REFERENCE MANUAL - FTP Directory Listing - Trimble
REFERENCE MANUAL - FTP Directory Listing - Trimble
REFERENCE MANUAL - FTP Directory Listing - Trimble
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TRIMBLE STANDARD INTERFACE PROTOCOL (TSIP)<br />
A<br />
Key Setup Parameters or Packet BB<br />
Selecting the correct operating parameters has significant impact on receiver<br />
performance. Packet 0xBB (set receiver configuration) controls the key setup<br />
parameters.<br />
The default operating parameters allow the receiver to perform well in almost any<br />
environment. The user can optimize the receiver to a particular application if the<br />
vehicle dynamics and expected level of obscuration are understood. If the receiver is<br />
then taken out of this environment, the specifically tuned receiver may not operate as<br />
well as a receiver with the default options<br />
Table A.10<br />
Key Setup Parameters or Packet BB.<br />
Parameter<br />
Factory Default<br />
Dynamics code<br />
Land<br />
Elevation mask 5°<br />
SBAS on/off<br />
WAAS_Auto<br />
The default values in Table A.10 allow the receiver to operate well under the most<br />
varied and demanding conditions. A user may choose to change the default<br />
parameters if the receiver is only required to perform in a specific or limited<br />
environment. The user should be warned that when the receiver is exposed to<br />
operating conditions which are different from the conditions described by the user<br />
setup, then the performance may be degraded.<br />
Initially, the user must consider the environment in which the receiver is expected to<br />
operate. There is a trade-off between how frequently a position fix is output versus<br />
the absolute accuracy of the fix. The user must decide which takes priority and then<br />
make the appropriate selections. This becomes increasingly important when frequent<br />
satellite blockages are expected, as in downtown “urban canyon” environments and<br />
heavily foliated areas.<br />
Following is a description of the key fields in Packet 0xBB.<br />
Dynamics Code<br />
The feature default is LAND mode, where the receiver assumes a moderate dynamic<br />
environment. In this case, the satellite search and re-acquisition routines are<br />
optimized for vehicle type environments. In SEA mode, the search and re-acquisition<br />
routines assume a low acceleration environment. In AIR mode, the search and reacquisition<br />
routines are optimized for high acceleration conditions.<br />
Copernicus GPS Receiver 129