Vector Sensor Reference Manual 32
The antenna separation derived from the RTK solution should be accurate to within a few
millimeters. If you wish, depending on how accurately you measured the separation manually,
update the manually entered separation with the RTK separation.
Note - If the RTK separation and your measured separation differ by more than two
centimeters, we recommend that you update the manual separation with the RTK
separation and force a new search. Again, check the RTK derived separation with the
new manual separation. They should agree very closely, otherwise the RTK
algorithms are choosing the wrong RTK solution. If this is the case, consider how you
have installed the antennas and if there’s any chance that multipath may be
corrupting the solution. Keep in mind that the longer you increase the antenna
separation, the more difficult it is to statistically solve for the correct RTK solution.
Note - The maximum antenna separation that we recommend is 2.0 m. Any increase
beyond this limit is at your risk or the Vector Sensor solving for the wrong RTK
position of the secondary GPS antenna, resulting in an incorrect heading
1.8.14 Summary Command
This command is used to receive a summary of the current Vector Sensor settings. This
command has the following format.
$JATT,SUMMARY<CR><LF>
The Vector Sensor will reply with the following output.
$>JATT,SUMMARY,TAU:H=0.50,HR=2.00,COG=0.00,SPD=0.00,BIAS:H=0.00,P=0.00,FLAG_HE
X:GN-RMTL=01
Chapter 6 summarizes this output in detail.
1.8.15 HELP command
The Vector Sensor supports a command that you can use to get a short list of the supported
commands if you find yourself in the field without documentation.
This commands has the following format.
$JATT,HELP<CR><LF>
The response to this command will be the following.
$>JATT,HELP,CSEP,MSEP,EXACT,LEVEL,HTAU,HRTAU,HBIASPBIAS,NEGTILT,ROLL,TILTAID,T
ILTCAL,MAGAID,MAGCAL,MAGCLR, GYROAID,COGTAU,SPDTAU,SEARCH,SUMMARY
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