DBPapers
DOI: 10.5593/SGEM2014/B22/S9.024

DETERMINATION OF DYNAMICAL POSITIONING ACCURACY CHARACTERISTICS OF MTI-G/MEMS MEASUREMENT UNIT USING ASG-EUPOS NAWGEO RTK SERVICE

B. Oszczak, G. Moczulski, S. Oszczak
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-11-7 / ISSN 1314-2704, June 19-25, 2014, Book 2, Vol. 2, 183-190 pp

ABSTRACT
Inertial Navigation System (INS) integrated with Global Navigation Satellite System (GNSS) receiver is widely used for navigation purposes. In case of lack of GNSS signal a position of GNSS receiver is not computed and INS device can be utilised for a position computation. Moreover, INS device can use last known position obtained from GNSS receiver and navigation process can be performed with use of INS device. In this publication the accuracy tests of MEMS/GPS MTi-G device were performed on the moving car in various conditions of satellite visibility. The measurement results of this device were compared with the Real Time Kinematic (RTK) method positioning by using ASG-EUPOS NAWGEO RTK service in Poland. Measured points were collected by using 100Hz and 1 Hz interval for MTi-G and RTK Trimble SPS GNSS receiver, respectively. Synchronisation of the difference of UTC and GPS time was made. The RTK corrections were transmitted using NTRiP format via ASG-EUPOS Polish system of reference GNSS ground stations. RTK method was used for real-time determination of horizontal and vertical coordinates of the collected points. In this publication the accuracy characteristics of MEMS/GPS and RTK GNSS receiver are given. The coordinates obtained from MEMS/GPS measurement unit were compared to the fixed RTK points collected at the same time. Experiment was conducted by using a cabriolet car and the accuracy characteristics results are presented. The GNSS signals were cut off in MEMS/GPS measurement unit and the obtained coordinates were compared to the RTK fixed coordinates. The accuracy characteristics for these experiments are analysed. The results of performed analyses of accuracy are presented and drift characteristics of MEMS unit is determined.

Keywords: INS, MEMS, GNSS, RTK, ASG EUPOS.