<div dir="ltr">From my experience i guess you should achieve +-5cm. What is the average SNR you have at your setup? Did you give correct voltage to the antennas? Also have a look at the troposhere and ionosphere correction method you chose. I dont have the knowledge to tell you the best config for them.<div>
Good Luck<br><div style><br></div></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/6/6 <span dir="ltr"><<a href="mailto:rolf.elsing@online.de" target="_blank">rolf.elsing@online.de</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
Hello,<br>
<br>
I’am trying to build a differential GPS using RTKLIB 2.4.2.<br>
The accuracy that I can achieve is around +/-2 m.<br>
Which is about the same that one of my sensor achieves in PPP kinematic mode.<br>
My expectation is to achieve something around +/- 5 cm.<br>
The set up:<br>
Sensors2 UBLOX NEO6P<br>
AntennaTrimble Bullet III<br>
The sensors are installed on the roof with a free 360 °view. RTKLIB indicates that 6 to 8 Satellites are visible. The distance between both sensors is < 20 cm.<br>
<br>
Ublox Center Configuration:<br>
NEMA Child Messages Disabled<br>
UBX Child Messages Enabled<br>
RXM-RAW Enabled<br>
RXM SFRB Enabled<br>
RXM-RATE 200ms<br>
Dynamik Mode Pedestrian<br>
RTKLIB Configuration<br>
Input Streams<br>
Rover Serial COM 1, UBLOX<br>
Base Serial COM 2, UBLOX<br>
Log Streams<br>
Rover to File<br>
Base to File<br>
Solution Log<br>
Solution 1 toFile<br>
Solution 2 to File<br>
Options<br>
Positions<br>
Base Station Position is acquired by 10hour static measurement.<br>
<br>
So, with this setting I usually get FLOAT (90%) and intermediate FIX (10%) soloutions with an accuracy of +/- 2m.<br>
My expectation is to achieve something around +/- 5 cm.<br>
Is my expectation wrong?<br>
Have I selected the correct configuration?<br>
When I run the sensors stand alone in PPP Kinematic mode I also get around +/- 2m accuracy which matches the manufacturer provided data.So I assume that my Antenna, Sensor are working fine.<br>
Can somebody HELP ?<br>
<br>
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<br></blockquote></div><br></div>