A New Network-Based Rapid-Static Module for the NGS Online Positioning User Service – OPUS-RS

Israel Kashani, Pawel Wielgosz, Dorota A. Grejner-Brzezinska, and Gerald L. Mader

Peer Reviewed

Abstract:	The National Geodetic Survey (NGS) operates the On-line Positioning User Service (OPUS) as a means to provide the GPS users with easier access to the National Spatial Reference System. Currently, OPUS accepts a minimum of two hours of GPS data. In order to reduce the required user session duration, a rapidstatic module (OPUS-RS) has been implemented. The OPUS-RS is based on the Wide Area Rapid-Static (WARS) module of the Multi Purpose GPS Processing Software. The new OPUS-RS module reduces the required session duration to 10–15 minutes while centimeter-level accuracy is still achievable. Presented in this paper is the first demonstration and feasibility test of the OPUS-RS. The analysis concerns base-rover distances of 135–162 km. The ambiguity resolution success ratio, speed and reliability, along with the positioning results are analyzed. The resulting coordinate accuracy is better than 1 cm for the horizontal components and better than 3 cm for the vertical one.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 55, Number 3
Pages:	225 - 234
Cite this article:	Kashani, Israel, Wielgosz, Pawel, Grejner-Brzezinska, Dorota A., Mader, Gerald L., "A New Network-Based Rapid-Static Module for the NGS Online Positioning User Service – OPUS-RS", NAVIGATION: Journal of The Institute of Navigation, Vol. 55, No. 3, Fall 2008, pp. 225-234.
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