Heading Update Data Commands

The following commands are related to heading update data and are only applicable if you are doing inertial processing.

Command	-hmrfile [input]
Example	-hmrfile “C:\My Data\Rover.hmr”
Description	Specifies the location of the heading update (HMR) data file.
Input	Full file path to Heading update (HMR) file.
Notes	This file must be in the HMR format. No other format is accepted. NovAtel SPAN users should ignore this command (see –remfile). Wrap the path in quotation marks if it contains spaces.
Required?	Required for inertial users if heading update data was not collected from a NovAtel SPAN system.

Command	-hmrla [X] [Y] [Z]
Example	-hmrla 0.200 0.465 2.114
Description	Specifies the IMU-to-secondary GNSS antenna lever arm.
Input	The X/Y/Z spatial offsets, in meters, from the IMU to the secondary GNSS antenna.
Notes	The offsets must be referenced in the X-right, Y-forward, Z-up frame. The IMU’s center of navigation is the origin of the frame.
Required?	Only if the values are not already written in the header of the HMR file.