Hemisphere GPS V104s - Common Commands and Messages

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Chapter 3: Operation
Common Commands and Messages
Note: When selecting your baud rate and message types, use the following
calculation to determine your baud rate for your required data throughput.
Messages * Message output rate * Message length (bytes) * bits in byte
Ex: 5 * 10Hz * 40 bytes * 10 = 20,000 bits/sec
For information on message output rates refer to GPS Technical Reference
available from the Hemisphere GNSS website at
www.hemispheregnss.com.
Table 3-2 below through Table 3-4 provide brief descriptions of common
commands and messages for the V104s. Refer to the Hemisphere GNSS’
GPS Technical Reference for more detailed information.
Table 3-2: Commands
Command Description
$JAGE Specify maximum DGPS (COAST) correction age (6 to 8100
seconds)
$JAPP Query or specify receiver application firmware
$JASC Specify ASCII messages to output to specific ports (see ASCII
messages in Table 3-3)
$JBAUD Specify RS-232, RS-422 (output) communication rate
$JBIN Specify binary messages to output to specific ports (see
Table 3-4)
$JDIFF Query or specify differential correction mode
$JGEO Query or specify SBAS for current location and SBAS satellites
$JI Query unit’s serial number and firmware versions
$JOFF Turn off all data messages
$JQUERY,GUIDE Query accuracy suitability for navigation
$JRESET Reset unit’s configuration to firmware defaults
$JSAVE Save session’s configuration changes