Hi, Likely a setup problem or some bug, but could one antenna be affecting the other antenna at such a close distance? What happens if you move them 2m apart?
This is something that I want to try once I get my second ublox datalogger working, so I hope that you will provide some feedback on what worked for you. Gordon Williams ----- Original Message ----- From: [email protected] To: [email protected] Sent: Wednesday, June 05, 2013 11:23 PM Subject: [FOSS-GPS] Differential GPS with RTKLIB 2.4.2 Hello, I’am trying to build a differential GPS using RTKLIB 2.4.2. The accuracy that I can achieve is around +/-2 m. Which is about the same that one of my sensor achieves in PPP kinematic mode. My expectation is to achieve something around +/- 5 cm. The set up: Sensors 2 UBLOX NEO6P Antenna Trimble Bullet III 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. Ublox Center Configuration: NEMA Child Messages Disabled UBX Child Messages Enabled RXM-RAW Enabled RXM SFRB Enabled RXM-RATE 200ms Dynamik Mode Pedestrian RTKLIB Configuration Input Streams Rover Serial COM 1, UBLOX Base Serial COM 2, UBLOX Log Streams Rover to File Base to File Solution Log Solution 1 toFile Solution 2 to File Options Positions Base Station Position is acquired by 10hour static measurement. So, with this setting I usually get FLOAT (90%) and intermediate FIX (10%) soloutions with an accuracy of +/- 2m. My expectation is to achieve something around +/- 5 cm. Is my expectation wrong? Have I selected the correct configuration? 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. Can somebody HELP ? ------------------------------------------------------------------------------ _______________________________________________ This message is sent to you from [email protected] mailing list. Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your subscription For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
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