A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Interpreting OPUS-Static Results Accurately
AbstractThe Online Positioning User Service (OPUS) operated by the National Geodetic Survey (NGS) has consolidated into a very attractive tool for surveyors, engineers, and the academic community to procure precise/accurate positions from global positioning system (GPS) observations. The OPUS utility continues to be improved since it was successfully launched in 2000. In general, each update results in better reliability of the precision and accuracy of OPUS solutions. However, necessary software modifications could also introduce certain biases, some significant, complicating the interpretation of OPUS results, particularly for applications that rely on high-accuracy absolute positions. This article concentrates on the interpretation of OPUS-Static solution reports primarily in relation to the transformation of reference frames and geoid models, which are two basic scientific ingredients in practical geodetic-surveying enterprises. One-year continuous GPS observations collected at a landslide site in Puerto Rico were uploaded to OPUS-Static on April 20, 2011; October 30, 2013; and April 29, 2015. The OPUS solutions obtained at these three dates were compared. This case study indicates that very considerable changes in orthometric height and horizontal coordinates could occur among OPUS outputs processed at different dates. OPUS users who focus on absolute positional coordinates should pay special attention to the periodic updating of reference frames and geoid models by NGS.
Interpreting OPUS-Static Results Accurately
AbstractThe Online Positioning User Service (OPUS) operated by the National Geodetic Survey (NGS) has consolidated into a very attractive tool for surveyors, engineers, and the academic community to procure precise/accurate positions from global positioning system (GPS) observations. The OPUS utility continues to be improved since it was successfully launched in 2000. In general, each update results in better reliability of the precision and accuracy of OPUS solutions. However, necessary software modifications could also introduce certain biases, some significant, complicating the interpretation of OPUS results, particularly for applications that rely on high-accuracy absolute positions. This article concentrates on the interpretation of OPUS-Static solution reports primarily in relation to the transformation of reference frames and geoid models, which are two basic scientific ingredients in practical geodetic-surveying enterprises. One-year continuous GPS observations collected at a landslide site in Puerto Rico were uploaded to OPUS-Static on April 20, 2011; October 30, 2013; and April 29, 2015. The OPUS solutions obtained at these three dates were compared. This case study indicates that very considerable changes in orthometric height and horizontal coordinates could occur among OPUS outputs processed at different dates. OPUS users who focus on absolute positional coordinates should pay special attention to the periodic updating of reference frames and geoid models by NGS.
Interpreting OPUS-Static Results Accurately
Soler, Tomás (author) / Wang, Guoquan
2016
Article (Journal)
English
Interpreting OPUS-Static Results Accurately
| Online Contents | 2016
| DataCite | 1979
Interpreting Negative Test Results
| Taylor & Francis Verlag | 1989
TIBKAT | 2004-2018, Ausgabe 6 ; 85 (Februar 2019)-100 (August 2021) ; damit Erscheinen eingestellt
Opus - Neubau der Sparkasse Seeheim-Jugenheim. Entwurf: OPUS Architekten
Online Contents | 1996