Three-dimensional modeling of building environments and indoor positioning is essential for emergency response in cities. Traditional ground-based measurement methods, such as geodetic astronomy, total stations, and global positioning system (GPS) receivers, cannot meet the demand for high precision positioning and it is therefore essential to conduct multiple-angle data-acquisition and establi...

Ramon Hanssen is assistant-professor in geostatistics, working on radar remote sensing for geodetic applications. Peter Teunissen is professor of Mathematical Geodesy and Positioning and authored the Lambda method. Peter Joosten graduated at the Faculty of Geodesy of Delft University of Technology. The authors are currently engaged in the development of ambiguity resolution algorithms for GPS d...

Permanent GPS networks have been established since the 1980s to support a variety of geodetic applications, ranging from local deformation monitoring to large scale crustal motion measurement. Continuously operating GPS (CGPS) networks, consisting of geodetic-grade, dual-frequency receiver systems, generally support relative positioning to sub-centimetre accuracy, even for baselines up to sever...

Since its introduction to civilian users in the early 1980's, the Global Positioning System (GPS) has been playing an increasingly important role in high precision surveying and geodetic applications. Like traditional geodetic network adjustment, data processing for precise GPS static positioning is invariably performed using the least squares method. To employ the least squares method for GPS ...

Krueger, C. P., Soares, C. R., Huinca, S. C. M., Leandro, D. and Gonçalves, R. M., 2011. Satellite Positioning on the Coast of the Parana, Brazil. Journal of Coastal Research, SI 64 (Proceedings of the 11th International Coastal Symposium), 1352 – 1356. Szczecin, Poland, ISSN 0749-0208 This paper describes different surveys developed by the Spatial Geodetic Laboratory (LAGE) of the Federal Univ...

A common problem faced by most countries is the estimation of precise transformation parameters between their national geodetic datum, and the World Geodetic System 1984 (WGS84) global datum, used by the Global Positioning System (GPS). There can be considerable difference in positions of the local ellipsoidal datum and the global datum, sometimes up to several hundred meters. So a country like...

Prior research has shown that the currently deployed geodetic global positioning system (GPS) stations can be used to measure snow depth in an area around the antenna installation via GPS interferometric reflectometry (GPS-IR). Although such a technique provides the advantages of large spatial coverage and high temporal measurement sampling, there are also drawbacks in using geodetic equipment ...

This paper presents a method to derive local sea level variations using data from a single geodetic-quality Global Navigation Satellite System (GNSS) receiver using GPS (Global Positioning System) signals. This method is based on multipath theory for specular reflections and the use of Signal-to-Noise Ratio (SNR) data. The technique could be valuable for altimeter calibration and validation. Da...

Since the definition of the Geocentric Datum of Australia in 1994 (GDA94), Australia has had a GPS continuously operating reference station (CORS) network for datum maintenance. The Australian Fiducial Network (AFN) now comprises eight geologically stable, geodetic quality GNSS CORS stations which also contribute to the Australian Regional Geodetic Network and the International GNSS Network. In...

Observations of surface deformation are essential for understanding a wide range of geophysical problems, including earthquakes, volcanoes, landslides, and glaciers. Current geodetic technologies, such as global positioning system (GPS), interferometric synthetic aperture radar (InSAR), borehole and laser strainmeters, are costly and limited in their temporal or spatial resolutions. Here we pre...