controlled

using the @@Gd message.

Default values: Latitude = 0° (Equator)

Longitude = 0° (Greenwich Meridian)

Height = 0 m (GPS Height)

Legacy Code Compatibility: The @@As command has been implemented in a similar fashion on

the older Motorola VP and UT/UT+ Oncore receivers.

Motorola GPS Products - M12+ User's Guide Revision 6.X 09FEB05