Posted in portal.gznq.com | edit | March 9th, 2010
I have a Trimble Pathfinder XL Pro Differential GPS unit.
In NEMA mode, this unit will update the current position at up to 1HZ.
I need to get position data updates at least 5 times per second
wihtout loosing decimeter precision.
I am hoping there is either a way to (1) set the unit to output
updates at faster than 1HZ, or (2) a way to request the current the
position from the unit in a way where I could send 5 requests per
second.
I'll accept any answer that results in me getting decimeter precise
location info from this unit at 5HZ while moving at up to 10 m/s.Looking into the equipment specifications on Trimble's website it
appears that if you wish a higher update rate you will have to have
custom firmware written. This particular GPS unit does not appear to
speak anything but RTCM and NMEA. Other GPS units usually have a
proprietary protocol to speak with software or hardware made by the
same company and provided increased functionality which may allow for
faster updates.I think the unit does know some other sort of propriatary 2-way
protocol becuase, for example, the "Pathfinder Controler" software
package can change internal configuration settings and display interal
status info of a connected unit. I don't know if that protocol
includes any sort of "Calcualte and output position NOW" command, but
it seem like it might.
Thanks.#If you have any other info about this subject , Please add it free.# |
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