FIG Peer Review Journal


Rover Station Positional Accuracies from OPUS as a Function of Reference Station Spacing and Rover Station Occupation Time (3380)

Neil Weston, Tom Soler and Gerald Mader (USA)
Dr. Neil Weston
Research Scientist
1315 East West Hwy
SSMC#3, Rm 8113
Silver Spring
Corresponding author Dr. Neil Weston (email: neil.d.weston[at], tel.: + 1 301-713-2847)

[ abstract ] [ handouts ] [ handouts ]

Published on the web 2009-02-16
Received 2008-12-01 / Accepted 2009-02-16
This paper is one of selection of papers published for the FIG Working Week 2009 in Eilat, Israel and has undergone the FIG Peer Review Process.

FIG Working Week 2009
ISBN 978-87-90907-73-0 ISSN 2307-4086


This research is aimed at determining how and to what extent rover station coordinate accuracies, from the Online Positioning User Service (OPUS), at the National Geodetic Survey (NGS), are influenced by reference station spacing and rover station occupation times. The first phase of the experiment was to treat a large number of stations in the CORS network as rover sites by collecting and submitting RINEX datasets of various occupation times to OPUS. The durations of the datasets from each rover station were chosen to be from one to five hours, mainly because datasets of this duration are frequently collected and processed by engineers, surveyors and GIS/LIS professionals. The data was then submitted to OPUS for processing, but only after several specific conditions were met. The foremost requirement was to constrain how far each of the three reference stations could be from the rover. After all datasets were processed, the solutions were analyzed to determine the overall performance of OPUS when constraining parameters such as baseline length and occupation times varied.
Keywords: GNSS/GPS; Positioning; baseline processing; occupation time; positional accuracies