Specifications

Command/Response Formats 89
Commands
The Reset Memory Codes 0 and 2 behave like a power cycle. Any parameters not saved with the
$PASHS,SAV command are lost. Code 1 and 3 will reset all parameters to default as well as the
ephemeris and almanac (i.e., creates a cold start).
ION: Set Ionospheric Model
$PASHS,ION,c
Enable or disable the ionospheric model to compensate for ionospheric and
tropospheric delay in the position computation, where c is either N (disable) or Y
(enable). Default is N (disable).
Example: Enable ionospheric model.
$PASHS,ION,Y <enter>
ION: Query Ionospheric Parameters
$PASHQ,ION,c
Query current ionosphere data information through port c, where c is the optional
output port and is not required to direct the response message to the current
communication port.
The ionosphere data is not computed by the receiver. It is obtained from the frame data transmitted
by the satellites.
Example: Query the ionosphere parameters to port C.
$PASHQ,ION,C <enter>
$PASHR,ION
Ionosphere and GPS-to-UTC data conversion parameters. See ICD-GPS-200 for the
definition and the description of the model.
Format: $PASHR,ION,<ION Structure> <enter>
Table 6.16: Reset Memory Codes
Reset Memory Code Action
0 No memory reset
1 Reset internal memory/battery back-up
memory
2 Reset/reformat PCMCIA card
3 Reset internal memory and PCMCIA card