VMF3/GPT3: refined discrete and empirical troposphere mapping functions39 DownloadsLandskron, D., Böhm, J. VMF3/GPT3: refined discrete and empirical troposphere mapping functions. J Geod 92, 349–360 (2018). https://doi.org/10.1007/s00190-017-1066-2 Abstract Incorrect...
Geoid determination using airborne gravity42 DownloadsGoli, M., Foroughi, I., Pagiatakis, S. et al. Geoid determination using airborne gravity vectors. Earth Planets Space 77, 167 (2025). https://doi.org/10.1186/s40623-025-02277-8 Abstract In traditional airborne...
A New Method to Model the Ionosphere across Local Area Networks37 DownloadsABSTRACT In addition to an overall quasi-periodic 24 hour cycle, the ionosphere features many irregular disturbances. The detailed structure and dynamical evolution of the ionosphere continues...
Real-Time Carrier Phase Ambiguity Resolution for GPS/GLONASS Reference Station Networks35 DownloadsABSTRACT Real-time high precision GPS surveying and navigation applications have been constrained to ‘short range’ due to the presence of distance-dependent...
Development of an improved empirical model for slant delays in the troposphere (GPT2w)34 DownloadsBöhm, J., Möller, G., Schindelegger, M. et al. Development of an improved empirical model for slant delays in the troposphere (GPT2w). GPS Solut 19, 433–441 (2015)....
Testing of global pressure/temperature (GPT) model and global mapping function (GMF) in GPS analyses34 DownloadsAbstract Several sources of a priori meteorological data have been compared for their effects on geodetic results from GPS precise point positioning (PPP)....
A Precision Ag Primer from Delta Data Systems39...
A Real Time GPS Reference Network for Cadastral Surveys in Recife Brazil37 DownloadsABSTRACT The establishment and maintenance of geodetic reference frames which are an essential foundation for all surveys related to land management, GIS and large scale mapping are...
Building Up On Railway Coordinates32 DownloadsSummary The goal of the interdisciplinary, international meeting called “railway project 2009” was to outline the requirements needed to progress towards interoperable railway infrastructure data based on absolute...
Design and Implementation of a Real Time Gps Network for the Metropolitan Water District of Southern California35 DownloadsABSTRACT The Metropolitan Water District (MWD) of Southern California, in collaboration with the Scripps Orbit and Permanent Array Center (SOPAC)...
Development of SydNET Permanent Real-time GPS Network29 DownloadsAbstract Over the past few years, there has been substantial growth in multiple-reference-station networks used to overcome the limitations of standard real-time kinematic (RTK) systems. SydNET is a...
First results from Virtual Reference Station (VRS) and Precise Point Positioning (PPP) GPS research at the Western Australian Centre for Geodesy24 DownloadsAbstract Over the past 18 months, a team in the Western Australian Centre for Geodesy at Curtin University of...
Fitting Gravimetric Geoid Models to Vertical Deflections41 DownloadsAbstract Regional gravimetric geoid and quasigeoid models are now commonly fitted to GPS-levelling data, which simultaneously absorbs levelling, GPS and quasi/geoid errors due to their inseparability....
Real-Time GPS Network Analysis Using the IGS Ultra-Rapid Satellite Orbits Applied for Displacements Monitoring30 DownloadsSUMMARY The paper shortly describes the ultra-rapid orbits of GPS satellites and their potential applications in real-time monitoring of position...
Using The Virtual Reference Stations (Vrs) Concept For Long-Range Airborne Gps Kinematic Positioning27 DownloadsABSTRACT In this paper, the potential of long-range kinematic GPS positioning with a multiple reference station (MRS) network for airborne applications is...
Wireless Network Sends Real-Time Kinematic GPS Differential Signals Enabling New Applications34 DownloadsRESULTS: AHMCT researchers are developing a wireless network-based approach for delivering precision GPS differential correction signals to vehicles. This system...
NOAA Technical Memorandum NOS NGS 80 – North American Regional Comparison of Absolute Gravimeters (NACAG18)25 DownloadsIntroduction A North American Comparison of Absolute Gravimeters (NACAG18) took place at the Table Mountain Geophysical Observatory (TMGO) near...
A methodology for long-term offshore structural health monitoring using stand-alone GNSS: case study in the Gulf of Mexico29 DownloadsAbstract This article presents a robust methodology for long-term offshore structural health monitoring (SHM) using the Global...
Confidence Intervals30 DownloadsProbability foundations This article discusses confidence intervals of a random variable. Random variables draw their values from some underlying probability distribution, and, in this note, we’ll use the normal probability...
Useful Statistics for Land Surveyors35 DownloadsForeword In earlier days when only transits and tapes were used for traversing, surveyors had guidelines for detecting blunders in their surveys, utilizing closures in a traverse. Modern equipment has changed accuracies...
