DBPapers
DOI: 10.5593/SGEM2015/B22/S9.049

NETWORK REAL-TIME KINEMATIC APPROACH FOR NORMAL HEIGHT DETERMINATION ON ASG-EUPOS SYSTEM EAMPLE

K. Dawidowicz
Monday 21 September 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-35-3 / ISSN 1314-2704, June 18-24, 2015, Book2 Vol. 2, 391-398 pp

ABSTRACT
The Network Real-Time Kinematic (NRTK) GNSS technology is increasingly being utilised for a wide range of surveying and mapping applications, providing users with instant and highly accurate position information over distances of several tens of kilometers. As of June 2008, NRTK GPS surveying is available in Poland with the aid of ASG-EUPOS service.
Although generally, NRTK height measurements have good precision it is well know that often some systematic differences between heights obtained using different types of corrections occured. Depending on the used type of correction heights can differ up to several centimeters.
This paper reviews the principles behind the two prevalent NRTK methodologies currently available, the Virtual Reference Station (VRS) approach and the Master-Auxiliary Concept (MAC) as well as RTK positioning using single station mode. Additionally the paper presents an approach to the RTK technology based on the simultaneous use of different RTK positioning modes (VRS, MAC and SS). Analysis and rejecting outliers results can be helpful in obtaining more reliable height even under trees or urban conditions. Analysis were conducted at six representative point locations.

Keywords: RTK, NRTK, ASG-EUPOS, height determination