Precis-BX305 Static RTK Results Released

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Hi all,

Following the video “RTK centimeter accuracy road test with IMU”, below you can find a static RTK positioning result figure to demonstrate the Precis-BX305 product performance. The figure shows the real-time positioning results with radio data link and here is short description.

Receiver: a pair of Precis-X305 boards
Location: Roof of building
Time span: 1 hour
Baseline length: about 5m
Solution type: real-time solution

Views: 1983

Comment by kiki boy on June 17, 2016 at 2:31am

I think, some more information should be added !

Do you correct data's with known point or in post process or this is just raw data's ?

Comment by Tersus GNSS on June 17, 2016 at 2:40am

real-time means not post-processing. its RTK results. The base station is known point.

Comment by Hugues on June 17, 2016 at 4:56am

So is it correct to interpret the graph as a 2D location precision of about +/- 4 meters ? (biggest distance spread being the diagonal of the square around your circle : 3 x 1,42). If so, isn't it a bit disappointing versus the few meters precision of a normal GPS ? (I get sometimes one meter with clear skies on good days with a regular M8N Ublox)

Comment by Billy B on June 17, 2016 at 5:46am


So it's in the order of millimeters.

Comment by kiki boy on June 17, 2016 at 5:59am

Should be better to see corrected data's with in real time Ntrip/rtcm correction or in post. Otherwise if we do not use correction from network your devices are useless !

Comment by Tersus GNSS on June 17, 2016 at 7:24am

Sure, we can add more according to your request.  but it's not useless when you are not using network data. lot's of agriculture and survey project or UAV use standalone base station. That‘s also why people buy two Precis 305 board as kits, and why we sell two. one of the boards is acting as base station. that's also our test scenario setup.

Comment by Hugues on June 17, 2016 at 8:23am

Thx Billy, much better indeed!

Comment by Tom Pittenger on June 17, 2016 at 9:38am

the chart being in x10^-3 is a small detail that is easily missed. That's the huge feature.

Comment by John Rambo on June 17, 2016 at 12:23pm

I might sound noobish, but how on earth do you determine N & E error. I mean, how do you know the coordinates of a fixed point(i.e. base-station) you're measuring error against, with such level of accuracy?

Comment by RPM on June 17, 2016 at 12:32pm

John, you know what your base coordinates are supposed to be, to the millimeter. So you compare your measured results against that known base coord. Survey monument exact locations are published, secondary control networks are derived from these monuments with great precision.


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