ashtech G12 - PPS: Pulse Per Second

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Commands

Example

Enter the following command to set Port A with a baud rate of 4800, Port B with a

baud rate of 19200, and to reset internal memory:

$PASHS,INI,4,6,1

The INI command is not fully functional with the G12. Since the G12 does not contain a memory area

for data storage, the reset memory code for external memory (2) has no effect on the receiver.

Resetting internal memory (1), or resetting internal and external memory (3) have the same effect.

The parameter settings for this command were maintained for the G12 in order to preserve

consistency with other Ashtech receivers.

ION: Ionospheric and Tropospheric Modeling

$PASHQ,ION,[c1]

This command allows you to query for current ionospheric data generated by the

GPS satellites, where [c1] is the optional port designator for the output of the

response. If a port is not specified, the receiver sends the response to the current

port.

Ionospheric and tropospheric modeling are enabled when the receiver is functioning in stand-alone

mode (autonomous mode), but are disabled if the receiver is set as an RTCM base or rover, since

differential corrections already compensate for ionospheric and tropospheric delays.

$PASHR,ION

The response message is output in binary format:

$PASHR,ION,<Binary Data String + Checksum>

Table 4.20 describes the elements in the binary data string:

Table 4.20. $PASHR,ION Format

Type Size Contents

float 4 a

ionospheric parameter (seconds)

float 4 a